-
Modeling Bounded Rationality in Drug Shortage Pharmacists Using Attention-Guided Dynamic Decomposition
Authors:
Yaniv Eliyahu Amiri,
Noah Chicoine,
Jacqueline Griffin,
Stacy Marsella
Abstract:
Hospital pharmacists make high-stakes decisions to mitigate drug shortages under uncertainty, time pressure, and patient risk. Interviews revealed that pharmacists focus attention on a small subset of drugs, limiting cognitive effort to the most urgent cases. Motivated by these findings, we formalize a bounded-rational, attention-guided decision framework that dynamically decomposes drugs into a s…
▽ More
Hospital pharmacists make high-stakes decisions to mitigate drug shortages under uncertainty, time pressure, and patient risk. Interviews revealed that pharmacists focus attention on a small subset of drugs, limiting cognitive effort to the most urgent cases. Motivated by these findings, we formalize a bounded-rational, attention-guided decision framework that dynamically decomposes drugs into a subset for high-cost reasoning and a complementary subset for low-cost monitoring. We develop two agents: an Expert Agent that applies attention weights derived from pharmacist interviews, and a Learner Agent that adapts attention allocation over time through experience. Across simulated scenarios spanning short to long horizons, we show that attention-guided planning supports stable decision-making without complete state reasoning. These results suggest that a primary decision is not what action to take, but where to allocate cognitive effort, and that attention-guided, satisficing strategies can reduce problem complexity while maintaining stable performance.
△ Less
Submitted 13 May, 2026;
originally announced May 2026.
-
A DECADE of dwarfs: first detection of weak lensing around spectroscopically confirmed low-mass galaxies
Authors:
Chun-Hao To,
Chihway Chang,
Dhayaa Anbajagane,
Risa H. Wechsler,
Alex Drlica-Wagner,
M. Adamów,
A. Alarcon,
M. R. Becker,
J. A. Carballo-Bello,
R. Cawthon,
N. Chicoine,
C. Doux,
J. H. Esteves,
P. S. Ferguson,
M. Gatti,
D. Gruen,
R. A. Gruendl,
K. Herron,
David J. James,
C. E. Martínez-Vázquez,
S. Mau,
J. McCullough,
G. E. Medina,
B. Mutlu-Pakdil,
A. Navarro-Alsina
, et al. (13 additional authors not shown)
Abstract:
We present the first detection of weak gravitational lensing around spectroscopically confirmed dwarf galaxies, using the large overlap between DESI DR1 spectroscopic data and DECADE/DES weak lensing catalogs. A clean dwarf galaxy sample with well-defined redshift and stellar mass cuts enables excess surface mass density measurements in two stellar mass bins ($\log \rm{M}_*=[8.2, 9.2]~M_\odot$ and…
▽ More
We present the first detection of weak gravitational lensing around spectroscopically confirmed dwarf galaxies, using the large overlap between DESI DR1 spectroscopic data and DECADE/DES weak lensing catalogs. A clean dwarf galaxy sample with well-defined redshift and stellar mass cuts enables excess surface mass density measurements in two stellar mass bins ($\log \rm{M}_*=[8.2, 9.2]~M_\odot$ and $\log \rm{M}_*=[9.2, 10.2]~M_\odot$), with signal-to-noise ratios of $5.6$ and $12.4$ respectively. This signal-to-noise drops to $4.5$ and $9.2$ respectively for measurements without applying individual inverse probability (IIP) weights, which mitigates fiber incompleteness from DESI's targeting. The measurements are robust against variations in stellar mass estimates, photometric shredding, and lensing calibration systematics. Using a simulation-based modeling framework with stellar mass function priors, we constrain the stellar mass-halo mass relation and find a satellite fraction of $\simeq 0.3$, which is higher than previous photometric studies but $1.5σ$ lower than $Λ$CDM predictions. We find that IIP weights have a significant impact on lensing measurements and can change the inferred $f_{\rm{sat}}$ by a factor of two, highlighting the need for accurate fiber incompleteness corrections for dwarf galaxy samples. Our results open a new observational window into the galaxy-halo connection at low masses, showing that future massively multiplexed spectroscopic observations and weak lensing data will enable stringent tests of galaxy formation models and $Λ$CDM predictions.
△ Less
Submitted 24 September, 2025;
originally announced September 2025.
-
DECADE+DES Y3 Weak Lensing Mass Map: A 13,000 deg$^2$ View of Cosmic Structure from 270 Million Galaxies
Authors:
M. Gatti,
D. Anbajagane,
C. Chang,
D. J. Bacon,
J. Prat,
M. Adamow,
A. Alarcon,
M. R. Becker,
J. A. Carballo-Bello,
N. Chicoine,
C. Doux,
A. Drlica-Wagner,
P. S. Ferguson,
D. Gruen,
R. A. Gruendl,
K. Herron,
N. Jeffrey,
D. J. James,
A. Kovács,
C. E. Martínez-Vázquez,
P. Massana,
S. Mau,
J. McCullough,
G. E. Medina,
B. Mutlu-Pakdil
, et al. (15 additional authors not shown)
Abstract:
We present the largest galaxy weak lensing mass map of the late-time Universe, reconstructed from 270 million galaxies in the DECADE and DES Year 3 datasets, covering 13,000 square degrees. We validate the map through systematic tests against observational conditions (depth, seeing, etc.), finding the map is statistically consistent with no contamination. The large area covered by the mass map mak…
▽ More
We present the largest galaxy weak lensing mass map of the late-time Universe, reconstructed from 270 million galaxies in the DECADE and DES Year 3 datasets, covering 13,000 square degrees. We validate the map through systematic tests against observational conditions (depth, seeing, etc.), finding the map is statistically consistent with no contamination. The large area covered by the mass map makes it a well-suited tool for cosmological analyses, cross-correlation studies and the identification of large-scale structure features. We demonstrate its potential by detecting cosmic filaments directly from the mass map for the first time and validating them through their association with galaxy clusters selected using the Sunyaev-Zeldovich effect from Planck and ACT DR6.
△ Less
Submitted 3 September, 2025;
originally announced September 2025.
-
The Dark Energy Camera All Data Everywhere cosmic shear project V: Constraints on cosmology and astrophysics from 270 million galaxies across 13,000 deg$^2$ of the sky
Authors:
D. Anbajagane,
C. Chang,
A. Drlica-Wagner,
C. Y. Tan,
M. Adamow,
R. A. Gruendl,
L. F. Secco,
Z. Zhang,
M. R. Becker,
P. S. Ferguson,
N. Chicoine,
K. Herron,
A. Alarcon,
R. Teixeira,
D. Suson,
A. J. Shajib,
J. A. Frieman,
A. N. Alsina,
A. Amon,
F. Andrade-Oliveira,
J. Blazek,
C. R. Bom,
H. Camacho,
J. A. Carballo-Bello,
A. Carnero Rosell
, et al. (56 additional authors not shown)
Abstract:
We present constraints on models of cosmology and astrophysics using cosmic shear data vectors from three datasets: the northern and southern Galactic cap of the Dark Energy Camera All Data Everywhere (DECADE) project, and the Dark Energy Survey (DES) Year 3. These data vectors combined consist of 270 million galaxies spread across 13,000 ${\rm deg}^2$ of the sky. We first extract constraints for…
▽ More
We present constraints on models of cosmology and astrophysics using cosmic shear data vectors from three datasets: the northern and southern Galactic cap of the Dark Energy Camera All Data Everywhere (DECADE) project, and the Dark Energy Survey (DES) Year 3. These data vectors combined consist of 270 million galaxies spread across 13,000 ${\rm deg}^2$ of the sky. We first extract constraints for $Λ$CDM cosmology and find $S_8= 0.805^{+0.019}_{-0.019}$ and $Ω_{\rm m} = 0.262^{+0.023}_{-0.036}$, which is consistent within $1.9 σ$ of constraints from the Planck satellite. Extending our analysis to dynamical dark energy models shows that lensing provides some (but still minor) improvements to existing constraints from supernovae and baryon acoustic oscillations. Finally, we study six different models for the impact of baryons on the matter power spectrum. We show the different models provide consistent constraints on baryon suppression, and associated cosmology, once the astrophysical priors are sufficiently wide. Current scale-cut approaches for mitigating baryon contamination result in a residual bias of $\approx 0.3σ$ in the $S_8, Ω_{\rm m}$ posterior. Using all scales with dedicated baryon modeling leads to negligible improvement as the new information is used solely to self-calibrate the baryon model on small scales. Additional non-lensing datasets, and/or calibrations of the baryon model, will be required to access the full statistical power of the lensing measurements. The combined dataset in this work represents the largest lensing dataset to date (most galaxies, largest area) and provides an apt testing ground for analyses of upcoming datasets from Stage IV surveys. The DECADE shear catalogs, data vectors, and likelihoods are made publicly available.
△ Less
Submitted 14 July, 2026; v1 submitted 3 September, 2025;
originally announced September 2025.
-
MINERVA: A NIRCam Medium Band and MIRI Imaging Survey to Unlock the Hidden Gems of the Distant Universe
Authors:
Adam Muzzin,
Katherine A. Suess,
Danilo Marchesini,
Luke Robbins,
Chris J. Willott,
Stacey Alberts,
Jacqueline Antwi-Danso,
Yoshihisa Asada,
Gabriel Brammer,
Sam E. Cutler,
Kartheik G. Iyer,
Ivo Labbe,
Nicholas S. Martis,
Tim B. Miller,
Ikki Mitsuhashi,
Alexandra Pope,
Anna Sajina,
Ghassan T. E. Sarrouh,
Monu Sharma,
Mauro Stefanon,
Katherine E. Whitaker,
Roberto Abraham,
Hakim Atek,
Marusa Bradac,
Samantha Berek
, et al. (59 additional authors not shown)
Abstract:
We present an overview of the MINERVA survey, a 259.8 hour (prime) and 127 hour (parallel) Cycle 4 treasury program on the James Webb Space Telescope (JWST). MINERVA is obtaining 8 filter NIRCam medium band imaging (F140M, F162M, F182M, F210M, F250M, F300M, F360M, F460M) and 2 filter MIRI imaging (F1280W, F1500W) in four of the five CANDELS Extragalactic fields: UDS, COSMOS, AEGIS and GOODS-N. The…
▽ More
We present an overview of the MINERVA survey, a 259.8 hour (prime) and 127 hour (parallel) Cycle 4 treasury program on the James Webb Space Telescope (JWST). MINERVA is obtaining 8 filter NIRCam medium band imaging (F140M, F162M, F182M, F210M, F250M, F300M, F360M, F460M) and 2 filter MIRI imaging (F1280W, F1500W) in four of the five CANDELS Extragalactic fields: UDS, COSMOS, AEGIS and GOODS-N. These fields were previously observed in Cycle 1 with 7 - 9 NIRCam filters by the PRIMER, CEERS and JADES programs. MINERVA reaches a 5$σ$ depth of 28.1 mag in F300M and covers $\sim$ 542 arcmin$^2$, increasing the area of existing JWST medium-band coverage in at least 8 bands by $\sim$ 7$\times$. The MIRI imaging reaches a 5$σ$ depth of 23.9 mag in F1280W and covers $\sim$ 275 arcmin$^2$ in at least 2 MIRI filters. When combined with existing imaging, these data will provide a photometric catalog with 20-26 JWST filters (depending on field) and 26-35 filters total, including HST. This paper presents a detailed breakdown of the filter coverage, exposure times, and field layout relative to previous observations, as well as an overview of the primary science goals of the project. These include uncovering the physics of enigmatic sources hiding in current broadband catalogs, improving systematics on stellar mass functions and number densities by factors of $\gtrsim$ 3, and resolved mapping of stellar mass and star formation at 1 $< z <$ 6. When complete, MINERVA will become an integral part of the treasury deep field imaging datasets, significantly improving population studies with well-understood completeness, robust photometric redshifts, stellar masses, and sizes, and facilitating spectroscopic follow up for decades to come.
△ Less
Submitted 25 July, 2025;
originally announced July 2025.
-
The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg$^2$ of the sky
Authors:
D. Anbajagane,
C. Chang,
A. Drlica-Wagner,
C. Y. Tan,
M. Adamow,
R. A. Gruendl,
L. F. Secco,
Z. Zhang,
M. R. Becker,
P. S. Ferguson,
N. Chicoine,
K. Herron,
A. Alarcon,
R. Teixeira,
D. Suson,
A. N. Alsina,
A. Amon,
F. Andrade-Oliveira,
J. Blazek,
C. R. Bom,
H. Camacho,
J. A. Carballo-Bello,
A. Carnero Rosell,
R. Cawthon,
W. Cerny
, et al. (50 additional authors not shown)
Abstract:
We present cosmological constraints from the Dark Energy Camera All Data Everywhere (DECADE) cosmic shear analysis. This work uses shape measurements for 107 million galaxies measured through Dark Energy Camera (DECam) imaging of $5,\!412$ deg$^2$ of sky that is outside the Dark Energy Survey (DES) footprint. We derive constraints on the cosmological parameters $S_8 = 0.791^{+0.027}_{-0.032}$ and…
▽ More
We present cosmological constraints from the Dark Energy Camera All Data Everywhere (DECADE) cosmic shear analysis. This work uses shape measurements for 107 million galaxies measured through Dark Energy Camera (DECam) imaging of $5,\!412$ deg$^2$ of sky that is outside the Dark Energy Survey (DES) footprint. We derive constraints on the cosmological parameters $S_8 = 0.791^{+0.027}_{-0.032}$ and $Ω_{\rm m} =0.269^{+0.034}_{-0.050}$ for the $Λ$CDM model, which are consistent with those from other weak lensing surveys and from the cosmic microwave background. We combine our results with cosmic shear results from DES Y3 at the likelihood level, since the two datasets span independent areas on the sky. The combined measurements, which cover $\approx\! 10,\!000$ deg$^2$, prefer $S_8 = 0.791 \pm 0.023$ and $Ω_{\rm m} = 0.277^{+0.034}_{-0.046}$ under the $Λ$CDM model. These results are the culmination of a series of rigorous studies that characterize and validate the DECADE dataset and the associated analysis methodologies (Anbajagane et. al 2025a,b,c). Overall, the DECADE project demonstrates that the cosmic shear analysis methods employed in Stage-III weak lensing surveys can provide robust cosmological constraints for fairly inhomogeneous datasets. This opens the possibility of using data that have been previously categorized as ``unusable'' for cosmic shear analyses, thereby increasing the statistical power of upcoming weak lensing surveys.
△ Less
Submitted 20 October, 2025; v1 submitted 24 February, 2025;
originally announced February 2025.
-
The DECADE cosmic shear project III: validation of analysis pipeline using spatially inhomogeneous data
Authors:
D. Anbajagane,
C. Chang,
N. Chicoine,
L. F. Secco,
C. Y. Tan,
P. S. Ferguson,
A. Drlica-Wagner,
K. Herron,
M. Adamow,
R. A. Gruendl,
M. R. Becker,
R. Teixeira,
Z. Zhang,
A. Alarcon,
D. Suson,
A. N. Alsina,
A. Amon,
F. Andrade-Oliveira,
J. Blazek,
H. Camacho,
J. A. Carballo-Bello,
W. Cerny,
Y. Choi,
C. Doux,
M. Gatti
, et al. (28 additional authors not shown)
Abstract:
We present the pipeline for the cosmic shear analysis of the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog consisting of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. The catalog derives from a large number of disparate observing programs and is therefore more inhomogeneous across the sky compared to existing lensing…
▽ More
We present the pipeline for the cosmic shear analysis of the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog consisting of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. The catalog derives from a large number of disparate observing programs and is therefore more inhomogeneous across the sky compared to existing lensing surveys. First, we use simulated data-vectors to show the sensitivity of our constraints to different analysis choices in our inference pipeline, including sensitivity to residual systematics. Next we use simulations to validate our covariance modeling for inhomogeneous datasets. Finally, we show that our choices in the end-to-end cosmic shear pipeline are robust against inhomogeneities in the survey, by extracting relative shifts in the cosmology constraints across different subsets of the footprint/catalog and showing they are all consistent within $1σ$ to $2σ$. This is done for forty-six subsets of the data and is carried out in a fully consistent manner: for each subset of the data, we re-derive the photometric redshift estimates, shear calibrations, survey transfer functions, the data vector, measurement covariance, and finally, the cosmological constraints. Our results show that existing analysis methods for weak lensing cosmology can be fairly resilient towards inhomogeneous datasets. This also motivates exploring a wider range of image data for pursuing such cosmological constraints.
△ Less
Submitted 20 October, 2025; v1 submitted 24 February, 2025;
originally announced February 2025.
-
The DECADE cosmic shear project II: photometric redshift calibration of the source galaxy sample
Authors:
D. Anbajagane,
A. Alarcon,
R. Teixeira,
C. Chang,
L. F. Secco,
C. Y. Tan,
A. Drlica-Wagner,
M. Adamow,
R. A. Gruendl,
G. Giannini,
M. R. Becker,
P. S. Ferguson,
N. Chicoine,
Z. Zhang,
K. Herron,
D. Suson,
A. N. Alsina,
A. Amon,
C. R. Bom,
J. A. Carballo-Bello,
W. Cerny,
A. Choi,
Y. Choi,
C. Doux,
K. Eckert
, et al. (28 additional authors not shown)
Abstract:
We present the photometric redshift characterization and calibration for the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. The redshifts are estimated from a combination of wide-field photometry, deep-field photometry with associated redshift estimates, and a transfer…
▽ More
We present the photometric redshift characterization and calibration for the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. The redshifts are estimated from a combination of wide-field photometry, deep-field photometry with associated redshift estimates, and a transfer function between the wide field and deep field that is estimated using a source injection catalog. We construct four tomographic bins for the galaxy catalog, and estimate the redshift distribution, $n(z)$, within each one using the Self-organizing Map Photo-Z (SOMPZ) methodology. Our estimates include the contributions from sample variance, zeropoint calibration uncertainties, and redshift biases, as quantified for the deep-field dataset. The total uncertainties on the mean redshifts are $σ_{\langle z \rangle} \approx 0.01$. The SOMPZ estimates are then compared to those from the clustering redshift method, obtained by cross-correlating our source galaxies with galaxies in spectroscopic surveys, and are shown to be consistent with each other.
△ Less
Submitted 20 October, 2025; v1 submitted 24 February, 2025;
originally announced February 2025.
-
The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies
Authors:
D. Anbajagane,
C. Chang,
Z. Zhang,
C. Y. Tan,
M. Adamow,
L. F. Secco,
M. R. Becker,
P. S. Ferguson,
A. Drlica-Wagner,
R. A. Gruendl,
K. Herron,
A. Tong,
M. A. Troxel,
D. Sanchez-Cid,
I. Sevilla-Noarbe,
N. Chicoine,
R. Teixeira,
A. Alarcon,
D. Suson,
A. N. Alsina,
A. Amon,
C. R. Bom,
J. A. Carballo-Bello,
W. Cerny,
A. Choi
, et al. (29 additional authors not shown)
Abstract:
We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam data including survey and standard observing programs. These data were consistently processed with the Dark Energy Survey Data Management pipeline as part of the D…
▽ More
We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam data including survey and standard observing programs. These data were consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and serve as the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release 3 (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. After cuts, the resulting cosmology-ready galaxy shape catalog covers a region of $5,\!412 \,\,{\rm deg}^2$ with an effective number density of $4.59\,\, {\rm arcmin}^{-2}$. The coadd images used to derive this data have a median limiting magnitude of $r = 23.6$, $i = 23.2$, and $z = 22.6$, estimated at ${\rm S/N} = 10$ in a 2 arcsecond aperture. We present a suite of detailed studies to characterize the catalog, measure any residual systematic biases, and verify that the catalog is suitable for cosmology analyses. In parallel, we build an image simulation pipeline to characterize the remaining multiplicative shear bias in this catalog, which we measure to be $m = (-2.454 \pm 0.124) \times10^{-2}$ for the full sample. Despite the significantly inhomogeneous nature of the data set, due to it being an amalgamation of various observing programs, we find the resulting catalog has sufficient quality to yield competitive cosmological constraints.
△ Less
Submitted 20 October, 2025; v1 submitted 24 February, 2025;
originally announced February 2025.
-
COOL-LAMPS VIII: Known wide-separation lensed quasars and their host galaxies reveal a lack of evolution in $M_{\rm{BH}}/M_\star$ since $z\sim 3$
Authors:
Aidan P. Cloonan,
Gourav Khullar,
Kate A. Napier,
Michael D. Gladders,
Håkon Dahle,
Riley Rosener,
Jamar Sullivan Jr.,
Matthew B. Bayliss,
Nathalie Chicoine,
Isaiah Escapa,
Diego Garza,
Josh Garza,
Rowen Glusman,
Katya Gozman,
Gabriela Horwath,
Andi Kisare,
Benjamin C. Levine,
Olina Liang,
Natalie Malagon,
Michael N. Martinez,
Alexandra Masegian,
Owen S. Matthews Acuña,
Simon D. Mork,
Kunwanhui Niu,
M. Riley Owens
, et al. (14 additional authors not shown)
Abstract:
Wide-separation lensed quasars (WSLQs) are a rare class of strongly lensed quasars, magnified by foreground massive galaxy clusters, with typically large magnifications of the multiple quasar images. They are a relatively unexplored opportunity for detailed study of quasar host galaxies. The current small sample of known WSLQs has a median redshift of $z\approx 2.1$, larger than most other samples…
▽ More
Wide-separation lensed quasars (WSLQs) are a rare class of strongly lensed quasars, magnified by foreground massive galaxy clusters, with typically large magnifications of the multiple quasar images. They are a relatively unexplored opportunity for detailed study of quasar host galaxies. The current small sample of known WSLQs has a median redshift of $z\approx 2.1$, larger than most other samples of quasar host galaxies studied to date. Here, we derive precise constraints on the properties of six WSLQs and their host galaxies, using parametric surface brightness fitting, measurements of quasar emission lines, and stellar population synthesis of host galaxies in six WSLQ systems. Our results, with significant uncertainty, indicate that these six hosts are a mixture of star-forming and quiescent galaxies. To probe for co-evolution between AGNs and host galaxies, we model the offset from the `local' ($z=0$) $M_{\rm{BH}}\unicode{x2013}M_\star$ relation as a simple power-law in redshift. Accounting for selection effects, a WSLQ-based model for evolution in the $M_{\rm{BH}}\unicode{x2013}M_\star$ relation has a power-law index of $γ_M=-0.42\pm0.31$, consistent with no evolution. Compared to several literature samples, which mostly probe unlensed quasars at $z<2$, the WSLQ sample shows less evolution from the local relation, at $\sim 4σ$. We find that selection affects and choices of $M_{\rm{BH}}$ calibration are the most important systematics in these comparisons. Given that we resolve host galaxy flux confidently even from the ground in some instances, our work demonstrates that WSLQs and highly magnified AGNs are exceptional systems for future AGN$\unicode{x2013}$host co-evolution studies.
△ Less
Submitted 6 August, 2024;
originally announced August 2024.
-
Weak Gravitational Lensing around Low Surface Brightness Galaxies in the DES Year 3 Data
Authors:
N. Chicoine,
J. Prat,
G. Zacharegkas,
C. Chang,
D. Tanoglidis,
A. Drlica-Wagner,
D. Anbajagane,
S. Adhikari,
A. Amon,
R. H. Wechsler,
A. Alarcon,
K. Bechtol,
M. R. Becker,
G. M. Bernstein,
A. Campos,
A. Carnero Rosell,
M. Carrasco Kind,
R. Cawthon,
R. Chen,
A. Choi,
J. Cordero,
C. Davis,
J. DeRose,
S. Dodelson,
C. Doux
, et al. (80 additional authors not shown)
Abstract:
We present galaxy-galaxy lensing measurements using a sample of low surface brightness galaxies (LSBGs) drawn from the Dark Energy Survey Year 3 (Y3) data as lenses. LSBGs are diffuse galaxies with a surface brightness dimmer than the ambient night sky. These dark-matter-dominated objects are intriguing due to potentially unusual formation channels that lead to their diffuse stellar component. Giv…
▽ More
We present galaxy-galaxy lensing measurements using a sample of low surface brightness galaxies (LSBGs) drawn from the Dark Energy Survey Year 3 (Y3) data as lenses. LSBGs are diffuse galaxies with a surface brightness dimmer than the ambient night sky. These dark-matter-dominated objects are intriguing due to potentially unusual formation channels that lead to their diffuse stellar component. Given the faintness of LSBGs, using standard observational techniques to characterize their total masses proves challenging. Weak gravitational lensing, which is less sensitive to the stellar component of galaxies, could be a promising avenue to estimate the masses of LSBGs. Our LSBG sample consists of 23,790 galaxies separated into red and blue color types at $g-i\ge 0.60$ and $g-i< 0.60$, respectively. Combined with the DES Y3 shear catalog, we measure the tangential shear around these LSBGs and find signal-to-noise ratios of 6.67 for the red sample, 2.17 for the blue sample, and 5.30 for the full sample. We use the clustering redshifts method to obtain redshift distributions for the red and blue LSBG samples. Assuming all red LSBGs are satellites, we fit a simple model to the measurements and estimate the host halo mass of these LSBGs to be $\log(M_{\rm host}/M_{\odot}) = 12.98 ^{+0.10}_{-0.11}$. We place a 95% upper bound on the subhalo mass at $\log(M_{\rm sub}/M_{\odot})<11.51$. By contrast, we assume the blue LSBGs are centrals, and place a 95% upper bound on the halo mass at $\log(M_\mathrm{host}/M_\odot) < 11.84$. We find that the stellar-to-halo mass ratio of the LSBG samples is consistent with that of the general galaxy population. This work illustrates the viability of using weak gravitational lensing to constrain the halo masses of LSBGs.
△ Less
Submitted 14 October, 2024; v1 submitted 26 July, 2024;
originally announced July 2024.
-
COOL-LAMPS. VII. Quantifying Strong-lens Scaling Relations with 177 Cluster-scale Strong Gravitational Lenses in DECaLS
Authors:
Simon D. Mork,
Michael D. Gladders,
Gourav Khullar,
Keren Sharon,
Nathalie Chicoine,
Aidan P. Cloonan,
Håkon Dahle,
Diego Garza,
Rowen Glusman,
Katya Gozman,
Gabriela Horwath,
Benjamin C. Levine,
Olina Liang,
Daniel Mahronic,
Viraj Manwadkar,
Michael N. Martinez,
Alexandra Masegian,
Owen S. Matthews Acuña,
Kaiya Merz,
Yue Pan,
Jorge A. Sanchez,
Isaac Sierra,
Daniel J. Kavin Stein,
Ezra Sukay,
Marcos Tamargo-Arizmendi
, et al. (5 additional authors not shown)
Abstract:
We estimate the Einstein-radius-enclosed total mass for 177 cluster-scale strong gravitational lenses identified by the ChicagO Optically selected Lenses Located At the Margins of Public Surveys (COOL-LAMPS) collaboration with lens redshifts ranging from $0.2 \lessapprox z \lessapprox 1.0$ using the brightest-cluster-galaxy (BCG) redshift and an observable proxy for the Einstein radius. We constra…
▽ More
We estimate the Einstein-radius-enclosed total mass for 177 cluster-scale strong gravitational lenses identified by the ChicagO Optically selected Lenses Located At the Margins of Public Surveys (COOL-LAMPS) collaboration with lens redshifts ranging from $0.2 \lessapprox z \lessapprox 1.0$ using the brightest-cluster-galaxy (BCG) redshift and an observable proxy for the Einstein radius. We constrain the Einstein-radius-enclosed luminosity and stellar mass by fitting parametric spectral energy distributions to aperture photometry from the Dark Energy Camera Legacy Survey in the $g$-, $r$-, and $z$-band Dark Energy Camera filters. We find that the BCG redshift, enclosed total mass, and enclosed luminosity are strongly correlated and well described by a planar relationship in 3D space. We find that the enclosed total mass and stellar mass are correlated with a logarithmic slope of $0.500^{+0.029}_{-0.031}$, and the enclosed total mass and stellar-to-total mass fraction are correlated with a logarithmic slope of $-0.495^{+0.032}_{-0.033}$. In tandem with the small radii within which these slopes are constrained, this may suggest invariance in baryon conversion efficiency and feedback strength as a function of cluster-centric radii in galaxy clusters. Additionally, the correlations described here should have utility in ranking strong-lensing candidates in upcoming imaging surveys -- such as Rubin/Legacy Survey of Space and Time -- in which an algorithmic treatment of strong lenses will be needed due to the sheer volume of data these surveys will produce.
△ Less
Submitted 27 January, 2025; v1 submitted 16 January, 2024;
originally announced January 2024.
-
Thought Bubbles: A Proxy into Players' Mental Model Development
Authors:
Omid Mohaddesi,
Noah Chicoine,
Min Gong,
Ozlem Ergun,
Jacqueline Griffin,
David Kaeli,
Stacy Marsella,
Casper Harteveld
Abstract:
Studying mental models has recently received more attention, aiming to understand the cognitive aspects of human-computer interaction. However, there is not enough research on the elicitation of mental models in complex dynamic systems. We present Thought Bubbles as an approach for eliciting mental models and an avenue for understanding players' mental model development in interactive virtual envi…
▽ More
Studying mental models has recently received more attention, aiming to understand the cognitive aspects of human-computer interaction. However, there is not enough research on the elicitation of mental models in complex dynamic systems. We present Thought Bubbles as an approach for eliciting mental models and an avenue for understanding players' mental model development in interactive virtual environments. We demonstrate the use of Thought Bubbles in two experimental studies involving 250 participants playing a supply chain game. In our analyses, we rely on Situation Awareness (SA) levels, including perception, comprehension, and projection, and show how experimental manipulations such as disruptions and information sharing shape players' mental models and drive their decisions depending on their behavioral profile. Our results provide evidence for the use of thought bubbles in uncovering cognitive aspects of behavior by indicating how disruption location and availability of information affect people's mental model development and influence their decisions.
△ Less
Submitted 30 January, 2023;
originally announced January 2023.