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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2504.09676 (astro-ph)
[Submitted on 13 Apr 2025]

Title:Investigating the emission mechanism in the spatially-resolved jet of two z $\approx$ 3 radio-loud quasars

Authors:Jaya Maithil, Daniel A. Schwartz, Aneta Siemiginowska, Preeti Kharb, Diana M. Worrall, John F. C. Wardle, Giulia Migliori, Chi C. Cheung, Bradford Snios, Doug B. Gobeille, Herman L. Marshall, Mark Birkinshaw
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Abstract:This study focuses on high-redshift, z > 3, quasars where resolved X-ray jets remain underexplored in comparison to nearby sources. Building upon previous work, we identify and confirm extended kpc-scale jets emission in two quasars (J1405+0415, z = 3.215 ; J1610+1811, z = 3.122) through meticulous analysis of Chandra X-ray data. To deepen our understanding, high-resolution radio follow- up observations were conducted to constrain relativistic parameters, providing valuable insights into the enthalpy flux of these high-redshift AGN jets. The investigation specifically aims to test the X-ray emission mechanism in these quasars by exploring the inverse Compton scattering of cosmic microwave background (IC/CMB) photons by synchrotron-emitting electrons. Our novel method uses a prior to make a Bayesian estimate of the unknown angle of the jet to our line of sight, thus breaking the usual degeneracy of the bulk Lorentz factor and the Doppler beaming factor.
Comments: Accepted in ApJ. 31 pages, 20 figures. All figures are included in the source zip file (Download --> Other formats --> Source)
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE); Astrophysics of Galaxies (astro-ph.GA)
Cite as: arXiv:2504.09676 [astro-ph.HE]
  (or arXiv:2504.09676v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2504.09676

Submission history

From: Jaya Maithil [view email]
[v1] Sun, 13 Apr 2025 18:02:34 UTC (18,364 KB)
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