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Stars are large balls of plasma, predominantly hydrogen and helium. The birth, evolution and death of stars are of particular research interest. Other important topics include understanding the internal processes, such as fusion, that generate great quantities of radiation and the gravitational interactions between stars.
Through next-generation spectral analysis, scientists have uncovered an evolutionary path for Wolf–Rayet stars in metal-poor environments. Characterized by hard ionizing radiation, these stars challenge current assumptions about massive star evolution.
Magnetic fields in stellar upper atmospheres are key to understanding stellar activity and its planetary effects. Here, the authors study chromospheric magnetic fields in three M-dwarf stars using spectropolarimetric observations, finding fields reaching hundreds of Gauss with complex height-dependent structures.
This study identifies the Giant Oval Cavity as a large, long-lived superbubble in the Perseus Arm. Its slow expansion, sustained by frequent supernovae, balances Galactic shear and turbulent pressure, revealing a quasi-stationary feedback structure crucial for galactic evolution.
How do low-mass binaries age? Astronomers have constrained a tight, circular orbit of a close-in companion around a dying giant star, raising new questions about how tidal forces shape binary orbits in the final phases of stellar evolution.
The TRAPPIST-1 system — seven Earth-sized worlds around a tiny star — reshaped exoplanet science, proving that faint low-mass M-dwarfs are prime targets in the search for habitable planets and life beyond Earth.
Coordinated observations between the Hubble Space Telescope and ground-based telescopes of a star that is an analogue of the young Sun have uncovered multi-temperature signatures of stellar coronal mass ejections. The detection of fast–warm and slow–cool plasma components suggests a solar-like but more complex picture of stellar eruptions, with impact on the planets around young stars.
Eugene Vasiliev started developing Agama to support both personal research and the growing needs of the stellar and galactic dynamics community. Looking ahead, Agama is set to become an all-rounder for dynamical modelling.
