The question of how some supernova progenitor stars undergo outbursts so energetic that their envelopes should come unbound could be resolved by the presence of a compact binary companion.
Q. A. Ge et al 2024 AJ 168 25
As researchers use older and older stars to trace the position of the Milky Way’s spiral arms, the location of the Perseus Arm shifts away from the galactic center.
A bright circumstellar debris disk at a distance of more than 2 au may be responsible for the unexplained dip in the transmission spectrum of the exoplanet WASP-39b.
The submicrosecond Shapiro effect — a general relativistic effect due to the presence of mass — was seen in three pulsars, allowing their masses to be measured precisely from 2–4 years of data.
Supernovae similar to SN 1991T may be associated with rare Type Ia circumstellar material supernovae, or they may be their own separate subclass of singly degenerate Type Ia supernovae.
Jean-Luc Margot et al 2024 Planet. Sci. J. 5 159
What is a planet? A new work uses dynamical criteria to define a universal clearing timescale that applies to everything from brown dwarfs to stellar remnants and makes a distinction between planets and satellites.