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.
The observed gamma-ray distribution toward the galactic center was mostly reproduced using a new model of cosmic-ray transport and diffusion, but some of the finer details were missed.
Kaustav K. Das et al 2024 ApJL 969 L11
Modeling suggests that a recent supernova resulted from the explosion of a star with main-sequence mass below 10 solar masses that had been stripped of its atmosphere.
Althea V. Moorhead et al 2024 AJ 168 16
A new reference magnitude for the rate at which meteors pass through Earth’s atmosphere has been developed, and the new reference may be less sensitive to population index than previous references.