Adam S. Jermyn et al 2021 ApJ 914 105
Stars formed in or captured by accretion disks in active galactic nuclei spin up rapidly via accretion, eventually reaching and maintaining near-critical rotation rates. They may later evolve into high-spin massive black holes.
M. G. Dainotti et al 2021 ApJL 914 L40
Recent analysis suggests short gamma-ray bursts may have been more luminous in the past, with an formation rate delayed relative to the star formation rate, as expected if they are the products of stellar remnant mergers.
Hannah Diamond-Lowe et al 2021 AJ 162 10
New ultraviolet observations evaluate the high-energy environment around a nearby mid-M dwarf, LHS 3844, which hosts a terrestrial world that lacks a substantial atmosphere.
Anthony Carr and Tamara Davis 2021 ApJ 914 97
A small systematic error is identified in the NASA/IPAC Extragalactic Database (NED) and the effects are described on the reported redshifts in this catalog of millions of astrophysical objects.
M. Amiri et al 2021 ApJS 255 5
The CHIME digital pulsar observing system can monitor 400–500 pulsar positions once per sidereal day and observe most sources with declinations greater than −20° once every ~4 weeks.
Michael K. Shepard et al 2021 Planet. Sci. J. 2 125
A new shape model of asteroid 16 Psyche, built from observations spanning a wide range of wavelengths, predicts the asteroid’s overall radar albedo and suggests its upper meter of regolith has significant metal content.