Huichao Li et al 2021 ApJL 917 L26
Analysis of the solar corona and solar wind suggests that solar cycle 24/25 is not entirely unusual, and that the Sun’s polar magnetic field strength may be a useful way to characterize solar minima.
Jin-Ping Zhu et al 2021 ApJ 917 24
Simulations of black hole–neutron star mergers suggest that black holes with low spin may produce little electromagnetic radiation during a merger, leading to low rates of detection.
Kimberly M. Moore et al 2021 Planet. Sci. J. 2 181
Twenty-five years of observations of Saturn’s magnetic field confirm it to be constant on decades-long timescales, clouding attempts to understand Saturn’s internal structure.
Peter Garnavich et al 2021 ApJ 917 22
LAMOST J024048.51+195226.9 is confirmed as the second known AE Aquarii object: a cataclysmic variable star with outflowing material powered by a rapidly spinning, magnetized white dwarf.
Joohyun Lee et al 2021 ApJL 917 L15
Simulations of high-speed galaxy collisions result in dark-matter-deficient galaxies with luminous star clusters, possibly explaining the unusual properties of NGC1052-DF2 and NGC1052-DF4.
Stefano Facchini et al 2021 AJ 162 99
Observations of 13 chemical species in protoplanetary disk PDS 70, which is home to two massive planets, provide evidence for planets accreting carbon-rich gas in real time.