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.
Jenny E. Greene et al 2021 ApJ 917 17
A search for hypercompact star clusters that may host intermediate-mass black holes comes up short, though some models predict ~100 of these wandering black holes exist in the Milky Way.
Francesco Panerai et al 2021 Planet. Sci. J. 2 179
Heating samples of meteorites from room temperature to 1200°C causes metals to melt and internal voids to form, which has implications for the fragmentation of objects entering Earth’s atmosphere.
J. J. Condon et al 2021 ApJ 917 18
Observations of nearby elliptical galaxy IC 4296 from the MeerKAT radio telescope array reveal new morphological features dubbed threads, ribbons, and rings.