Raffy Traas et al 2021 AJ 161 286
The Breakthrough Listen search for extraterrestrial intelligence is extended to include targeted searches of stars identified by TESS as potential exoplanet hosts, establishing deep limits on SETI over the 1–11 GHz band.
Guo Chen et al 2021 ApJL 913 L16
Low-resolution transmission spectra of the puffy hot Jupiter HAT-P-65b reveal evidence for titanium oxide in this planet’s relatively clear atmosphere.
Donghyeon J. Khim et al 2021 ApJS 254 27
Simulations point to 4 channels that generate misalignment of the stars and gas in galaxies: mergers (35%), interaction with nearby galaxies (23%), interaction in dense environments (21%), and secular evolution (21%).
Cristina M. Dalle Ore et al 2021 Planet. Sci. J. 2 83
Examination of the H2O ice phase on the surface of Dione, one of Saturn’s icy satellites, supports the hypothesis that Dione might have been recently active and is still harboring a body of liquid water under its crust.
T. Wevers et al 2021 ApJ 912 151
Multiwavelength observations of the TDE AT2018fyk over two years show three distinct accretion states and two state transitions between them, very similar to the behavior of stellar-mass black holes in outburst.
Shantanu P. Naidu et al 2021 ApJL 913 L6
Observations of 2020 CD3 from the Dark Energy Camera and Catalina Sky survey from 2018–19 allow us to calculate that this asteroid was captured into a geocentric orbit in September 2017, temporarily becoming a minimoon.