Lorenzo Pino et al 2020 ApJL 894 L27
The first detection of atomic emission lines from the atmosphere of an exoplanet has been made: the discovery of neutral iron lines from the 4,000-K dayside of KELT-9b with the HARPS-N spectrograph.
Julián D. Alvarado-Gómez et al 2020 ApJ 895 47
Simulations of coronal mass ejections from mid-activity M-dwarf stars like Proxima Centauri show that while shocks are generated in the corona, they don’t produce detectable type II radio bursts.
Rhys Taylor et al 2020 AJ 159 218
Archival data from the Arecibo Galaxy Environment Survey reveal 10 streams of H I gas (and 16 additional, less-certain detections) stripped from galaxies through orbital interactions within the Virgo cluster.
G. Tautvaišienė et al 2020 ApJS 248 19
New observations determine the main atmospheric parameters, ages, orbital parameters, velocity components, and chemical abundances for 277 slowly rotating single stars in the TESS continuous viewing zone field.
N. Rea et al 2020 ApJ 894 159
Chandra X-ray observations of SGR J1745−2900, a magnetar that lies within parsecs of the Milky Way’s central black hole Sgr A*, track its outburst onset in 2013 and subsequent cooling over the next 6 years.
Michaël Marsset et al 2020 Planet. Sci. J. 1 16
Examination of three binary trans-Neptunian objects show similar colors for each of the pairs, suggesting similar surface composition and supporting an origin model of gravitational collapse of a pebble cloud.