S. Mau et al 2020 ApJ 890 136
Two ultra-faint stellar systems have been discovered around the Milky Way in early data from the DELVE survey; if confirmed, the first, Centaurus I, would be one of the brightest recently discovered ultra-faint dwarf galaxies.
Jinghua Zhang et al 2020 ApJS 247 9
Spectra from the LAMOST–Kepler program are used to measure chromospheric magnetic activity for 59,816 stars and the photospheric magnetic activity for 5,575 stars, confirming the dependence of both on stellar rotation.
Steven M. Silverberg et al 2020 ApJ 890 106
Four new Peter Pan disk candidates — disks with extreme infrared excess and accretion activity at an age greater than the expected accretion disk lifetime — have been identified via the Disk Detective citizen science project.
Danny C. Price et al 2020 AJ 159 86
No technosignatures were found in the most comprehensive search conducted over 1.10–3.45 GHz to date with the Parkes and the Green Bank radio telescopes as part of the Breakthrough Listen initiative.
Kojiro Kawana et al 2020 ApJL 890 L26
When a helium white dwarf is tidally disrupted by an intermediate-mass black hole, it will also be detonated by the tidal compression and by succeeding shocks, potentially producing a variety of observational signatures.
Richard G. Arendt et al 2020 ApJ 890 2
Spitzer’s final Infrared Array Camera observations of the supernova SN 1987A show the 3.6 and 4.5 μm emission from the equatorial ring continues a period of steady decline; this can be monitored in the furture with JWST.