Quanzhi Ye and David L. Clark 2019 ApJL 878 L34
The small, weakly active comet 289P/Blanpain recently experienced one of the largest comet outburst ever observed, producing 108 kg of dust and providing us with an intriguing target for its 2020 close encounter.
Christopher Spalding 2019 ApJ 879 12
Solar-like tilts of 6° to a star’s spin axis can naturally arise during the first 10–100 Myr after planet formation as a result of stellar winds that deviate by about 10° from the star’s spin axis.
Jan-Torge Schindler et al 2019 ApJS 243 5
Pan-STARRS’s Extremely Luminous Quasar Survey has searched ~21,486 square degrees for the most luminous quasars located at intermediate redshift (z ≥ 2.8), providing a catalog of 592 sources.
Scott G. Carlsten et al 2019 ApJL 878 L16
Surface brightness fluctuations are used to constrain the distance to low surface brightness dwarfs in the vicinity of M101, eliminating 33 out of 43 candidate satellite dwarf galaxies as background galaxies instead.
Sebastián Pérez et al 2019 AJ 158 15
Computer simulations suggest that the star HD 169142, which hosts a prominent circumstellar disk separated into distinctly observed rings, may be orbited by a migrating low-mass planet that has shaped its disk.
Elise Servajean et al 2019 ApJ 878 146
ALMA observations reveal twelve compact structures — dense cores — within the massive, dense, cold clump G305.137+0.069; these cores can be explained as the result of fragmentation in a collapsing clump.