Diana Dragomir et al 2019 ApJL 875 L7
TESS’s recent discoveries include HD 21749b, a sub-Neptune in a 36 day orbit around a bright and nearby K dwarf, and HD 21749c, the first Earth-size (R ~ 0.89 Earth radii) planet that TESS has found.
Yumi Bamba et al 2019 ApJ 874 73
The largest magnetic storm in solar cycle 24 was caused by a fast coronal mass ejection thatmay have been triggered by a small magnetic disturbance generating a tiny precursor brightening at the time of a C2.4 flare.
Arjun Dey et al 2019 AJ 157 168
The DESI Legacy Imaging Surveys are a combination of three public projects that will jointly image ~14,000 deg2 of the extragalactic sky visible from the northern hemisphere in three optical bands.
S. K. Betti et al 2019 ApJ 874 53
ALMA dust-continuum observations of galaxies suggest that environmental processes such as mergers and ram-pressure stripping likely affect the gas mass fraction of galaxies in dense filamentary cluster environments.
Huiqin Yang and Jifeng Liu 2019 ApJS 241 29
From the long-cadence data of Kepler DR 25, a flare catalog has been built comprising 3,420 flare stars and 162,262 flare events, allowing for new theories about the relation between flare activity and stellar rotation.
Lin Yan et al 2019 ApJ 874 44
A detailed study of a transient in the center of SDSS1115+0544 suggests this event is a “turn-on” AGN, transitioning from a quiescent state to a type-1 AGN on a very short timescale of ~120–200 days.