M. Lazzarini et al 2019 ApJ 884 2
The first deep hard X-ray (E > 10 keV) survey of the Small Magellanic Cloud, conducted with NuSTAR, detected 10 sources above a 3σ significance level and obtained upper limits on an additional 40 sources.
James Paul Mason et al 2019 ApJS 244 13
Four years of continuous SDO EVE observations are evaluated to compile James’s EVE Dimming Index (JEDI), a catalog of coronal dimming events — temporary voids created when coronal mass ejections depart from the Sun.
Sarah Blunt et al 2019 AJ 158 181
Two decades of radial velocity observations are used to detect a planet of at least 3 Jupiter masses on a highly eccentric (e ~ 0.84) orbit with a period of ~74 years around the star HD 120066.
Thomas W.-S. Holoien et al 2019 ApJ 883 111
TESS’s first discovery of a tidal disruption event (TDE), ASASSN-19bt, includes detailed observations from before its rise. The combined data set for ASASSN-19bt is the most detailed pre-peak data set for any TDE.
Kohei Ichikawa et al 2019 ApJL 883 L13
NuSTAR X-ray observation of the nearby galaxy Arp 187 reveal a luminosity decline of this AGN by more than a factor of 1,000, suggesting this is a “dead” quasar that’s currently quiet but had high past activity.
F. Annibali et al 2019 ApJ 883 19
New Hubble imaging of a stream-like system associated with the dwarf galaxy DDO 68 resolves individual stars within the stream, confirming this striking example of hierarchical merging in action at dwarf-galaxy scales.