Roberta M. Humphreys et al 2017 ApJ 848 86
New results on two supernova impostors in NGC 2403 suggest that both survivors are now hot supergiant stars, and their progenitors were evolved massive stars that experienced eruptions or high-mass-loss events.
Alexandra E. Truebenbach and Jeremy Darling 2017 ApJS 233 3
A new catalog of 713 extragalactic proper motions is presented and used to model the secular aberration drift, an observer-induced effect caused by the acceleration of the solar system around our galaxy’s center.
Souradeep Bhattacharya et al 2017 ApJ 847 138
Analysis of the morphological shape of Berkeley 17, the oldest known open cluster (~10 Gyr), reveals that most massive stars have sunk to the core of the cluster, leaving the lower-mass stars to be stripped away.
David L. Nidever et al 2017 AJ 154 199
The SMASH survey of the Large and Small Magellanic Clouds has put out its first public data release, revealing measurements of 100 million objects and the discovery of a new Milky Way satellite.
Ka-Wah Wong et al 2017 ApJL 849 L17
NuSTAR has detected hard X-ray emission >10 keV for the first time from the unresolved X-ray core of M87, long expected to emit at these wavelengths due to itsjet or accretion flow.
Shuhei Koyama et al 2017 ApJ 847 137
A study of local galaxies suggests that star formation activity within individual galaxies is primarily controlled by the galaxies’ molecular gas content, regardless of their global environment.