Enrico M. Di Teodoro et al 2019 ApJL 885 L32
The first evidence has been found of molecular gas in two atomic hydrogen (H i) clouds associated with gas outflowing from the Small Magellanic Cloud, likely due to relatively weak starburst-driven winds.
Jacob H. Hamer and Kevin C. Schlaufman 2019 AJ 158 190
Data from Gaia Data Release 2 indicates that hot-Jupiter hosts are, on average, younger than field stars — suggesting that tidal interactions cause hot Jupiters to inspiral while their host stars are on the main sequence.
Yuhito Shibaike et al 2019 ApJ 885 79
A new scenario — which well reproduces observations — is hypothesized for the origin of Jupiter’s Galilean system, based on the capture of several planetesimal seeds and subsequent slow accretion of pebbles.
Hu Zou et al 2019 ApJS 245 4
The Beijing–Arizona Sky Survey, a wide and deep optical imaging survey covering a 5400 deg2 area, aims to provide galaxy and quasar targets for follow-up by the Dark Energy Spectroscopic Instrument.
Yutaka Hirai et al 2019 ApJ 885 33
New simulations demonstrate that neutron-star mergers, asymptotic giant branch stars, electron-capture supernovae, and rotating massive stars all play roles in the enrichment histories of Local Group dwarf galaxies.
Michael W. Coughlin et al 2019 ApJL 885 L19
Even with single-detector gravitational-wave events localized to thousands of square degrees, systematic kilonova discovery is feasible with follow-up campaigns with telescopes like ZTF and Palomar Gattini-IR.