Omar López-Cruz et al 2019 ApJL 886 L2
Investigation of the star formation histories of galaxies in the Seyfert’s Sextet suggests that the galaxies have already crossed once, consuming most of their gas, and are now interacting for a second time.
Colby Ostberg and Stephen R. Kane 2019 AJ 158 195
New analysis suggests we will discover an estimated 259 Venus analogs by the end of the TESS primary mission, allowing us to explore terrestrial planets in potential runaway greenhouse scenarios.
Matías Suazo et al 2019 ApJ 885 127
Cosmological hydrodynamic simulations suggest that gas fragmentation produces less massive black hole seeds in the context of direct collapse; however, they are still prone to merge.
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.