Sven Köppel et al 2019 ApJL 872 L16
A nonlinear universal relation is shown to exist between the threshold mass for prompt collapse of a neutron star (NS) and the maximum compactness; from this, future observations may constrain the NS equation of state.
Michael Greklek-McKeon and Drake Deming 2019 AJ 157 77
The EVEREST pipeline is used to evaluate false-positive exoplanet candidates from the K2 mission, identifying 6 systems previously flagged as planetary candidates that are instead eclipsing binaries.
Abhimat Krishna Gautam et al 2019 ApJ 871 103
An 11.5-year adaptive-optics study of variability at the galactic center reveals that roughly half the sample shows variability: ~52% of known early-type young stars and ~43% of known late-type giants.
F. Massaro et al 2019 ApJS 240 20
Despite their radio morphological classification and/or their optical classification, radio galaxies in the local universe tend to live in galaxy-rich large-scale environments that have similar characteristics and richness.
Matías Gárate et al 2019 ApJ 871 53
Reactivation of a dead zone in the protoplanetary disk surrounding RW Aur A could explain various dimming events in recent years that decreased its brightness by ~2 mag for periods of months to years.
May G. Pedersen et al 2019 ApJL 872 L9
TESS data has allowed the detection and classification of new variable O and B stars, including 23 multiperiodic pulsators, 6 eclipsing binaries, 21 rotational variables, and 25 stars with stochastic low-frequency variability.