Petr Pokorný and Marc Kuchner 2019 ApJL 873 L16
Dust modeling suggests that the narrow circumsolar ring of dust observed by the Helios and STEREO spacecrafts to be associated with Venus’s orbit is most likely produced by a population of Venus co-orbital asteroids.
Mathew Schofield et al 2019 ApJS 241 12
The target list of solar-type stars to be observed in short-cadence (2 minutes) for asteroseismology by the NASA TESS mission is comprised of bright, cool main-sequence and subgiant stars.
Nick Choksi et al 2019 ApJ 873 100
Models indicate that black-hole binaries that are ejected and later merge ex situ form in star clusters of a characteristic mass M ~ 105.3 M☉, whereas binaries that merge in situ form in more massive clusters, M ~ 105.7 M☉.
Shoya Kamiaka et al 2019 AJ 157 137
Asteroseismology of Kepler-408 reveals that the stellar inclination is ~42° relative to the orbit of its 0.86-Earth-radius planet. Kepler-408b is by far the smallest planet known to have a significantly misaligned orbit.
Daniela Bettoni et al 2019 ApJL 873 L14
Hubble images revealed an Einstein cross lensing system that consists of an unusual Lyman-break galaxy (LBG) at z = 3.03 lensed by a galaxy at z = 0.556. This is only the second known case of a lensed LBG.
Elen C. A. Golightly et al 2019 ApJ 872 163
Models show that, for a fast-spinning black hole, whether the spin is prograde or retrograde has significant impact on the effectiveness and timing of a tidal disruption event, with prograde spins resulting in faster fallback.