Journals Digest RSS

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.

Chan-Kao Chang et al 2019 ApJS 241 6

A Pan-STARRS survey of asteroid rotation periods has discovered 7 new super-fast rotators, asteroids with rotation periods shorter than 2 hours and diameters larger than ~0.3 km.

Brenna Mockler et al 2019 ApJ 872 151

Modeling of 14 tidal disruption events suggest the events have black-hole masses of 106–108 M and that the masses predicted are as reliable as those based on bulk galaxy properties.

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