Avi Shporer et al 2017 ApJL 847 L18
Precise mass measurements of three K2 transiting star–planet systems — K2-51, K2-67, and K2-76 — identify them as stellar binaries with low-mass stellar secondaries, not transiting planets.
Kyle Kremer et al 2017 ApJ 846 95
Models suggest that ~2700 mass-transferring white dwarf binaries will be observable with a negative chirp of 0.1 yr−2 by a space-based gravitational-wave detector like LISA.
Benjamin E. Nelson et al 2017 AJ 154 106
Do hot Jupiters migrate inwards gently via slow disk interactions, or violently via tidal circularization of high-eccentricity orbits? Data from HAT and WASP suggest that both mechanisms may occur.
Wageesh Mishra et al 2017 ApJS 232 5
The properties are explored of 8 cases of interacting coronal mass ejections observed in the heliosphere, including their propagation and expansion speeds and the direction of impact and masses.
David Berardo and Andrew Cumming 2017 ApJL 846 L17
Gas-giant planets that form via a hot-start model (in which runaway accretion forms a hot shock on the surface of the planet) are shown to develop a radiative rather than a convective interior.
Michael Zevin et al 2017 ApJ 846 82
It is possible to constrain natal kick prescriptions and the relative fraction of systems originating from each black-hole formation channel with order ~100 confident detections, solely with chirp-mass measurements.