Poshih Chiang and W. P. Chen 2015 ApJ 811 L16
Two recently-discovered methane dwarfs, located in the dark cloud L 1688 of the ρ Oph star-forming region, represent the youngest T dwarfs ever confirmed.
Ye Li and Bing Zhang 2015 ApJ 810 41
The chances of a planet being exposed to a lethal GRB increases at higher redshifts. Simulations show that at z=1.5 (3), 50% (10%) of galaxies have a low enough rate of GRB exposure for life to survive.
Yuji Matsumoto et al 2015 ApJ 810 106
N-body simulations show that the eccentricities of planets that result from protoplanet mergers are much smaller than escape eccentricity due to very efficient collision damping.
William Janesh et al 2015 ApJ 811 35
A possible optical counterpart to ultra-compact high velocity cloud AGC 198606 has been detected by the ALFALFA survey, supporting the idea that this may be a low-mass dwarf galaxy.
S. Riemer-Sørensen et al 2015 ApJ 810 48
The first search for dark matter line emission in the 3-80 keV range, in the form of a pointed observation of the Bullet Cluster with NuSTAR, yielded no detection.
Eugene Vasiliev et al 2015 ApJ 810 49
Simulations show that without collisional relaxation, axisymmetric galaxies still exhibit the final-parsec problem, but in tri-axial galaxies the binary can coalesce in <1 Gyr.