Jeffrey D. P. Kenney et al. 2015 AJ 150 59

HST observations of spiral galaxy NGC 4921 reveal how ram pressure strips the ISM from its disk and suggest that magnetic fields help bind the dense gas clouds to the lower-density gas.

Kyoung-Sun Lee et al. 2015 ApJ 809 114

A study of the elemental composition of polar jets on the Sun shows that they have photospheric abundances, similar to those of the fast solar wind.

Eric J. Korpela et al. 2015 ApJ 809 139

This study models the planetary transit light curves expected for a synchronously rotating exoplanet inhabited by a civilization that uses orbiting mirrors to light its dark side!

Takatoshi Shibuya et al. 2015 ApJS 219 15

Using a sample of 190,000 HST galaxies, the effective radius of galaxies is shown to decrease with higher redshift in the range z=0–10.

A. Drlica-Wagner et al. 2015 ApJ 809 L4

Eight newly-detected dwarf spheroidal satellite galaxies of the Milky Way were searched for indirect evidence of dark matter in the form of excess gamma-ray radiation. None was found.

Alexander Scholz et al. 2015 ApJ 809 L29

A survey of brown dwarfs finds that their spin rate shows little or no evidence of rotational braking between 1-10 Myr, in contrast to low-mass stars.