Tiantian Yuan et al 2017 ApJ 850 61
A gravitationally lensed spiral galaxy, A1689B11, was discovered at redshift z = 2.54. It is the most ancient spiral galaxy discovered to date and the second kinematically confirmed spiral at z > 2.
Aldo Serenelli et al 2017 ApJS 233 23
A catalog of spectroscopic and asteroseismic data is presented for a sample of 415 Kepler dwarf and subgiant stars, and stellar properties are inferred from the data and compared to other sources.
A. D. Kapińska et al 2017 AJ 154 253
Citizen-scientist identification of 25 new candidate hybrid morphology radio sources — rare galaxies that display different Fanaroff–Riley classes on opposite sides of their nuclei — reveal this to be a diverse class.
Joseph D. Gelfand et al 2017 ApJ 850 53
Doubling in 41/44 GHz flux density on ~20-minute timescales was observed in the magnetar SGR J1745−29 — consistent with a model in which pulsed emission is generated in the magnetar’s magnetosphere.
Hisashi Hayakawa et al 2017 ApJL 850 L31
Historical documents such as sunspot drawings and reports of low-latitude auroral displays from East Asia demonstrate that an extreme magnetic storm must have occurred in September of 1770.
F. Moreno et al 2017 AJ 154 248
Observations from HST suggest that no nucleus or fragments greater than 30 meters in size survived after asteroid P/2016 G1 was activated and disrupted as it approached the Sun in 2016.