Nikta Amiri and Jeremy Darling 2016 ApJ 826 136

Luminous water masers are useful for astrometry and proper motion studies. A study of M31 finds water-maser-emitting regions to be more infrared-luminous and show higher star-formation rates.

E. Bon et al 2016 ApJS 225 29

43 years of spectroscopic observations of the Seyfert 1 galaxy NGC 5548 reveal a ~5700 day periodicity in its light curves, consistent with orbital motion inside the broad emission line region of the source.

Graeme H. Smith et al 2016 AJ 152 43

An XMM-Newton search of two subdwarfs and a subgiant suggests that coronal activity decreases with age among the oldest G dwarfs, but K-M subdwarfs possibly have maintained a solar-like level of activity.

G. Barro et al 2016 ApJ 827 L32

ALMA dust continuum observations of six dusty star-forming galaxies at z ~ 2.5 suggest that strong nuclear starbursts transform larger, star-forming progenitors into compact quiescent galaxies.

Sang-Sung Lee et al 2016 ApJ 826 135

VLBI observations indicate that the brightness temperature increases with increasing distance on sub-parsec scales in compact radio jets, suggesting that the jets are accelerated in these sub-parsec regions.

Anbing Ren et al 2016 ApJS 225 28

A statistical analysis of the 51,406 stars in the Kepler field spectroscopically observed with LAMOST found 106 candidate metal-poor stars, 9 candidate very metal-poor stars, and 18 candidate high-velocity stars.