Using new data from the MOSFIRE spectrograph, the authors of this paper test the ability of classic emission line diagnostics to separate star formation activity from supermassive black hole accretion at high redshift. What they find may be important for understanding how the growth galaxies and black holes affect one another over cosmic time.
Observational surveys looking for the smallest super-massive black holes come up empty; could they be hiding in plain sight?
How long does planetary migration take? Crockett et al. look for the answer by searching for hot Jupiters around extremely young stars.
Astronomers often refer to elliptical galaxies as “red and dead” because they appear red in color and aren’t currently forming stars. In this paper, the authors present evidence that elliptical galaxies might not be as dead as we assume.
How well do stellar models match? Would astronomers using different stellar models and identical data determine consistent fits?
A wealth of observations tell an active accretion story within the Lambda Orionis Star Forming Region, at the head of the Orion constellation.