New Kid on the Block: Scaling the SZ Effect in Clusters
Estimating galaxy cluster masses is difficult, but it might be getting more precise thanks to the Sunyaev-Zeldovich effect.
The search for an ex-companion star within a type Ia supernova remnant
Schaefer & Pagnotta search supernova remnant 0509-67.5 for signs of an ex-companion to the white dwarf which exploded as a type Ia supernovae.
“Even at midday did a wandering people gaze upon a bold star . . .”: Historic Supernovae
Astronomers combine ancient Chinese and Roman records with a modern understanding of astronomical events.
Detecting Moons Around Exoplanets
Moons in other solar systems are common in science fiction. Are they common in the universe as well? Kipping et al. are using Kepler data to find out.
Blasts from the Past: How Astronomers Measure Echoes in Space
An overview of how astronomers identify and interpret light echoes.
A Tale Of Two Stars: Early Results From The Type Ia Supernova SN2011fe (Part I)
Those watching the sky in August may have heard the news that a new star had appeared: the type Ia supernova PTF11kly (later rechristened SN2011fe) had touched off in M101, the Pinwheel Galaxy, a bare 6.4 Mpc away; close enough that for a brief period the supernova was visible to anyone with a good pair of binoculars. As the closest recent type Ia observed, astronomers were able to use it to place the first direct observational constraints on the progenitor of a type Ia supernova.