Astrophysical Journal

Massive stellar winds are made of tiny pieces

(Phys.org)—ESA's XMM-Newton space observatory has completed the most detailed study ever of the fierce wind from a giant star, showing for the first time that it is not a uniform breeze but is fragmented ...

Feb 05, 2013
4.2 / 5 (10) 2 | with audio podcast

Galaxies fed by funnels of fuel

(Phys.org) —Computer simulations of galaxies growing over billions of years have revealed a likely scenario for how they feed: a cosmic version of swirly straws.

May 24, 2013
4.2 / 5 (10) 36 | with audio podcast

The spectra of white dwarf stars

Yesterday I talked about the Higgs, and how its discovery has led to a flurry of articles about how it might apply to astrophysics. So today here's another example, and this one's interesting because it's ...

Oct 09, 2014
4.7 / 5 (9) 0

Black hole growth found to be out of sync

(Phys.org) -- New evidence from NASA's Chandra X-ray Observatory challenges prevailing ideas about how black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole ...

Jun 11, 2012
4.6 / 5 (9) 1 | with audio podcast

Catching a gravitational wave

(Phys.org) —When Albert Einstein proposed the existence of gravitational waves as part of his theory of relativity, he set in train a pursuit for knowledge that continues nearly a century later.

Jun 26, 2014
4.1 / 5 (10) 1

Galaxy-wide echoes from the past

(Phys.org)—A new galaxy class has been identified using observations from ESO's Very Large Telescope, the Gemini South telescope, and the Canada-France-Hawaii Telescope. Nicknamed 'green bean galaxies' ...

Dec 05, 2012
5 / 5 (8) 4 | with audio podcast

Vela Pulsar

(Phys.org)—This movie from NASA's Chandra X-ray Observatory shows a fast moving jet of particles produced by a rapidly rotating neutron star, and may provide new insight into the nature of some of the densest ...

Jan 08, 2013
5 / 5 (8) 6 | with audio podcast

How abundant are Super-Earths?

Our solar system hosts a cornucopia of worlds, from the hellfire of Venus to the frozen plains of Mars to the mighty winds of Uranus. In that range, the Earth stands alone, with no planet coming close to ...

Dec 03, 2013
4 / 5 (10) 3 | with audio podcast