News tagged with radio emission

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Chameleon pulsar baffles astronomers

A pulsar that is able, without warning, to dramatically change the way in which it shines has been identified by an international team of astronomers.

Jan 24, 2013
4.8 / 5 (19) 25 | with audio podcast

First 'bone' of the Milky Way identified

(Phys.org)—Our Milky Way is a spiral galaxy—a pinwheel-shaped collection of stars, gas and dust. It has a central bar and two major spiral arms that wrap around its disk. Since we view the Milky Way from ...

Jan 08, 2013
4.4 / 5 (8) 4 | with audio podcast

Our galaxy's 'geysers' are towers of power

"Monster" outflows of charged particles from the centre of our Galaxy, stretching more than halfway across the sky, have been detected and mapped with CSIRO's 64-m Parkes radio telescope. Corresponding to ...

Jan 02, 2013
4.1 / 5 (15) 61 | with audio podcast

A new class of extragalactic objects

A blazar is a galaxy with an intensely bright central nucleus containing a supermassive black hole, much like a quasar. The difference is that a blazar can emit light with extremely high energy gamma rays ...

Oct 29, 2012
3.9 / 5 (14) 1 | with audio podcast

A black widow's Tango Mortale in gamma-ray light

Pulsars are the compact remnants from explosions of massive stars. Some of them spin around their own axis hundreds of times per second, emitting beams of radiation into space. Until now, they could only ...

Oct 25, 2012
5 / 5 (7) 0 | with audio podcast

X-raying stellar winds in a high-speed collision

(Phys.org)—Two massive stars racing in orbit around each other have had their colliding stellar winds X-rayed for the first time, thanks to the combined efforts of ESA's XMM-Newton and NASA's Swift space ...

Oct 12, 2012
5 / 5 (3) 3 | with audio podcast

Astronomers discover a new black hole in our galaxy

(Phys.org)—NASA's Swift satellite recently detected a rising tide of high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, announced the ...

Oct 05, 2012
4.5 / 5 (13) 14 | with audio podcast

Bio-inspired nanoantennas for light emission

Just as radio antennas amplify the signals of our mobile phones and televisions, the same principle can apply to light. For the first time, researchers from CNRS and Aix Marseille Université have succeeded ...

Jul 30, 2012
5 / 5 (1) 0