News tagged with nuclei

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Suspects in the quenching of star formation exonerated

Supermassive black holes millions to billions times the mass of our Sun lie at the heart of most, maybe all large galaxies. Some of these power brilliantly luminous, rapidly growing objects called active galactic nuclei that ...

Oct 11, 2011
4.4 / 5 (5) 2 | with audio podcast

AGNs as a new standard candle?

Nope. A standard candle isn’t the same red, green, blue, yellow and omni-present pink wax sticks that decorate your every day birthday cake. Until now a standard candle meant a Cepheid variable star – ...

Sep 27, 2011
5 / 5 (3) 2

The Milky Way's supermassive black hole

Supermassive black holes - objects with masses of millions or even billions of suns - are found at the nuclei of galaxies. Our Milky Way galaxy, for example, has a massive black hole at its core, albeit one ...

Aug 08, 2011
4.4 / 5 (10) 14 | with audio podcast

Vessel to contain cosmic force takes shape

At the heart of most celestial objects is a dynamo. The Earth's dynamo, spun to life in the molten metal core of our planet, generates a magnetic field that helps us find north and, perhaps more critically, ...

Jul 21, 2011
4.4 / 5 (7) 4

What activates a supermassive black hole?

A new study combining data from ESO's Very Large Telescope and ESA's XMM-Newton X-ray space observatory has turned up a surprise. Most of the huge black holes in the centres of galaxies in the past 11 billion ...

Jul 13, 2011
4.7 / 5 (13) 108 | with audio podcast

Modeling the bizarre: Quantum superfluids

(PhysOrg.com) -- More than 100 years since superconductivity was discovered, a comprehensive description for the behavior of a broad class of fundamental physical systems that exhibit the bizarre properties ...

Jun 23, 2011
5 / 5 (6) 1 | with audio podcast