Don't miss

Replay


LATEST SHOWS

EYE ON AFRICA

Kenya’s opposition files a petition against presidential vote

Read more

MEDIAWATCH

'Siempre vida Barcelona'

Read more

THE DEBATE

Spain attacks - Can Europe prepare for vehicle-ramming terror attacks?

Read more

EYE ON AFRICA

Measures in place to prevent Grace Mugabe leaving South Africa

Read more

IN THE PAPERS

Terror in Barcelona

Read more

BUSINESS DAILY

Terror attack, Trump turmoil rattle stock markets

Read more

FRENCH CONNECTIONS

Malbouffe: understanding junk food à la française

Read more

IN THE PAPERS

Lebanon repeals 'rape law', but activists say more is needed to protect women

Read more

BUSINESS DAILY

US business leaders abandon Trump after Charlottesville

Read more

New class of black hole identified

Text by NEWS WIRES

Latest update : 2009-07-01

Astronomers have identified an intermediate class of black hole on the fringe of the galaxy ESO 243-249 with a mass 500 times greater than the sun. The discovery could help illuminate the existence of supermassive black holes.

AFP - Astronomers on Wednesday said they had identified an intermediate class of black hole that could explain how supermassive, light-sucking monsters develop in the heart of galaxies.
   
Their find -- a black hole more than 500 times the mass of the Sun, on the fringe of galaxy ESO 243-249 -- is reported in the latest issue of Nature, the British-based science journal.
   
In terms of size, it lies between supermassive black holes, which can be billions of times the mass of the Sun, and relative tiddlers, which are between three and 20 solar masses.
   
Black holes are among the most powerful forces in the Universe. They are concentrated fields of gravity which are so powerful that nothing, not even light, can escape them.
   
Stellar-mass black holes are believed to have been created from the death throes of massive stars.
   
But there is less consensus over how supermassive black holes, which lurk in the centre of galaxies, including the Milky Way, are formed.
   
"One theory is supermassive black holes may be formed by the merger of a number of intermediate-mass black holes," said lead author Sean Farrell, an astrophysicist at Britain's University of Leicester.
   
"To ratify such a theory, however, you must first prove the existence of intermediate black holes."
   
As black holes do not emit light, the existence and size of the intermediate black hole was detected thanks to its "ultra-luminous" X-ray emissions, spotted by Europe's XMM-Newton orbital telescope.
 

Date created : 2009-07-01

COMMENT(S)