Radio waves from black hole detectedJuly 11th, 2012 - 4:26 pm ICT by IANS
Sydney, July 11 (IANS) Surprisingly, scientists have for the first time ever detected the radio waves emanating from a mid-sized black hole, called the HLX-1, around 300 million light years away, located in a galaxy called ESO 243-49.
A team led by Sean Farrell from the University of Sydney’s School of Physics, which detected those signals, said these also allow them to estimate the size of the newly discovered black hole.
“Black holes are areas where the matter is so densely squeezed into a small space that it makes gravity pull strongly enough to stop light from escaping,” said Farrell, in the journal Nature.
“Astronomers have classified black holes into stellar mass black holes, which are up to tens of times the mass of our sun, and super massive black holes, which are millions to billions of times the mass of our sun,” said Farrell, according to a Sydney statement.
“HLX-1 lies in between these two sizes at around 20,000 times the mass of our sun. So we’ve called it an intermediate mass black hole,” said Farrell.
“HLX-1 is located in a galaxy called ESO 243-49 about 300 million light years away from us,” he added.
Using the Australia Telescope Compact Array and NASA’s Swift satellite, the team that included scientists from France, Britain and the US examined radio emissions during two state transitions of the black hole HLX-1 in 2010 and 2011.
Emil Lenc, Farrell’s counterpart at the School of Physics, said: “So, what we tend to see is the X-ray emission and then, a day or two or even a few days later, the source flares up in radio waves.”
- Astronomers discover new class of black holes - Jul 02, 2009
- New class of medium sized black holes found - Jul 06, 2009
- Astronomers stumble on massive black holes - Dec 07, 2011
- Supermassive black hole discovered in dwarf galaxy - Jan 10, 2011
- Radio telescopes to try taking first photo of black hole - Jan 16, 2012
- Astronomers detect black hole farther away than any other previously known - Jan 27, 2010
- Astronomers find supermassive black holes - Sep 01, 2011
- NASA's Swift satellite finds unseen black-hole-powered galaxies - Jan 21, 2011
- Cold streams of gas pushed huge growth in black holes - Dec 14, 2011
- Fresh evidence for 'survivor' black holes from NASA - Apr 30, 2010
- Astromers capture rare flaring black hole - Sep 21, 2011
- What makes black holes at galaxy centre become active - Jun 16, 2010
- NASA finds giant ring of black holes - Feb 10, 2011
- NASA identifies best case for middleweight black hole - Nov 11, 2009
- Scientists discover active black hole in the 'Eye of Sauron' - Mar 11, 2011
Tags: astronomers, australia telescope, billions, black hole, black holes, counterpart, emil, hlx, journal nature, lenc, million light years, nasa, radio emissions, radio waves, ray emission, state transitions, swift satellite, telescope compact array, university of sydney, x ray