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http://www.msnbc.msn.com/id/7070845/
Strange space burst
could be new object
Scientists analyze multiple
radio ?burps? from galactic center
The white arrow points the source of the strange emissions on a radio image of the central region of the Milky Way galaxy.
Updated: 10:02 p.m. ET March 2, 2005 WASHINGTON -
A strange and powerful burst of radio waves from near the center of our galaxy may have come from a previously unknown type of space object, astronomers reported Wednesday.
Other experts nicknamed the mysterious source a "burper" and said there would be a race to scan for similar radio bursts.
"We hit the jackpot," said Scott Hyman, a professor of physics at Sweet Briar College in Virginia, who led the study. "An image of the galactic center, made by collecting radio waves of about 1 meter (3 feet) in wavelength, revealed multiple bursts from the source during a seven-hour period from Sept. 30 to Oct. 1, 2002 ? five bursts in fact, and repeating at remarkably constant intervals."
The burst came from the direction of the middle of the Milky Way galaxy, of which Earth is a part, and could have originated from as far away as 24,000 light-years or from as close as 300 light-years. A light-year is the distance light travels in a year, or about 6 trillion miles (10 trillion kilometers).
NRL/SBC Galactic Center Radio Group
This is a closeup of the radio image, showing the new source located below a ring of debris from a supernova remnant, as well as a chart of radio bursts.
--------------------------------------------------------------------------------
It cannot have come from a celestial object known as a pulsar, the researchers write in Thursday's issue of the journal Nature, but the source could be a brown dwarf of a magnetar ? an exotic star with an extremely powerful magnetic field.
They have named the presumed object GCRT J1745-3009.
"GCRT J1745-3009 will cause a stampede of further observations," Shri Kulkarni and Sterl Phinney of the California Institute of Technology wrote in a commentary. "But perhaps even more important is the possibility that the radio heavens contain other fast radio transients (which, in anticipation of a trove of discoveries, we nickname 'burpers')."
Hyman and colleagues made the discovery by studying observations made by the National Science Foundation's Very Large Array radio telescope in New Mexico.
Strange space burst
could be new object
Scientists analyze multiple
radio ?burps? from galactic center
The white arrow points the source of the strange emissions on a radio image of the central region of the Milky Way galaxy.
Updated: 10:02 p.m. ET March 2, 2005 WASHINGTON -
A strange and powerful burst of radio waves from near the center of our galaxy may have come from a previously unknown type of space object, astronomers reported Wednesday.
Other experts nicknamed the mysterious source a "burper" and said there would be a race to scan for similar radio bursts.
"We hit the jackpot," said Scott Hyman, a professor of physics at Sweet Briar College in Virginia, who led the study. "An image of the galactic center, made by collecting radio waves of about 1 meter (3 feet) in wavelength, revealed multiple bursts from the source during a seven-hour period from Sept. 30 to Oct. 1, 2002 ? five bursts in fact, and repeating at remarkably constant intervals."
The burst came from the direction of the middle of the Milky Way galaxy, of which Earth is a part, and could have originated from as far away as 24,000 light-years or from as close as 300 light-years. A light-year is the distance light travels in a year, or about 6 trillion miles (10 trillion kilometers).
NRL/SBC Galactic Center Radio Group
This is a closeup of the radio image, showing the new source located below a ring of debris from a supernova remnant, as well as a chart of radio bursts.
--------------------------------------------------------------------------------
It cannot have come from a celestial object known as a pulsar, the researchers write in Thursday's issue of the journal Nature, but the source could be a brown dwarf of a magnetar ? an exotic star with an extremely powerful magnetic field.
They have named the presumed object GCRT J1745-3009.
"GCRT J1745-3009 will cause a stampede of further observations," Shri Kulkarni and Sterl Phinney of the California Institute of Technology wrote in a commentary. "But perhaps even more important is the possibility that the radio heavens contain other fast radio transients (which, in anticipation of a trove of discoveries, we nickname 'burpers')."
Hyman and colleagues made the discovery by studying observations made by the National Science Foundation's Very Large Array radio telescope in New Mexico.
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