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Дата изменения: Sat Nov 6 21:02:14 2004
Дата индексирования: Tue Dec 25 10:28:24 2007
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X-Rays from the Galactic Core
Astronomy Picture of the Day
    


X-Rays from the Galactic Core
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X-Rays from the Galactic Core
Credit: Fred Baganoff (MIT), Mark Morris (UCLA), et al., CXC, NASA
Explanation: Using the orbiting Chandra X-ray Observatory, astronomers have taken this long look at the core of our Milky Way galaxy, some 26,000 light-years away. The spectacular false-color view spans about 130 light-years. It reveals an energetic region rich in x-ray sources and high-lighted by the central source, Sagittarius A*, known to be a supermassive black hole with 3 million times the mass of the Sun. Given its tremendous mass, Sagittarius A* is amazingly faint in x-rays in comparison to central black holes observed in distant galaxies, even during its frequent x-ray flares. This suggests that this supermassive black hole has been starved by a lack of infalling material. In fact, the sharp Chandra image shows clouds of multi-million degree gas dozens of light-years across flanking (upper right and lower left) the central region -- evidence that violent events have cleared much material from the vicinity of the black hole.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: X-ray - Milky Way - Galactic Center - Sgr A - black hole
Publications with words: X-ray - Milky Way - Galactic Center - Sgr A - black hole
See also:
All publications on this topic >>