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More Images: Astronomers Dig Out Buried Black Holes With NASA's Chandra
1
X-ray & Optical Images of XBONGs
(Credit: X-ray: NASA/CXC/SAO/D. Kim et al.; Optical/IR: Legacy Surveys/D. Lang (Perimeter Institute))
Click for large jpg J011522.18 &
J155627.74
X-ray & Optical
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Click for large jpg J011522.18 &
J155627.74
X-ray & Optical
(Labeled)
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Click for large jpg J011522.18
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Click for large jpg J155627.74
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Click for large jpg J011522.18
Optical
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Click for large jpg J155627.74
Optical
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Click for large jpg J011522.18
X-ray & Optical
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Click for large jpg J011522.18
X-ray & Optical
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Click for large jpg J155627.74
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Click for large jpg J155627.74
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Click for large jpg J102155.55
X-ray & Optical
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Click for large jpg J102155.55
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Click for large jpg J102155.55
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A survey has revealed hundreds of previously unidentified black holes using data from the Chandra Source Catalog and the Sloan Digitized Sky Survey (SDSS). Researchers compared the X-ray and optical data for a class of objects known as “XBONGs” (X-ray bright, optically normal galaxies) to reveal about 400 supermassive black holes. These graphics show these XBONGs in X-rays from Chandra and optical light from SDSS. This result helps explain some unusual properties of XBONGs as well as provide a more accurate census of supermassive black holes that exist in the centers of most large galaxies.


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