{"id":316167,"date":"2021-08-05T23:10:47","date_gmt":"2021-08-05T20:10:47","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/huge-rings-around-a-black-hole\/"},"modified":"2021-08-05T23:10:47","modified_gmt":"2021-08-05T20:10:47","slug":"huge-rings-around-a-black-hole","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/huge-rings-around-a-black-hole\/","title":{"rendered":"#Huge rings around a black hole"},"content":{"rendered":"

“#Huge rings around a black hole<\/strong>”<\/p>\n

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\n Credit: X-ray: NASA\/CXC\/U.Wisc-Madison\/S. Heinz et al.; Optical\/IR: Pan-STARRS
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This image features a spectacular set of rings around a black hole, captured using NASA’s Chandra X-ray Observatory and Neil Gehrels Swift Observatory. The X-ray images of the giant rings reveal information about dust located in our galaxy, using a similar principle to the X-rays performed in doctor’s offices and airports.<\/p>\n


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The black hole is part of a binary system called V404 Cygni, located about 7,800 light years away from Earth. The black hole is actively pulling material away from a companion star\u2014with about half the mass of the Sun\u2014into a disk around the invisible object. This material glows in X-rays, so astronomers refer to these systems as “X-ray binaries.”<\/p>\n

On June 5, 2015, Swift discovered a burst of X-rays from V404 Cygni. The burst created the high-energy rings from a phenomenon known as light echoes. Instead of sound waves bouncing off a canyon wall, the light echoes around V404 Cygni were produced when a burst of X-rays from the black hole system bounced off of dust clouds between V404 Cygni and Earth. Cosmic dust is not like household dust but is more like smoke, and consists of tiny, solid particles.<\/p>\n

In this composite image, X-rays from Chandra (light blue) were combined with optical data from the Pan-STARRS telescope in Hawaii that show the stars in the field of view. The image contains eight separate concentric rings. Each ring is created by X-rays from V404 Cygni flares observed in 2015 that reflect off different dust clouds. (An artist’s illustration explains how the rings seen by Chandra and Swift were produced. To simplify the graphic, the illustration shows only four rings instead of eight.)<\/p>\n


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