Black Holes Essay

605 Words3 Pages
Star-Shredding Black Holes In the article “Star-Shredding Black Holes” by Monica Young provide the information about how the Astrophysicist Suvi Gezari and other astronomers have gathered the most direct evidence yet of a supermassive black hole shredding a star that wandered too close and for the first time, a black hole has been caught in the act of tearing apart and swallowing a star that got too close. The author reports how dormant black holes turn into ravenous beasts when renegade starts waking them up from their slumber. According to Gezari, occasionally a star wanders too close, and that's when a feeding frenzy begins. The start is ripped apart by the gravitational forces. The friction heats the gases and causes them to glow from the stellar gas falling into the black hole over time. The author argues that astronomers discovered the first black hole shredder stars, using the ROSAT satellite, which was launched in 1990 with the objective of survey the low energy X-ray sky. According with her the calculations based on ROSAT observations show that a galaxy’s central black hole might gobble a close passing star every 100,000 years or so. Gezari provides evidence that when a black hole chows down on tidally disrupted debris, the temperature of the inspiraling gas can climb to 1 million degrees. Also, she argues that Most of the light is X-rays, but a tail of emission extends to longer, ultraviolet and optical wavelengths. Other example provided by the author is the Galaxy Evolution Explorer known as GALEX. This is a telescope launched in 2003, observes ultraviolet radiation, but according with Gezari the use of the GALEX to search among galaxies and find tidal disruption was a good idea because the astronomers found the three luminous ultraviolet flares coming from normal-looking galaxies. The author proves that the three flares came from gas glowing at
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