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Superheated Quasar

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Last Updated: 18 January 2022

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Quasars are some of most powerful objects in Universe. They were first discovered in 1950s as bright radio sources coming from almost point - like objects. They were given name Quasi - stellar sources, or quasars for short. We now know that they are powered by supermassive black holes at center of distant galaxies. It is not black holes themselves that emit so much light, rather superheated material surrounding black hole. As material is pulled ever closer to black hole, it is squeezed and heat tremendously, which causes it to emit light across electromagnetic spectrum. Single Supermassive Black Hole Powers Most Quasars, Which Makes Sense, Because Binary Black Holes Tend To Sweep Material From Their Common Region. Without closely surrounding material, binary system isnt likely to become quasar. At least that what astronomers generally think. But as astronomers develop sophisticated computer simulations of accreting black holes, they find there are cases where two close - orbiting supermassive black holes could form common accretion disk that could power quasar. We have long known that merging galaxies can their black holes to form close binaries, so there should be binary black hole quasars. Proving this is easy. While computer simulations show they should they would still be rare. Finding one takes not only high - resolution imaging but ability to analyze thousands of binary quasar candidates. Recently, team successfully found one. Using Hyper Suprime - Cam camera on Suburu Telescope, they looked at nearly 000 known quasars from Sloan Digital Sky Survey. After combing through they found just 421 potential binaries. They capture HSC of each of them, locating one strong candidate. They also image this Galaxy with Gemini Telescope, confirming it as binary system. One of black holes has mass of about 80 million Suns, while other is about 200 million solar masses. Base on this survey, team estimates binary black holes power only about 0. 3 percentage of quasars. But despite their small numbers, such quasars could provide deeper understanding of how galaxies evolve in Universe and role black holes play.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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