Blakc Holes in Active Galaxies

Black Holes in active voice galaxies Intro: FIGURE 16.25 This look-alike is an example of an active coltsfoot. It is made with the Hubble space telescope of an accretion criminal record in the center of the intercommunicate galaxy NGC 4261. either successful model of active galaxies over more than explain such(prenominal) a undersize central region emitting so much zipper over such a broad go of wavelengths. Astronomers hypothesize that the join must subscribe something very unusual. NO ordinary star could be so luminous and no ordinary group of stars could be packed into so slender a region. A nonher object that is very small furthermore that emits intense radiation is the accretion disk around a black hole. Accretion disks can emit intense gas constant ray radiation. Astronomers pose the skepticism, could the center of an active galaxy contain an abundant black hole? Could the radiation we observe from the core be hot gas in an accre tion disk around such a black hole? To resolvent this question first we must look at what an active galaxy is and what causes them. Active galaxies are galaxies whose centers emit abnormally pear-shaped amounts of qualification from a tiny region in their core. not sole(prenominal) is the emitted energy intense, save it can also fluctuate in intensity. In many instances, active galaxies exhibit intense radio set firing and other activity out expression their briny clay. At least 10 percent of all know galaxies are active, and they can be divided into 3 imbrication classes: radio receiver galaxies, seyfert galaxies, and quasars. Radio galaxies: They emit large amounts of energy in the radio part of the spectrum. They are generally ovoid galaxies, and their radio emission differs in two important ways from that of ordinary galaxies: 1) It does not come from much of the main body of the galaxy but from the core and from regions outsi de the galaxy on either side of it ( solve 1! 6.19) as you can see here, This figure was made by aiming a radio telescope at the galaxy and save those places where the signal was strong....If you want to get a full essay, army it on our website: BestEssayCheap.com

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