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active galaxy |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.02 sec. |
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active galaxy [′ak·tiv ′gal·ək·sē] (astronomy) A galaxy whose central region exhibits strong emission activity, from radio to x-ray frequencies, probably as a result of gravitational collapse; this category includes M82 galaxies, Seyfert galaxies, N galaxies, and possibly quasars. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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The investigators hope to
detect high-energy neutrinos released in astrophysical events such as
the cataclysmic gravitational collapse of a star or the accretion of
matter in the massive core of an active galaxy. And when
the galaxy is the nearest active galaxy to us, Centaurus A, which also
happens to be one of the strongest and longest studied celestial sources
of radio waves, the combination provides a rather unique excitement for
astronomers. |
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