Falling into a black hole.Falling into a black hole The current standard theory of quasars Proper naming of quasars are by Catalogue Entry, Qxxxx±yy using B1950 coordinates, or QSO Jxxxx±yyyy using J2000 coordinates. This page lists quasars.
adj. Located or originating beyond the Milky Way. Adj. 1. extragalactic - outside or beyond a galaxy; "extragalactic nebula" objects have black holes at their centers. The extremely high flux of radiation coming out of a quasar is generated by the gravitational energy of matter falling into the black hole. Plenty of secondary evidence supports this picture. Now Martin Gaskell of Ohio State University Ohio State University, main campus at Columbus; land-grant and state supported; coeducational; chartered 1870, opened 1873 as Ohio Agricultural and Mechanical College, renamed 1878. There are also campuses at Lima, Mansfield, Marion, and Newark. in Columbus presents what seems to be the first direct evidence for gas falling into a black hole. The evidence comes from studies of the spectra taken by the International Ultraviolet Explorer International Ultraviolet Explorer: see ultraviolet astronomy. satellite of the radiation from a gas cloud in the galaxy NGC NGC New General Catalogue (of Nebulae and Star Clusters; astronomy) NGC National Geographic Channel (TV) NGC National Guideline Clearinghouse 4151. Analysis of the details of the shapes of the lines in these spectra show that the predominant motion of the cloud is inward, Gaskell says. He believes he can exclude outflow to a 99.9 percent confidence limit. From knowledge of this inflow he can estimate the mass of the black hole at 60 million times that of the sun. It may be the center of a very weak quasar, he says, and he concludes, "Accretion [of matter] on black holes in quasars is now on an observational footing." |
|
||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion