violent galaxy Comparison Table

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physical object > natural object > celestial body > collection of stars > galaxy > emission line galaxy > violent galaxy

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violent galaxy comparison table

Subject has location has material has spectra is a kind of has catalog has volume has temperature has number of star has acronym has velocity has redshift has momentum has synonym has extent has mass has emission line has luminosity has definition has angular momentum

quasar or center of gravity violent galaxy quasar catalog 10⁶ to 10¹² QSO large exploding galaxy very large An object with a dominant starlike (i.e., diameter less than 1") component, with an emission line spectrum showing a large redshift - up to z = 3.53 (0.91c) for OQ 172. (The largest redshift known for a normal radio galaxy is z = 0.637 for 3C 123.) Many have multiple absorption redshifts; a few have multiple emission redshifts. (Bahcall system: class I, z_abs ≈ z_em; class II, z_abs significantly less than z_em.) The light of most if not all quasars is variable over time intervals between a few days and several years, so their diameters must not be much larger than the diameter of the solar system; yet they are the intrinsically brightest objects known (for 3C 273 (z = 0.158), M_v = -27.5 if its redshift is cosmological). The energy output of a typical quasar at "cosmological" distance is of the order of 10⁴⁷ ergs per second - which would require a mass of 10¹⁰ M_sun if it derives its energy solely from nuclear fusion. (Energy requirement under the "local" hypothesis is on the order of 10⁴² ergs per second.) The basic problem of quasars is that they emit too much radiation in too short a time from too small an area.

Subject	has location	has material	has spectra	is a kind of	has catalog	has volume	has temperature	has number of star	has acronym	has velocity	has redshift	has momentum	has synonym	has extent	has mass	has emission line	has luminosity	has definition	has angular momentum
quasar	or center of gravity			violent galaxy	quasar catalog			10⁶ to 10¹²	QSO		large		exploding galaxy				very large	An object with a dominant starlike (i.e., diameter less than 1") component, with an emission line spectrum showing a large redshift - up to z = 3.53 (0.91c) for OQ 172. (The largest redshift known for a normal radio galaxy is z = 0.637 for 3C 123.) Many have multiple absorption redshifts; a few have multiple emission redshifts. (Bahcall system: class I, z_abs ≈ z_em; class II, z_abs significantly less than z_em.) The light of most if not all quasars is variable over time intervals between a few days and several years, so their diameters must not be much larger than the diameter of the solar system; yet they are the intrinsically brightest objects known (for 3C 273 (z = 0.158), M_v = -27.5 if its redshift is cosmological). The energy output of a typical quasar at "cosmological" distance is of the order of 10⁴⁷ ergs per second - which would require a mass of 10¹⁰ M_sun if it derives its energy solely from nuclear fusion. (Energy requirement under the "local" hypothesis is on the order of 10⁴² ergs per second.) The basic problem of quasars is that they emit too much radiation in too short a time from too small an area.

Next emission line galaxy: Haro galaxy Up: emission line galaxy Previous emission line galaxy: narrow emission line X-ray galaxy