NGC 3607

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NGC 3607 is a small but fairly bright[1] lenticular galaxy[2] in the equatorial constellation of Leo, about 2.5° south of the prominent star Delta Leonis.[3] The galaxy was discovered March 14, 1784 by William Herschel. Dreyer described it as "very bright, large, round, very much brighter middle, 2nd of 3".[4] It is located at a distance of 73 million light years and is receding with a radial velocity of 930 km/s.[5] The galaxy lies southwest of NGC 3626 at an angular separation of Script error: No such module "val"..[1] It occupies the center of the Leo II Group of galaxies, forming one of its two brightest members – the other being NGC 3608.[2] It is a member of the NGC 3607 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.[6]

The morphological class of NGC 3607 is SA(s)0*,[7] matching a lenticular galaxy (SA0) with no inner ring structure (s). It is an intermediate mass galaxy[2] that is being viewed at an inclination of 34°,[7] showing an ellipticity of 0.13 with the major axis oriented along a position angle of 125°.[2] The galaxy has an outer dusty disk with a second perpendicular disk that is falling inward toward the center of the galaxy.[2] X-ray emission from hot gas has been detected in the interior and from all around the galaxy.[7]

A system of 46 confirmed globular clusters have been identified around NGC 3607, which are orbiting within an effective radius of Script error: No such module "val".. In contrast, the stellar component of the galaxy has an effective radius of Script error: No such module "val"..[2] Orbital motions of this cluster system[8] imply an unusual poverty of dark matter: perhaps Script error: No such module "val". of the total mass within 5 effective radii. Its central black hole has a mass of M = Script error: No such module "val".[9] The core region of the galaxy is kinematically distinct from the remainder of the galaxy and shows an enhancement of magnesium.[7]

References

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External links

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