NGC 7196 explained

NGC 7196
Epoch:J2000
Ra: [1]
Constellation Name:Indus
Type:E:
Dist Ly:146 ± 48 Mly (45 ± 15 Mpc)
Z:0.009750 ± 0.000063
H Radial V:2,923 ± 19 km/s
Appmag V:11.4
Size V:2.5 × 1.8
Names:ESO 237- G 036, AM 2202-502, PGC 68020

NGC 7196 is an elliptical galaxy registered in the New General Catalogue. It is located in the direction of the Indus constellation, at a distance of circa 150 million light years. It was discovered by the English astronomer John Herschel in 1834 using a 47.5 cm (18.7 inch) reflector.[2] [3] [4] [5]

NGC 7196 appears slightly distorted, with asymmetric outer isophotes. Asymmetry is also observed near the centre. The inner luminosity pattern resembles that of lenticular galaxies with circumscribing dust lanes, except that the feature is extremely close to the center.[6] A shell has been observed around the galaxy. Shells are generally considered to have formed after the accretion of a smaller galaxy by a massive one.[7] It has weak radio wave emission.[8] [9]

NGC 7196 is the foremost member of a galaxy group known as the NGC 7196 group, which also includes NGC 7200 and some dwarf elliptical and irregular galaxies. In the same galaxy cloud lies NGC 7168.[6] [10] NGC 7196 lies in the foreground of galaxy cluster known as Abell S0989.[11]

See also

Notes and References

  1. Web site: NED Search Results for NGC 7196 . NASA/IPAC Extragalactic Database . 2019-01-14.
  2. Web site: Revised NGC Data for NGC 7196. spider.seds.org. 2019-01-14.
  3. Web site: NGC 7196. sim-id. 2019-01-14.
  4. Web site: VizieR. vizier.u-strasbg.fr. 2019-01-14.
  5. Web site: SAO/NASA Astrophysics Data System (ADS). Query Results from the ADS Database. adsabs.harvard.edu. 2019-01-14.
  6. Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  7. Tal . Tomer . van Dokkum . Pieter G. . Nelan . Jenica . Bezanson . Rachel . The Frequency of Tidal Features Associated with Nearby Luminous Elliptical Galaxies From a Statistically Complete Sample . The Astronomical Journal . 1 November 2009 . 138 . 5 . 1417–1427 . 10.1088/0004-6256/138/5/1417. 2009AJ....138.1417T . 0908.1382 . 19104100 .
  8. Sadler . E. M. . Radio and optical observations of a complete sample of E and SO galaxies. III. A radio continuum survey at 2.7 and 5.0 GHz. . The Astronomical Journal . January 1984 . 89 . 53 . 10.1086/113483. 1984AJ.....89...53S .
  9. Sadler . Elaine M. . Jenkins . C. R. . Kotanyi . C. G. . Low-luminosity radio sources in early-type galaxies . Monthly Notices of the Royal Astronomical Society . October 1989 . 240 . 3 . 591–635 . 10.1093/mnras/240.3.591. 1989MNRAS.240..591S . free .
  10. Makarov. Dmitry. Karachentsev. Igor. Galaxy groups and clouds in the local (z~ 0.01) Universe. Monthly Notices of the Royal Astronomical Society. 21 April 2011. 412. 4. 2498–2520. 10.1111/j.1365-2966.2010.18071.x. 2011MNRAS.412.2498M. 1011.6277. 119194025. 19 January 2019. 31 January 2016. https://web.archive.org/web/20160131020344/http://www.sao.ru/hq/dim/groups/galaxies.dat. dead.
  11. Coziol . R. . Andernach . H. . Caretta . C. A. . Alamo-Martínez . K. A. . Tago . E. . The dynamical state of brightest cluster galaxies and the formation of clusters . The Astronomical Journal . 1 June 2009 . 137 . 6 . 4795–4809 . 10.1088/0004-6256/137/6/4795. 2009AJ....137.4795C . 0903.2360 . 119300864 .

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