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NGC 5364

NGC 5364
NGC 5364
NGC 5364 imaged with the 24-inch telescope at Mount Lemmon Observatory
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension13h 56m 12.004s[1]
Declination+05° 00′ 52.06″[1]
Redshift1241 ± 4 km/s[2]
Distance54.5 ± 3.9 Mly (16.7 ± 1.2 Mpc)[2]
Apparent magnitude (V)11.2[3]
Characteristics
TypeSA(rs)bc pec[4]
Apparent size (V)6′.1 × 6′.8[5]
Other designations
UGC 8853, PGC 49555, ZWG 46.9, IRAS13536+0515[6]

NGC 5364 is a grand design spiral galaxy located 54.5[2] million light years away in the constellation Virgo. It is inclined to the line of sight from the Earth at an angle of 47° along a position angle of 25°.[7] It is a member of the NGC 5364 Group of galaxies, itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.[8]

Structure

Sometimes called a "grand design", spiral galaxy, it is characterised by their prominent, well-defined arms, which circle outwards from a clear core (HST-image)

The morphological classification of NGC 5364 in the De Vaucouleurs system is SA(rs)bc pec,[4] which indicates it has an incomplete ring structure (rs) in the inner part of the galaxy with moderate to loosely wound arms (bc) and has a peculiar aspect (pec).[5] In particular, the appearance of the spiral arms is amorphous and asymmetrical compared to other galaxies with a similar classification.[4] A companion galaxy, NGC 5363, is located to the north of NGC 5364 and their gravitational interaction may be influencing the peculiar morphology of the latter.[2]

The mid-infrared emission in the nucleus appears weak compared to the spiral arms, suggesting a low rate of star formation in the core region.[4] The inner ring of this galaxy spans a diameter of 22 kly (6.7 kpc) and is located slightly off center with the northern side showing a stronger emission in the hydrogen alpha band compared to the southern half. Multiple H II regions lie along the spiral arms, tracing out their extent.[2] Each of the two main arms wrap all the way around the galaxy, although they display patchiness along much of their length.[5]

NGC designation

This object was discovered by William Herschel on February 2, 1786, and later listed as NGC 5364. It was subsequently rediscovered by John Herschel on April 7, 1828, and later listed as NGC 5317.[9]

References

  1. ^ a b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  2. ^ a b c d e Grouchy, R. D.; et al. (June 2010), "Ring Star Formation Rates in Barred and Nonbarred Galaxies", The Astronomical Journal, 139 (6): 2465–2493, arXiv:1004.5063, Bibcode:2010AJ....139.2465G, doi:10.1088/0004-6256/139/6/2465, S2CID 119099302.
  3. ^ "NASA/IPAC Extragalactic Database". Results for NGC 5364. Retrieved 2007-04-06.
  4. ^ a b c d Bendo, George J.; et al. (June 2002), "An Infrared Space Observatory Atlas of Bright Spiral Galaxies", The Astronomical Journal, 123 (6): 3067–3107, Bibcode:2002AJ....123.3067B, doi:10.1086/340083.
  5. ^ a b c Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, 216, ISBN 978-0-521-82048-6.
  6. ^ Revised NGC Data for NGC 5317
  7. ^ Kennicutt, R. C. Jr. (December 1981), "The shapes of spiral arms along the Hubble sequence", The Astronomical Journal, 86: 1847–1858, Bibcode:1981AJ.....86.1847K, doi:10.1086/113064.
  8. ^ "The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.
  9. ^ Seligman, Courtney. "NGC Objects: NGC 5350 - 5399". cseligman.com. Archived from the original on 10 September 2015. Retrieved 4 July 2015.


Quelle: https://en.wikipedia.org/wiki/NGC_5317