NGC 5161

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NGC 5161
NGC 5161 imaged by legacy surveys
Observation data (J2000 epoch)
ConstellationCentaurus
Right ascension13h 29m 13.9170s[1]
Declination−33° 10′ 26.056″[1]
Redshift0.007969±0.000002[1]
Heliocentric radial velocity2,389±1 km/s[1]
Distance74.15 ± 2.53 Mly (22.736 ± 0.777 Mpc)[1]
Apparent magnitude (V)12.0[1]
Characteristics
TypeSA(s)c[1]
Apparent size (V)5.6′ × 2.2′[1]
Other designations
ESO 383- G 004, IRAS 13264-3255, UGCA 359, MCG -05-32-031, PGC 47321[1]

NGC 5161 is a spiral galaxy in the constellation Centaurus. Its velocity with respect to the cosmic microwave background is 2,668±20 km/s, which corresponds to a Hubble distance of 128.4 ± 9.0 Mly (39.36 ± 2.77 Mpc).[1] However, 28 non-redshift measurements give a much closer mean distance of 74.15 ± 2.53 Mly (22.736 ± 0.777 Mpc).[2] It was discovered by British astronomer John Herschel on 3 June 1836.[3]

Characteristics

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The plane of the galactic disk is inclined at an angle of 68° to the line of sight from the Earth.[4] The galaxy has a faint bar which near its ends, were the spiral arms begin, has ansae. The galaxy has two spiral arms which can be followed for more than 180 degrees. The arms are patchy and fragmented[5] and feature small star forming areas visible in H alpha. There is also H alpha emission from the nucleus.[6] In near infrared the bulge appears more pronounced and the outer arms have low surface brightness.[5]

The stellar mass of the galaxy is estimated to be 1010.5 M☉.[4] In the centre of the galaxy is predicted to lie a supermassive black hole whose mass is estimated to be between 1.2 and 7.2 million solar masses, based on the spiral arm pitch angle.[7]

Supernovae

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Two supernovae have been observed in NGC 5161:

  • SN 1974B (type unknown, mag. 14.5) was discovered by Charles Kowal on 28 January 1974.[8][9][10]
  • SN 1998E (Type IIn, mag. 16.5) was discovered by the Perth Astronomical Research Group on 29 January 1998.[11][12]

Nearby galaxies

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NGC 5161 belongs to the NGC 5188 group. Other members of the group include NGC 5188, ESO 382-066, and ESO 383-035.[13]

See also

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References

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  1. ^ a b c d e f g h i j "Results for object NGC 5161". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2007-04-03.
  2. ^ "Distance Results for NGC 5161". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 16 August 2025.
  3. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 5161". Celestial Atlas. Retrieved 16 August 2025.
  4. ^ a b Lutz, K A; Kilborn, V A; Koribalski, B S; Catinella, B; Józsa, G I G; Wong, O I; Stevens, A R H; Obreschkow, D; Dénes, H (21 May 2018). "The H ix galaxy survey – II. H i kinematics of H i eXtreme galaxies". Monthly Notices of the Royal Astronomical Society. 476 (3): 3744–3780. arXiv:1802.04043. doi:10.1093/mnras/sty387.
  5. ^ a b Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv:astro-ph/0206320. Bibcode:2002ApJS..143...73E. doi:10.1086/342340.
  6. ^ Schmitt, H. R.; Calzetti, D.; Armus, L.; Giavalisco, M.; Heckman, T. M.; Kennicutt, Jr., R. C.; Leitherer, C.; Meurer, G. R. (May 2006). "Multiwavelength Star Formation Indicators: Observations". The Astrophysical Journal Supplement Series. 164 (1): 52–80. arXiv:astro-ph/0602063. doi:10.1086/501529.
  7. ^ Davis, Benjamin L.; Berrier, Joel C.; Johns, Lucas; Shields, Douglas W.; Hartley, Matthew T.; Kennefick, Daniel; Kennefick, Julia; Seigar, Marc S.; Lacy, Claud H. S. (20 June 2014). "THE BLACK HOLE MASS FUNCTION DERIVED FROM LOCAL SPIRAL GALAXIES". The Astrophysical Journal. 789 (2): 124. arXiv:1405.5876. doi:10.1088/0004-637X/789/2/124.
  8. ^ Schmidt, M.; Kowal, C. T. (26 February 1974). "Supernova in NGC 5161". Central Bureau for Astronomical Telegrams. 2640. Smithsonian Astrophysical Observatory, IAU: 1. Retrieved 16 August 2025.
  9. ^ Kowal, C. T.; Sargent, W. L. W.; Huchra, J. (1975). "The 1974 Palomar supernova search". Publications of the Astronomical Society of the Pacific. 87: 401. Bibcode:1975PASP...87..401K. doi:10.1086/129781.
  10. ^ "SN 1974B". Transient Name Server. IAU. Retrieved 2 December 2024.
  11. ^ Woodings, S.; Martin, R.; Williams, A.; Suntzeff, N.; Ruiz, M. -T. (1998). "Supernova 1998E in NGC 5161". International Astronomical Union Circular (6817): 1. Bibcode:1998IAUC.6817....1W.
  12. ^ "SN 1998E". Transient Name Server. IAU. Retrieved 2 December 2024.
  13. ^ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society. 412 (4): 2498–2520. arXiv:1011.6277. Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID 119194025. Retrieved 1 February 2025.
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