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NGC 4123
NGC 4123 with Legacy Surveys DR10
Observation data (J2000 epoch)
Right ascension12h 08m 11.119s [1]
Declination+02° 52′ 41.78″ [1]
Redshift0.00429±0.00002 [2]
Heliocentric radial velocity1,326 [3] km/s
Distance75 ± 14  Mly (22.9 ± 4.2  Mpc) [4]
Apparent magnitude (V)11.4 [5]
Apparent magnitude (B)13.10 [3]
Characteristics
TypeSBx(rs)ab [6]
Mass/Light ratio2.25 [7]  M☉/ L☉
Apparent size (V)1.900′ × 0.646′ [8] ( NIR)
Other designations
NGC 4123, UGC 7116, PGC 38531, LEDA 38531, Mrk 1466 [9]

NGC 4123 is a modest-sized, [10] strongly- barred spiral galaxy [7] located 75 million light-years [4] away in the equatorial constellation of Virgo. It was discovered February 25, 1784 by William Herschel. [5] This is a member of the Virgo cluster, and it belongs to a group of three galaxies. [11] A companion galaxy, NGC 4116, lies at an angular separation of 14 ′ to the southwest. There is no indication of an interaction between the two galaxies. [7] The third member of the group is NGC 4179. [11]

Hubble Space Telescope image of NGC 4123

The morphological classification of NGC 4123 is SBx(rs)ab, which indicates this is a spiral galaxy with a central X-shaped bar (SBx) encircled by an incomplete ring structure (rs) and moderate to tightly wound spiral arms (ab). The plane of the galaxy is inclined at an angle of 46.9° to the line of sight from the Earth. It lacks a large spheroidal bulge at the core, showing only a luminous point-like source. [10] Blue knots in the outer spiral arms indicate that star formation is ongoing. [7] The galaxy has a stellar mass of 1.95×1010  M☉ [6] with a star formation rate of 3.429±3.281 M☉·yr−1. [12] The atomic gas in the galaxy has a mass of 1.06×1010 M☉. [10]

Radio emission has been detected from an HII nucleus, which is consistent with it having a weak active galactic nucleus. [13] If there is a supermassive black hole at the core, it has an estimated mass of 107 M☉. [14]

References

  1. ^ a b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ Abazajian, Kevork N.; et al. (2009), "The Seventh Data Release of the Sloan Digital Sky Survey", The Astrophysical Journal Supplement Series, 182 (2): 543–558, arXiv: 0812.0649, Bibcode: 2009ApJS..182..543A, doi: 10.1088/0067-0049/182/2/543, S2CID  14376651.
  3. ^ a b Voyer, E. N.; et al. (September 2014), "The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). III. The ultraviolet source catalogs", Astronomy & Astrophysics, 569: A124, arXiv: 1405.4344, Bibcode: 2014A&A...569A.124V, doi: 10.1051/0004-6361/201322511, S2CID  118455940, A124.
  4. ^ a b Haynes, Martha P.; et al. (July 2018), "The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic H I Source Catalog", The Astrophysical Journal, 861 (1): 49, arXiv: 1805.11499, Bibcode: 2018ApJ...861...49H, doi: 10.3847/1538-4357/aac956, 49.
  5. ^ a b Seligman, Courtney, "NGC Objects: NGC 4100 - 4149", Celestial Atlas, retrieved 2023-11-04.
  6. ^ a b Díaz-García, S.; et al. (October 2021), "Molecular gas and star formation within 12 strong galactic bars observed with IRAM-30 m", Astronomy & Astrophysics, 654: A135, arXiv: 2106.13099, Bibcode: 2021A&A...654A.135D, doi: 10.1051/0004-6361/202140674, S2CID  235624019, A135.
  7. ^ a b c d Weiner, Benjamin J.; Williams, T. B.; van Gorkom, J. H.; Sellwood, J. A. (January 2001), "The Disk and Dark Halo Mass of the Barred Galaxy NGC 4123. I. Observations", The Astrophysical Journal, 546 (2): 916–930, arXiv: astro-ph/0008204, Bibcode: 2001ApJ...546..916W, doi: 10.1086/318288, S2CID  13742393.
  8. ^ Skrutskie, Michael F.; et al. (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.
  9. ^ "NGC 4123", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2023-11-03.
  10. ^ a b c Weiner, Benjamin J.; et al. (January 2001), "The Disk and Dark Halo Mass of the Barred Galaxy NGC 4123. II. Fluid-Dynamical Models", The Astrophysical Journal, 546 (2): 931–951, arXiv: astro-ph/0008205, Bibcode: 2001ApJ...546..931W, doi: 10.1086/318289, S2CID  119068977.
  11. ^ a b Kim, Suk; Rey, Soo-Chang; Jerjen, Helmut; Lisker, Thorsten; Sung, Eon-Chang; Lee, Youngdae; Chung, Jiwon; Pak, Mina; Yi, Wonhyeong; Lee, Woong (December 2014), "The Extended Virgo Cluster Catalog", The Astrophysical Journal Supplement, 215 (2): 22, arXiv: 1409.3283, Bibcode: 2014ApJS..215...22K, doi: 10.1088/0067-0049/215/2/22, S2CID  119296675, 22.
  12. ^ Lianou, S.; et al. (November 2019), "Dust properties and star formation of approximately a thousand local galaxies", Astronomy & Astrophysics, 631: A38, arXiv: 1906.02712, Bibcode: 2019A&A...631A..38L, doi: 10.1051/0004-6361/201834553, S2CID  174801441, A38.
  13. ^ Ulvestad, James S.; Ho, Luis C. (December 2002), "A Search for Active Galactic Nuclei in Sc Galaxies with H II Spectra", The Astrophysical Journal, 581 (2): 925–931, arXiv: astro-ph/0208460, Bibcode: 2002ApJ...581..925U, doi: 10.1086/344442, S2CID  15482628.
  14. ^ Dong, X. Y.; De Robertis, M. M. (March 2006), "Low-Luminosity Active Galaxies and Their Central Black Holes", The Astronomical Journal, 131 (3): 1236–1252, arXiv: astro-ph/0510694, Bibcode: 2006AJ....131.1236D, doi: 10.1086/499334, S2CID  17630682.

Further reading

  • Weiner, B. J.; et al. (1996), Buta, R.; et al. (eds.), "Fabry-Perot Observations and Hydrodynamical Simulations of the Barred Spiral NGC 4123", Barred galaxies; Proceedings of a conference held at the University of Alabama; Tuscaloosa; Alabama; 30 May - 3 June 1995, Astronomical Society of the Pacific Conference Series, vol. 91, San Francisco: Astronomical Society of the Pacific, p. 489, Bibcode: 1996ASPC...91..489W.
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