NGC 3169

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NGC 3169
Up and Over NGC 3169.jpg
NGC 3169 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Sextans
Right ascension 10h 14m 15.099s [1]
Declination +03° 27′ 58.03″ [1]
Redshift +0.004113 ± 0.000017 [2]
Heliocentric radial velocity +1,232 [3] km/s
Distance 57 Mly (17.43 Mpc) [3]
Apparent magnitude  (V)10.3
Characteristics
Type SA(s)a pec [4]
Apparent size  (V)4.2′ × 2.9′
Other designations
UGC 5525, PGC 29855 [4]

NGC 3169 is a spiral galaxy about 75 million light years [3] away in the constellation Sextans. It has the morphological classification SA(s)a pec, [5] which indicates this is a pure, unbarred spiral galaxy with tightly-wound arms and peculiar features. [6] There is an asymmetrical spiral arm and an extended halo around the galaxy. [7] It is a member of the NGC 3166 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. [8]

Contents

This is a LINER 2 galaxy that displays an extended emission of X-rays in the region of the nucleus. [9] A hard X-ray source at the center most likely indicates an active galactic nucleus. [10] The stellar population in the nucleus, and a ring at an angular radius of 6″, shows an age of only one billion years and is generally younger than the surrounding stellar population. This suggests that a burst of star formation took place in the nucleus roughly one billion years ago. [5]

NGC 3169 is located in close physical proximity to NGC 3166, and the two have an estimated separation of around 160 kly (50 kpc). Their interaction is creating a gravitational distortion that has left the disk of NGC 3166 warped. [11] Combined with NGC 3156, the three galaxies form a small group within the larger Leo 1 group. The three are embedded within an extended ring of neutral hydrogen that is centered on NGC 3169. [5]

Supernovae

Two supernovae have been observed in NGC 3169:

References

  1. 1 2 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. ↑ De Vaucouleurs, G.; De Vaucouleurs, A.; Corwin, H. G. Jr.; Buta, R. J.; Paturel, G.; Fouque, P. (1991), Third Reference Catalogue of Bright Galaxies, 3.9.
  3. 1 2 3 Crook, Aidan C.; et al. (February 2007), "Groups of Galaxies in the Two Micron All Sky Redshift Survey", The Astrophysical Journal, 655 (2): 790–813, arXiv: astro-ph/0610732 , Bibcode:2007ApJ...655..790C, doi:10.1086/510201, S2CID   11672751.
  4. 1 2 "NED results for object NGC 3169", NASA/IPAC Extragalactic Database, NASA , retrieved 2013-05-30.
  5. 1 2 3 Sil'chenko, O. K.; Afanasiev, V. L. (August 2006), "Central regions of the early-type galaxies in the NGC 3169 group", Astronomy Letters, 32 (8): 534–544, Bibcode:2006AstL...32..534S, CiteSeerX   10.1.1.515.4412 , doi:10.1134/S1063773706080044, S2CID   53956086.
  6. ↑ Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN   978-0521820486.
  7. ↑ Haynes, M. P. (August 1981), "Neutral hydrogen streams in groups of galaxies. I - Observations", Astronomical Journal, 86: 1126–1154, Bibcode:1981AJ.....86.1126H, doi: 10.1086/112993 .
  8. ↑ "The Leo III Groups". Atlas of the Universe. Archived from the original on July 22, 2012. Retrieved 2010-11-27.
  9. ↑ Terashima, Yuichi; Wilson, Andrew S. (January 2003), "Chandra Snapshot Observations of Low-Luminosity Active Galactic Nuclei with a Compact Radio Source", The Astrophysical Journal, 583 (1): 145–158, arXiv: astro-ph/0209607 , Bibcode:2003ApJ...583..145T, doi:10.1086/345339, S2CID   16047866.
  10. ↑ Mathur, Smita; et al. (October 2008), "AIP Conference Proceedings", American Institute of Physics Conference Series, 1053: 43–49, arXiv: 0807.0422 , Bibcode:2008AIPC.1053...43M, doi:10.1063/1.3009521, S2CID   118424765.
  11. ↑ Drory, Niv; Fisher, David B. (August 2007), "A Connection between Bulge Properties and the Bimodality of Galaxies", The Astrophysical Journal, 662 (2): 640–649, arXiv: 0705.0973 , Bibcode:2007ApJ...664..640D, doi:10.1086/519441, S2CID   17999271.
  12. ↑ Waagen, E.; Evans, R.; Cragg, T.; Aksenov, E. P.; Terebizh, Yu. V.; Metlova, N.; Kozai, Y.; Okazaki, K. (1984). "Supernova in NGC 3169". International Astronomical Union Circular (3931): 1. Bibcode:1984IAUC.3931....1W.
  13. ↑ "SN 1984E". Transient Name Server. IAU . Retrieved 5 December 2024.
  14. ↑ Henry, Richard B. C.; Branch, David (February 1987), "The spectrum of the type II-L supernova 1984E in NGC 3169 Further evidence for a superwind?", Publications of the Astronomical Society of the Pacific, 99: 112–115, Bibcode:1987PASP...99..112H, doi: 10.1086/131962 .
  15. ↑ Nakano, S.; Arbour, R.; Swift, B.; Li, W.; Kushida, Y.; Kushida, R. (2003). "Supernovae 2003cg, 2003ch, and 2003ci". International Astronomical Union Circular (8097): 1. Bibcode:2003IAUC.8097....1N.
  16. ↑ Elias-Rosa, N.; et al. (July 2006), "Anomalous extinction behaviour towards the Type Ia SN 2003cg", Monthly Notices of the Royal Astronomical Society , 369 (4): 1880–1900, arXiv: astro-ph/0603316 , Bibcode:2006MNRAS.369.1880E, doi: 10.1111/j.1365-2966.2006.10430.x , S2CID   15108977.
  17. ↑ "SN 2003cg". Transient Name Server. IAU . Retrieved 5 December 2024.
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