Astronomy:NGC 7319

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NGC 7319
NGC 7319 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension 22h 36m 03.56s[1]
Declination+33° 58′ 32.7″[1]
Redshift0.022[1]
Helio radial velocity6,740 km/s[2]
Distance311 Mly (95.3 Mpc)[1]
Apparent magnitude (V)14.1[3]
Characteristics
TypeSB(s)bc pec[3]
Size25.09 kiloparsecs (81,800 light-years) (diameter; 25.0 mag/arcsec2 B-band isophote)[3]
Apparent size (V)1′.7 × 1′.3[3]
Other designations
NGC 7319, UGC 12102, PGC 69269[4][3]

NGC 7319 is a highly distorted barred spiral galaxy that is a member of the compact Stephan's Quintet[5] group located in the constellation Pegasus, some 311 megalight-years distant from the Milky Way.[1] It was discovered on 27 September 1873 by French astronomer Édouard Stephan.[6]

The galaxy's arms, dust and gas have been highly disturbed as a result of the interaction with the other members of the Quintet. Nearly all of the neutral hydrogen has been stripped from this galaxy, most likely as a result of a collision with NGC 7320c some 100 million years ago.[7] A pair of long, parallel tidal tails extend southward from NGC 7319 in the direction of NGC 7320c, and is undergoing star formation.[8]

This is a type 2 Seyfert galaxy[1] with one of the largest circumnuclear outflows known in galaxies of this type. This outflow reaches velocities of up to 500 km/s and spans 13 kly. The star formation rate appears normal for a spiral galaxy at 1.98±0.58 M☉ yr−1, and the majority (68%) is occurring in the spiral arms.[8] The core appears faint in the ultraviolet band, indicating heavy extinction within the active galactic nucleus.[8] There is a three component radio source with an overall size of 5.5 kly that is straddling the nucleus.[9] A strong X-ray source with a high redshift has been detected at a separation of 8″ from the galactic nucleus, a quasi-stellar object.[2]

Supernova

One supernova has been observed in NGC 7319: SN 1971P (type unknown, mag. 16.8) was discovered by Leonida Rosino on 19 August 1971.[10][11]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Koss, Michael et al. (October 2011). "Host Galaxy Properties of the Swift Bat Ultra Hard X-Ray Selected Active Galactic Nucleus". The Astrophysical Journal 739 (2): 20. doi:10.1088/0004-637X/739/2/57. 57. Bibcode: 2011ApJ...739...57K. 
  2. ↑ 2.0 2.1 Galianni, Pasquale et al. (February 2005). "The Discovery of a High-Redshift X-Ray-Emitting QSO Very Close to the Nucleus of NGC 7319". The Astrophysical Journal 620 (1): 88–94. doi:10.1086/426886. Bibcode: 2005ApJ...620...88G. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 "NASA/IPAC Extragalactic Database". Results for NGC 7319. http://nedwww.ipac.caltech.edu/. 
  4. ↑ "NGC 7319". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7319. 
  5. ↑ Di Mille, F.; Ciroi, S.; Rafanelli, P.; Moiseev, A. V.; Smirnova, A.; Afanasiev, V. L.; Dodonov, S. N. (October 2008). "3D Spectroscopy of the Nuclear Environment of a Selected Sample of Nearby Active Galactic Nuclei: NGC 7319". in Funes, José G.; J., S.; Corsini, Enrico Maria. Formation and Evolution of Galaxy Disks. Proceedings of the conference held 1–5 October 2007 at the Centro Convegni Matteo Ricci, Rome, Italy. 396. San Francisco: Astronomical Society of the Pacific. p. 61. Bibcode: 2008ASPC..396...61D. 
  6. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7319". https://cseligman.com/text/atlas/ngc73.htm#7319. 
  7. ↑ Moles, M. et al. (August 1997). "The Dynamical Status of Stephan's Quintet". The Astrophysical Journal 485 (2): L69–L73. doi:10.1086/310817. Bibcode: 1997ApJ...485L..69M. 
  8. ↑ 8.0 8.1 8.2 Xu, C. Kevin et al. (January 2005). "Ultraviolet Emission and Star Formation in Stephan's Quintet". The Astrophysical Journal 619 (1): L95–L98. doi:10.1086/425130. Bibcode: 2005ApJ...619L..95X. 
  9. ↑ Aoki, Kentaro et al. (August 1999). "The Radio Emission of the Seyfert Galaxy NGC 7319". The Astrophysical Journal 521 (2): 565–571. doi:10.1086/307559. Bibcode: 1999ApJ...521..565A. 
  10. ↑ Rosino, L. (16 September 1971). "Possible Supernova in NGC 7319". Central Bureau for Astronomical Telegrams (Smithsonian Astrophysical Observatory, IAU) 2355: 1. http://www.cbat.eps.harvard.edu/IAUCs/IAUC2355.png. Retrieved 15 August 2025. 
  11. ↑ "SN 1971P". IAU. https://www.wis-tns.org/object/1971P. 

Coordinates: Sky map 22h 36m 3.5s, +33° 58′ 33″



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