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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] 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.[6] A pair of long, parallel tidal tails extend southward from NGC 7319 in the direction of NGC 7320c, and is undergoing star formation.[7]

NGC 7319
NGC 7319 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension22h 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]
Apparent size (V)1′.7 × 1′.3[3]
Other designations
NGC 7319, UGC 12102, LEDA 69269, PGC 69269[4][3]

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.[7] The core appears faint in the ultraviolet band, indicating heavy extinction within the active galactic nucleus.[7] There is a three component radio source with an overall size of 5.5 kly that is straddling the nucleus.[8] A strong X-ray source with a high redshift has been detected at a separation of 8″ from the galactic nucleus. This quasi-stellar object is most likely being ejected from the host galaxy.[2]


References


  1. 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. arXiv:1107.1237. Bibcode:2011ApJ...739...57K. doi:10.1088/0004-637X/739/2/57. S2CID 118119154. 57.
  2. 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. arXiv:astro-ph/0409215. Bibcode:2005ApJ...620...88G. doi:10.1086/426886. S2CID 757970.
  3. "NASA/IPAC Extragalactic Database". Results for NGC 7319. Retrieved 2007-04-21.
  4. "NGC 7319". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-10-08.
  5. Di Mille, F.; et al. (October 2008). Funes, José G.; J., S.; Corsini, Enrico Maria (eds.). 3D Spectroscopy of the Nuclear Environment of a Selected Sample of Nearby Active Galactic Nuclei: NGC 7319. Formation and Evolution of Galaxy Disks. Proceedings of the conference held 1–5 October 2007 at the Centro Convegni Matteo Ricci, Rome, Italy. ASP Conference Series. Vol. 396. San Francisco: Astronomical Society of the Pacific. p. 61. Bibcode:2008ASPC..396...61D.
  6. Moles, M.; et al. (August 1997). "The Dynamical Status of Stephan's Quintet". The Astrophysical Journal. 485 (2): L69–L73. arXiv:astro-ph/9707194. Bibcode:1997ApJ...485L..69M. doi:10.1086/310817. S2CID 19033219.
  7. Xu, C. Kevin; et al. (January 2005). "Ultraviolet Emission and Star Formation in Stephan's Quintet". The Astrophysical Journal. 619 (1): L95–L98. arXiv:astro-ph/0411319. Bibcode:2005ApJ...619L..95X. doi:10.1086/425130. S2CID 119371650.
  8. Aoki, Kentaro; et al. (August 1999). "The Radio Emission of the Seyfert Galaxy NGC 7319". The Astrophysical Journal. 521 (2): 565–571. arXiv:astro-ph/9812365. Bibcode:1999ApJ...521..565A. doi:10.1086/307559. S2CID 8435704.



На других языках

[de] NGC 7319

NGC 7319 ist eine Balkenspiralgalaxie im Sternbild Pegasus, die etwa 300 Millionen Lichtjahre von der Erde entfernt ist. NGC 7319 ist ein Mitglied der Galaxiengruppe Stephans Quintett. Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxiengruppe gehört zu der Klasse Gruppen von Galaxien.
- [en] NGC 7319

[es] NGC 7319

NGC 7319 es una galaxia espiral barrada perteneciente al Quinteto de Stephan situada en la dirección de la constelación de Pegaso. Posee una magnitud aparente de 13,3, una declinación de +33º 58' 33" y una ascensión recta de 22 horas, 36 minutos y 3,5 segundos.

[ru] NGC 7319

NGC 7319 (другие обозначения — PGC 69269, UGC 12102, IRAS22337+3342, MCG 6-49-41, NPM1G +33.0466, ZWG 514.64, HCG 92C, VV 288, ARP 319) — спиральная галактика с перемычкой, находится в созвездии Пегас.


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