NGC 7319

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]
Heliocentric 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]

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]

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

  1. ^ a b c d e f Cite error: The named reference Koss2011 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Galianni2005 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference ned was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference diMille2008 was invoked but never defined (see the help page).
  6. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7319". Celestial Atlas. Retrieved 28 August 2024.
  7. ^ Cite error: The named reference Moles1997 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Xu2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Aoki1999 was invoked but never defined (see the help page).
  10. ^ Transient Name Server entry for SN 1971P. Retrieved 25 March 2023.