NGC 7590

NGC 7590
NGC 7590 is on the right
Observation data (J2000 epoch)
ConstellationGrus
Right ascension23h 18m 54.827s.[1]
Declination−42° 14′ 20.574″[1]
Redshift0.005255[1]
Heliocentric radial velocity1575 ± 5 km/s[1]
Distance84.5 ± 3.986 Mly
(25.908 ± 1.222 Mpc)[1]
Group or clusterGrus Quartet
Apparent magnitude (V)11.37[1]
Characteristics
TypeSA(rs)bc?[1]
Size~83,700 ly (25.65 kpc) (estimated)[1]
Apparent size (V)5.0′ × 2.1′[1]
Other designations
ESO 347- G 033, IRAS 23161-4230, 2MASX J23185483-4214206, MCG -07-47-030, PGC 71031[1]

NGC 7590 is a spiral galaxy in the constellation Grus. This galaxy is in the upper middle west part of the Virgo Supercluster.[1] Its velocity with respect to the cosmic microwave background is 1333 ± 18 km/s, which corresponds to a Hubble distance of 64.1 ± 4.6 Mly (19.66 ± 1.40 Mpc).[1] However, 12 non-redshift measurements give a distance of 84.50 ± 3.99 Mly (25.908 ± 1.222 Mpc).[2] NGC 7590 was discovered by Scottish astronomer James Dunlop on 14 July 1826.[3]

The SIMBAD database lists NGC 7590 as a Seyfert I Galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4] While the neighboring NGC 7599 is marginally brighter, NGC 7590 is easier to identify due to its bright Seyfert core and an adjacent star of 13th magnitude.[5]

Galaxy groups

According to A. M. Garcia, NGC 7590 is a member of the NGC 7582 group (also known as LGG 472). This group of galaxies contains at least 9 members. The other galaxies are NGC 7496, NGC 7531, NGC 7552, NGC 7582, NGC 7599, NGC 7632, IC 5325, and ESO 291-24.[6]

NGC 7590 also belongs a group known as the Grus quartet. Other members of the group include the spiral galaxies NGC 7552, NGC 7582, and NGC 7599.[7] A large tidal extension of HI reaches from NGC 7582 to NGC 7552, which is indicative of interactions between the group members,[7] yet NGC 7552 does not have highly disturbed morphology.[8]

See also

References

  1. ^ a b c d e f g h i j k l "NASA/IPAC Extragalactic Database". Results for NGC 7590. Retrieved January 7, 2017.
  2. ^ "Distance Results for NGC 7590". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 21 November 2024.
  3. ^ Courtney Seligman. "Celestial Atlas Table of Contents, NGC 7550 - 7599"..
  4. ^ "NGC 7590". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 November 2024.
  5. ^ O'Meara 2013, p. 428.
  6. ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  7. ^ a b Freeland, E.; Stilp, A.; Wilcots, E. (1 July 2009). "H I Observations of Five Groups of Galaxies". The Astronomical Journal. 138 (1): 295–304. arXiv:0905.3907. Bibcode:2009AJ....138..295F. doi:10.1088/0004-6256/138/1/295. S2CID 15714969.
  8. ^ Wood, Corey M.; Tremonti, Christy A.; Calzetti, Daniela; Leitherer, Claus; Chisholm, John; Gallagher, John S. (25 July 2015). "Supernova-driven outflows in NGC 7552: a comparison of H α and UV tracers". Monthly Notices of the Royal Astronomical Society. 452 (3): 2712–2730. arXiv:1507.00346. Bibcode:2015MNRAS.452.2712W. doi:10.1093/mnras/stv1471. S2CID 118422451.

Sources

  • Media related to NGC 7590 at Wikimedia Commons