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NGC 5746

NGC 5746
NGC 5746 imaged by the Liverpool Telescope
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension14h 44m 55.918s[1]
Declination+01° 57′ 18.011″[1]
Redshift0.005764[1]
Heliocentric radial velocity1728 ± 2 km/s[1]
Distance99 Mly[2]
Group or clusterNGC 5746 Group (LGG 386)
Apparent magnitude (V)11.0[1]
Characteristics
TypeSAB(rs)b? edge-on[1]
Size~194,300 ly (59.56 kpc) (estimated)[1]
Apparent size (V)7.4′ × 1′.[1]
Other designations
IRAS 14424+0209, UGC 9499, MCG +00-38-005, PGC 52665, CGCG 020-012[1]

NGC 5746 (also known as the Mini Sombrero Galaxy[3][4]) is a barred spiral galaxy located in the eastern part of the constellation of Virgo. It was discovered on 24 February 1786 by German-British astronomer William Herschel.[5] It is the lead member of the NGC 5746 Group of galaxies (also known as LGG 386), itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.[6]

Characteristics

NGC 5746 is located at a distance of 99 million light years[7] and is seen nearly edge-on, bearing a strong resemblance with the galaxy NGC 4565, that is also seen nearly edge-on.

Galaxy NGC 5746, by HST

As with the former, it has a box-shaped bulge that is actually a bar seen from one side[7] and a currently modest star formation activity.[8]

Investigations with the help of the x-ray space telescope Chandra seemed to detect a large cloud of gas surrounding NGC 5746 that was thought to be remnant gas of its formation in the process of being accreted;[9] however, later research has shown that cloud does not actually exist.[10]

Seen in the infrared, NGC 5746 also shows two pseudobulges, one nested within the other – that coincides with its central bar – as well as an inner ring with a radius of 9.1 kiloparsecs and a width of 1.6 kiloparsecs.[11]

One supernova has been observed in NGC 5746: SN 1983P (type Ia, mag. 13).[12]

See also

References

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 5746. Retrieved 2024-09-08.
  2. ^ "Best distance estimate from Cosmic Flows 3 Individual Galaxy Info for UGC09499". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2 October 2021.
  3. ^ "Interactive Star Charts, Planets, Meteors, Comets, Telescopes". Astronomy Magazine. 2022-06-27. Retrieved 2024-06-10.
  4. ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  5. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 5746". Celestial Atlas. Retrieved 8 September 2024.
  6. ^ "The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.
  7. ^ a b "Best of AOP: NGC 5746". NOAO. Retrieved 2013-02-21.
  8. ^ Rasmussen, Jesper; Sommer-Larsen, Jesper; Pedersen, Kristian; Toft, Sune; Benson, Andrew; Bower, Richard G.; Grove, Lisbeth F. (20 May 2009). "Hot gas halos around disk galaxies: Confronting cosmological simulations with observations". The Astrophysical Journal. 697 (1): 79–93. arXiv:0903.0665. doi:10.1088/0004-637X/697/1/79.
  9. ^ Pedersen, K.; Sommer-Larsen, J.; Rasmussen, J.; Toft, S.; et al. (May 2006). "Discovery of a very extended X-ray halo around a quiescent spiral galaxy The "missing link" of galaxy formation". New Astronomy. 11 (7): 465–470. arXiv:astro-ph/0511682. Bibcode:2006NewA...11..465P. doi:10.1016/j.newast.2005.11.004. S2CID 53473787.
  10. ^ Pedersen, K.; Sommer-Larsen, J.; Rasmussen, J.; Toft, S.; et al. (2009). "Hot Gas Halos Around Disk Galaxies: Confronting Cosmological Simulations with Observations". The Astrophysical Journal. 697 (1): 79–93. arXiv:0903.0665. Bibcode:2009ApJ...697...79R. doi:10.1088/0004-637x/697/1/79. S2CID 17934428.
  11. ^ Barentine, J. C.; Kormendy, J. (August 2012). "Two Pseudobulges in the "Boxy Bulge" Galaxy NGC 5746". The Astrophysical Journal. 754 (2, article id 140): 140. arXiv:1205.6876. Bibcode:2012ApJ...754..140B. doi:10.1088/0004-637X/754/2/140. S2CID 119298870.
  12. ^ "SN 1983P". Transient Name Server. IAU. Retrieved 8 September 2024.
  • Media related to NGC 5746 at Wikimedia Commons
Quelle: https://en.wikipedia.org/wiki/NGC_5746