NGC 5746 explained

NGC 5746
Epoch:J2000
Type:SB(r)bc
Ra:[1]
Dist Ly:99 Mly[2]
Z:1724 ± 10 km/s
Appmag V:11.0
Size V:7.4 × 1.
Constellation Name:Virgo
Names:UGC 9499, PGC 52665

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 is a member of the NGC 5746 Group of galaxies, itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.[5]

Characteristics

NGC 5746 is located at a distance of 99 million light years[6] and is seen nearly edge-on, bearing a strong resemblance with the galaxy NGC 4565, that is also seen nearly edge-on.

As with the former, it has a box-shaped bulge that is actually a bar seen from one side[6] and a currently modest star formation activity.[7]

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;[8] however, later research has shown that cloud does not actually exist.[9]

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.[10]

One supernova has been observed in NGC 5746: SN 1983P (type Ia, mag. 13).[11]

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 5746 . 2013-02-21 .
  2. Web site: Best distance estimate from Cosmic Flows 3 Individual Galaxy Info for UGC09499 . NASA/IPAC Extragalactic Database . California Institute of Technology . 2 October 2021.
  3. Web site: Interactive Star Charts, Planets, Meteors, Comets, Telescopes . Astronomy Magazine . 2022-06-27 . 2024-06-10.
  4. Book: Stoyan, Ronald. Schurig. Stephan. interstellarum Deep Sky Atlas. Cambridge University Press; Oculum-Verlag GmbH. Erlangen. 2014. 978-1-107-50338-0. 920437579.
  5. Web site: The Virgo III Groups . Atlas of the Universe . 2010-11-27 .
  6. Web site: Best of AOP: NGC 5746. . NOAO . 2013-02-21.
  7. Rasmussen . Jesper . Sommer-Larsen . Jesper . Pedersen . Kristian . Toft . Sune . Benson . Andrew . Bower . Richard G. . Grove . Lisbeth F. . Hot gas halos around disk galaxies: Confronting cosmological simulations with observations . The Astrophysical Journal . 20 May 2009 . 697 . 1 . 79–93 . 10.1088/0004-637X/697/1/79. 0903.0665 .
  8. Pedersen . K. . Sommer-Larsen . 4 . J. . Rasmussen . J. . Toft . S. . Benson . A. . Bower . R. G. . May 2006 . New Astronomy . 11 . 7 . 465–470 . Discovery of a very extended X-ray halo around a quiescent spiral galaxy The "missing link" of galaxy formation . astro-ph/0511682 . 2006NewA...11..465P . 10.1016/j.newast.2005.11.004 . 53473787 .
  9. Pedersen . K. . Sommer-Larsen . 4 . J. . Rasmussen . J. . Toft . S. . Benson . A. . Bower . R. G. . 2009 . The Astrophysical Journal . 697 . 1 . 79–93 . Hot Gas Halos Around Disk Galaxies: Confronting Cosmological Simulations with Observations . 10.1088/0004-637x/697/1/79 . 2009ApJ...697...79R. 0903.0665 . 17934428 .
  10. Barentine . J. C. . Kormendy . J. . August 2012 . The Astrophysical Journal . 754 . 2, article id 140 . Two Pseudobulges in the "Boxy Bulge" Galaxy NGC 5746 . 10.1088/0004-637X/754/2/140 . 2012ApJ...754..140B. 1205.6876 . 140. 119298870 .
  11. https://www.wis-tns.org/object/1983P Transient Name Server entry for SN 1983P.

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