NGC 5746

From Wikipedia, the free encyclopedia
Jump to: navigation, search
NGC 5746
NGC 5746.jpg
Observation data (J2000 epoch)
Constellation Virgo
Right ascension 14h 44m 55.9s[1]
Declination +01° 57′ 18″[1]
Redshift 1724 ± 10 km/s[1]
Distance 95 Mly[2]
Type SB(r)bc[3]
Apparent dimensions (V) 7′.4 × 1′.[1]
Apparent magnitude (V) 11.0[1]
Other designations
UGC 9499,[1] PGC 52665[1]
See also: Galaxy, List of galaxies

NGC 5746 is a barred spiral galaxy located in the eastern part of the constellation of Virgo, and it can be seen with amateur telescopes.

Characteristics[edit]

NGC 5746 is located at a distance of 95 million light years[2] 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[2] and a currently modest star formation activity.[4]

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 remmant gas of its formation in the process of being accreted;[5] however, later research has shown that cloud does not actually exist.[6]

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.[3]

References[edit]

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 5746. Retrieved 2013-02-21. 
  2. ^ a b c "Best of AOP: NGC 5746.". NOAO. Retrieved 2013-02-21. 
  3. ^ a b Barentine, J. C.; Kormendy, J. (August 2012). "Two Pseudobulges in the "Boxy Bulge" Galaxy NGC 5746". The Astrophysical Journal 754 (2, article id 140). arXiv:1205.6876. Bibcode:2012ApJ...754..140B. doi:10.1088/0004-637X/754/2/140. 
  4. ^ Rasmussen, J.; Sommer-Larsen, J.; Pedersen, K.; Toft, S. et al. (October 2006). "Investigating hot gas in the halos of two massive spirals: Observations and cosmological simulations". 
  5. ^ 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. 
  6. ^ Pedersen, K.; Sommer-Larsen, J.; Rasmussen, J.; Toft, S. et al. (May 2006). "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.