Astronomy:NGC 3947

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NGC 3947
NGC 3947 imaged by SDSS
Observation data (J2000 epoch)
ConstellationLeo
Right ascension 11h 53m 20.3285s[1]
Declination+20° 45′ 06.049″[1]
Redshift0.020698[1]
Helio radial velocity6205 ± 2 km/s[1]
Distance314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc)[1]
Group or clusterNGC 3937 Group
Apparent magnitude (V)13.2[1]
Characteristics
Type(R)SB(rs)b[1]
Size~153,100 ly (46.93 kpc) (estimated)[1]
Apparent size (V)1.4′ × 1.2′[1]
Other designations
IRAS 11507+2101, UGC 6863, MCG+04-28-088, PGC 37264[1]

NGC 3947 is a barred spiral galaxy in the constellation of Leo. Its velocity with respect to the cosmic microwave background is 6528 ± 23 km/s, which corresponds to a Hubble distance of 314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc).[1] In addition, three non redshift measurements give a distance of 284.67 ± 12.90 Mly (87.28 ± 3.956 Mpc).[2] It was discovered by German-British astronomer William Herschel on 26 April 1785.[3]

NGC 3947 has a supermassive black hole with an estimated mass of 9.4 × 107 M☉.[4]

Supernovae

Four supernovae have been observed in NGC 3947:

Nearby galaxies

NGC 3947 is a member of the NGC 3937 Group,[13][14] which is part of the Coma Supercluster.[13]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 3947". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3947. 
  2. ↑ "Distance Results for NGC 3947". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3947. 
  3. ↑ Seligman, Courtney. "NGC 3947". https://cseligman.com/text/atlas/ngc39.htm#3947. 
  4. ↑ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami et al. (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal 914 (2): 121. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X. Bibcode: 2021ApJ...914..121A. 
  5. ↑ "SN 1972C". IAU. https://www.wis-tns.org/object/1972C. 
  6. ↑ Kowal, C. T.; Zwicky, F.; Sargent, W. L. W.; Searle, L. (1973). "The 1972 Palomar Supernova Search". Publications of the Astronomical Society of the Pacific 85 (506): 427. doi:10.1086/129482. Bibcode: 1973PASP...85..427K. 
  7. ↑ Li, W. D. (2001). "Supernova 2001P in NGC 3947". International Astronomical Union Circular (7576): 1. Bibcode: 2001IAUC.7576....1L. 
  8. ↑ "SN 2001P". IAU. https://www.wis-tns.org/object/2001P. 
  9. ↑ Lee, E.; Baek, M.; Li, W. (2006). "Supernovae 2006aa, 2006ab, and 2006ac". International Astronomical Union Circular (8669): 1. Bibcode: 2006IAUC.8669....1L. 
  10. ↑ "SN 2006aa". IAU. https://www.wis-tns.org/object/2006aa. 
  11. ↑ Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, M. et al. (2013). "Supernova 2013G in NGC 3947 = PSN J11532132+2044100". Central Bureau Electronic Telegrams (3381): 1. Bibcode: 2013CBET.3381....1H. 
  12. ↑ "SN 2013G". IAU. https://www.wis-tns.org/object/2013G. 
  13. ↑ 13.0 13.1 Gregory, S. A.; Thompson, L. A. (1978-06-15). "The Coma/A1367 supercluster and its environs" (in en). The Astrophysical Journal 222: 784. doi:10.1086/156198. ISSN 0004-637X. http://adsabs.harvard.edu/doi/10.1086/156198. 
  14. ↑ Tully, R. Brent (May 2015). "Galaxy Groups: A 2MASS Catalog" (in en). The Astronomical Journal 149 (5): 171. doi:10.1088/0004-6256/149/5/171. ISSN 0004-6256. https://ui.adsabs.harvard.edu/abs/2015AJ....149..171T/abstract. 

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