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NGC 3947

Coordinates:Sky map11h 53m 20.3285s, +20° 45′ 06.049″
From Wikipedia, the free encyclopedia
Galaxy in the constellation Leo

NGC 3947
NGC 3947 imaged bySDSS
Observation data (J2000epoch)
ConstellationLeo
Right ascension11h 53m 20.3285s[1]
Declination+20° 45′ 06.049″[1]
Redshift0.020698[1]
Heliocentric radial velocity6205 ± 2 km/s[1]
Distance314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc)[1]
Group orclusterNGC 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+2101,2MASX J11532031+2045055,UGC 6863,MCG +04-28-088,PGC 37264,CGCG 127-095[1]

NGC 3947 is abarred spiral galaxy in theconstellation ofLeo. Its velocity with respect to thecosmic microwave background is 6528 ± 23 km/s, which corresponds to aHubble distance of 314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc).[1] In addition, threenon redshift measurements give a distance of 284.67 ± 12.90 Mly (87.28 ± 3.956 Mpc).[2] It was discovered by German-British astronomerWilliam Herschel on 26 April 1785.[3]

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

Supernovae

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Foursupernovae have been observed in NGC 3947:

Nearby galaxies

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

See also

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References

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  1. ^abcdefghijk"Results for object NGC 3947".NASA/IPAC Extragalactic Database.NASA andCaltech. Retrieved22 August 2024.
  2. ^"Distance Results for NGC 3947".NASA/IPAC EXTRAGALACTIC DATABASE.NASA. Retrieved22 August 2024.
  3. ^Seligman, Courtney."NGC 3947".Celestial Atlas. Retrieved22 August 2024.
  4. ^Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (1 June 2021)."The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc".The Astrophysical Journal.914 (2): 121.arXiv:2101.02716.Bibcode:2021ApJ...914..121A.doi:10.3847/1538-4357/abfcd3.ISSN 0004-637X.
  5. ^"SN 1972C".Transient Name Server.IAU. Retrieved22 August 2024.
  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.Bibcode:1973PASP...85..427K.doi:10.1086/129482.
  7. ^Li, W. D. (2001). "Supernova 2001P in NGC 3947".International Astronomical Union Circular (7576): 1.Bibcode:2001IAUC.7576....1L.
  8. ^"SN 2001P".Transient Name Server.IAU. Retrieved22 August 2024.
  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".Transient Name Server.IAU. Retrieved22 August 2024.
  11. ^Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, M.; McNaught, R. H.; Christensen, E.; Larson, S. M.; Rosi, P.; Tinjaca Ramirez, L. M.; Marion, G. H.; Challis, P.; Berlind, P. (2013). "Supernova 2013G in NGC 3947 = PSN J11532132+2044100".Central Bureau Electronic Telegrams (3381): 1.Bibcode:2013CBET.3381....1H.
  12. ^"SN 2013G".Transient Name Server.IAU. Retrieved22 August 2024.
  13. ^abGregory, S. A.; Thompson, L. A. (15 June 1978)."The Coma/A1367 supercluster and its environs".The Astrophysical Journal.222: 784.doi:10.1086/156198.ISSN 0004-637X.
  14. ^Tully, R. Brent (May 2015)."Galaxy Groups: A 2MASS Catalog".The Astronomical Journal.149 (5): 171.arXiv:1503.03134.Bibcode:2015AJ....149..171T.doi:10.1088/0004-6256/149/5/171.ISSN 0004-6256.

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