NGC 3947

NGC 3947
NGC 3947 imaged by SDSS
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 53m 20.3285s
Declination+20° 45′ 06.049″
Redshift0.020698
Heliocentric radial velocity6205 ± 2 km/s
Distance314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc)
Group or clusterNGC 3937 Group
Apparent magnitude (V)13.2
Characteristics
Type(R)SB(rs)b
Size~153,100 ly (46.93 kpc) (estimated)
Apparent size (V)1.4′ × 1.2′
Other designations
IRAS 11507+2101, 2MASX J11532031+2045055, UGC 6863, MCG +04-28-088, PGC 37264, CGCG 127-095

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). In addition, three non redshift measurements give a distance of 284.67 ± 12.90 Mly (87.28 ± 3.956 Mpc). It was discovered by German-British astronomer William Herschel on 26 April 1785.

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

Supernovae

Four supernovae have been observed in NGC 3947:

Nearby galaxies

NGC 3947 is a member of the NGC 3937 Group, which is part of the Coma Supercluster.

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 3947". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 22 August 2024.
  2. ↑ "Distance Results for NGC 3947". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 22 August 2024.
  3. ↑ Seligman, Courtney. "NGC 3947". Celestial Atlas. Retrieved 22 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. ↑ 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.
  6. ↑ "SN 1972C". Transient Name Server. IAU. Retrieved 22 August 2024.
  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. Retrieved 22 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. Retrieved 22 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. Retrieved 22 August 2024.
  13. 1 2 Gregory, 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.