NGC 3840

NGC 3840 is a spiral galaxy[2] located about 320 million light-years away[3] in the constellation Leo.[4] The galaxy was discovered by astronomer Heinrich d'Arrest on May 8, 1864.[5] NGC 3840 is a member of the Leo Cluster.[6][7][8] The galaxy is rich in neutral atomic hydrogen (H I) and is not interacting with its environment.[9]

NGC 3840
SDSS image of NGC 3840
Observation data (J2000 epoch)
Constellation	Leo
Right ascension	11^h 43^m 58.9^s[1]
Declination	20° 04′ 37″[1]
Redshift	0.024590[1]
Helio radial velocity	7372 km/s[1]
Distance	318 Mly (97.5 Mpc)[1]
Group or cluster	Leo Cluster
Apparent magnitude (V)	14.54[1]
Characteristics
Type	Sa[1]
Size	~105,400 ly (32.32 kpc) (estimated)[1]
Apparent size (V)	1.1 x 0.8[1]
Other designations
CGCG 97-91, IRAS 11413+2021, MCG 3-30-70, PGC 36477, UGC 6702[1]

NGC 3840 is likely to be a low-luminosity AGN (LLAGN).[10]

See also

• List of NGC objects (3001–4000)
• UGC 6697-edge on spiral galaxy in the Leo Cluster

References

1. "NASA/IPAC Extragalactic Database". Results for NGC 3840. Retrieved 2018-07-12.
2. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-07-12.
3. "NED Query Results for NGC 3840". ned.ipac.caltech.edu. Retrieved 2018-07-12.
4. "Revised NGC Data for NGC 3840". spider.seds.org. Retrieved 2018-07-12.
5. "New General Catalog Objects: NGC 3800 - 3849". cseligman.com. Retrieved 2018-07-09.
6. "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2018-07-12.
7. "NGC 3840". Retrieved 2018-07-12.
8. "Hierarchy catalogue". leda.univ-lyon1.fr. Retrieved 2018-07-12.
9. Scott, T. C.; Bravo-Alfaro, H.; Brinks, E.; Caretta, C. A.; Cortese, L.; Boselli, A.; Hardcastle, M. J.; Croston, J. H.; Plauchu, I. (2010-04-11). "Probing evolutionary mechanisms in galaxy clusters: neutral atomic hydrogen in Abell 1367". Monthly Notices of the Royal Astronomical Society. 403 (3): 1175–1192. arXiv:1001.3900. Bibcode:2010MNRAS.403.1175S. doi:10.1111/j.1365-2966.2009.16204.x. ISSN 0035-8711.
10. Sun, M.; Vikhlinin, A.; Forman, W.; Jones, C.; Murray, S. S. (2005). "The Survival and Destruction of X-Ray Coronae of Early-Type Galaxies in Rich Cluster Environments: A Case Study of A1367". The Astrophysical Journal. 619 (1): 169–177. arXiv:astro-ph/0408425. Bibcode:2005ApJ...619..169S. doi:10.1086/425298. ISSN 0004-637X.

External links

• Media related to NGC 3840 at Wikimedia Commons

• NGC 3840 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images