CGCG 97-91, IRAS 11413+2021, MCG 3-30-70, PGC 36477, UGC 6702[1]
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 is likely to be a low-luminosity AGN (LLAGN).[10]
^ abcdefghij"NASA/IPAC Extragalactic Database". Results for NGC 3840. Retrieved 2018-07-12.
^"Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-07-12.
^"NED Query Results for NGC 3840". ned.ipac.caltech.edu. Retrieved 2018-07-12.
^"Revised NGC Data for NGC 3840". spider.seds.org. Retrieved 2018-07-12.
^"New General Catalog Objects: NGC 3800 - 3849". cseligman.com. Retrieved 2018-07-09.
^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. S2CID 17147621.
^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. S2CID 16811452.
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