How Can We Help?
You are here:
< Back
Galaxy in the constellation of Virgo
NGC 4491 is a dwarf barred spiral galaxy[2] located about 55 million light-years away[3] in the constellation Virgo.[4] NGC 4491 was discovered by astronomer William Herschel on March 15, 1784.[5] NGC 4491 is located in a subgroup of the Virgo Cluster centered on Messier 87 known as the Virgo A subgroup.[2]
Tidal interactions
NGC 4491 is a strongly barred galaxy. The bar may have grown from the tidal influence of other galaxies in the Virgo Cluster.[2]
Possible Seyfert activity
The infrared-radio properties of NGC 4491 possibly suggest the presence of an AGN in the galaxy. However, spectral analysis of the galaxy does not support this view since emission lines are absent or very weak and narrow.[2]
See also
References
- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4491. Retrieved 2017-10-21.
- ^ a b c d e Roussel, H.; Helou, G.; Beck, R.; Condon, J. J.; Bosma, A.; Matthews, K.; Jarrett, T. H. (2 May 2003). "Nascent Starbursts in Synchrotron‐deficient Galaxies with Hot Dust". The Astrophysical Journal. 593 (2): 733–759. arXiv:astro-ph/0305046. Bibcode:2003ApJ...593..733R. doi:10.1086/376691. S2CID 122402426.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-22.
- ^ Rojas, Sebastián García. "Galaxy NGC 4491 - Barred Spiral Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-10-22.
- ^ "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-10-08.
External links
- NGC 4491 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Categories
-
Annuals36
-
Bulbs, Corms & Tubers41
-
Ferns27
-
Fruits3
-
Garden Plants23
-
Grasses26
-
Herb17
-
Insects1
-
Mammals1
-
Midwest Native Plants0
-
Northeast Native Plants112
-
Perennials123
-
Rose1
-
Shrubs47
-
Trees112
-
Tropical Plants53
-
Upland Birds5
-
Vines18
-
Viola Tricolor1
-
Water Gardening & Plants9
-
Waterfowl0
-
Wetland Birds0
-
Wetland Plants4
-
Wildbirds172
-
Wildflowers1
-
Woodland Plants29
Table of Contents
Recent Comments