NGC 4666, IRAS F12425-0011, MCG+00-33-008, MRC 1242-001, PMN J1245-0027, UGC 7926, UZC J124508.0-002744, PGC 42975[5]
NGC 4666 is a spiral galaxy in the equatorial constellation of Virgo, located at a distance of approximately 55 megalight-years from the Milky Way.[3] It was discovered by the German-born astronomer William Herschel on February 22, 1784. It is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster.[6] John L. E. Dreyer described it as "bright, very large, much extended 45°±, pretty suddenly brighter middle".[7] It is a member of an interacting system with NGC 4668 and a dwarf galaxy,[8] and belongs to a small group that also includes NGC 4632.[2]
The morphological classification of this galaxy is SABc, which indicates a weak bar around the nucleus with moderately wound spiral arms. Viewed nearly edge-on, its galactic plane is inclined at an angle of 85°±2° to the line of sight from the Earth, with the major axis aligned along a position angle of 40°. There is an active galactic nucleus that shows a modest level of activity and is most likely heavily obscured by gas and dust. The central point source has been detected in the radio and X-ray bands.[2]
This is a starburst galaxy that is noteworthy for its vigorous star formation, which creates an unusual superwind[9] of out-flowing gas. This wind is not visible at optical wavelengths, but is prominent in X-rays, and has been observed by the ESA XMM-Newton space telescope.[10] The estimated star formation rate is 7.3 M☉ yr–1, with a density of 8.9×10−3M☉ yr−1 kpc−2. Unlike in many other starburst galaxies, the star formation is spread across the disk rather than being more concentrated.[2]
Three supernovae have been observed in NGC 4666. On 23 May 1965, Enrique Chavira discovered SN 1965H (type IIP, mag. 14).[11] A type Ia supernova was detected in NGC 4666 on 9 December 2014;[12][13] ASASSN-14lp is located 12″ from the center of NGC 4666. A type Ib supernova, SN 2019yvr, was detected on 27 December 2019.[14] It has a 0.005 redshift. Images of the location of the supernova before the explosion showed the progenitor star was ~19M☉.[15]
Enlarged view of the center of NGC 4666 by the Hubble Space Telescope
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^"The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.
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^Transient Name Server entry for SN 1965H. Retrieved 23 March 2023.
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NGC4666 is a spiral galaxy in the equatorial constellation of Virgo, located at a distance of approximately 55 megalight-years from the Milky Way. It...
MCG-3-33-30 NGC 4457 NGC 4487 NGC 4504 NGC 4517 NGC 4546 NGC 4586 NGC 4592 NGC 4597 NGC 4665 NGC4666NGC 4684 NGC 4701 NGC 5054 NGC 5170 NGC 5247 M96 Group...
in nearby galaxy centers. The star-burst galaxies NGC 278, NGC 660, NGC 3628 NGC 4631, and NGC4666". Astronomy and Astrophysics. 506 (2): 689–702. arXiv:0908...
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