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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]

NGC 4666
The superwind galaxy NGC 4666
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 45m 08.676s[1]
Declination−00° 27′ 42.88″[1]
Helio radial velocity1,517 km/s[2]
Distance54.89 ± 0.65 Mly (16.83 ± 0.20 Mpc)[3]
Apparent magnitude (V)10.8[4]
Characteristics
TypeSABc[2]
Apparent size (V)4′.6 × 1'.3[2]
Notable featuresStarburst
Other designations
NGC 4666, IRAS F12425-0011, MCG+00-33-008, MRC 1242-001, PMN J1245-0027, UGC 7926, UZC J124508.0-002744, PGC 42975[5]

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 8.9×10−3 M☉ yr−1 kpc−2. Unlike in many other starburst galaxies, the star formation is spread across the disk rather than being more concentrated.[2]

A type Ia supernova was detected in NGC 4666 on 9 December 2014;[11][12] ASASSN-14lp is located 12″ from the center of NGC 4666. A type Ib supernova, SN 2019yvr, was detected on 27 December 2019.[13] It has a 0.005 redshift. Images of the location of the supernova before the explosion showed the progenitor star was ~19M☉.[14]


Enlarged view of the center of NGC 4666 by the Hubble Space Telescope
Enlarged view of the center of NGC 4666 by the Hubble Space Telescope




References


  1. Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131: 1163–1183. doi:10.1086/498708. ISSN 0004-6256.
  2. Stein, Y.; et al. (March 2019). "CHANG-ES. XIII. Transport processes and the magnetic fields of NGC 4666: indication of a reversing disk magnetic field". Astronomy & Astrophysics. 623: 21. arXiv:1901.08090. Bibcode:2019A&A...623A..33S. doi:10.1051/0004-6361/201834515. A33.
  3. Tully, R. Brent; et al. (October 2013), "Cosmicflows-2: The Data", The Astronomical Journal, 146 (4): 25, arXiv:1307.7213, Bibcode:2013AJ....146...86T, doi:10.1088/0004-6256/146/4/86, 86
  4. "The Interactive NGC Catalog Online". Results for NGC 4666. Retrieved 2010-09-21.
  5. "NGC 4666". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-09-22.
  6. "The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.
  7. Seligman, Courtney. "New General Catalogue objects: NGC 4650 - 4699". cseligman.com. Retrieved 2020-09-20.
  8. Walter, Fabian; et al. (May 2004). "The Superwind Galaxy NGC 4666: Gravitational Interactions and the Influence of the Resulting Starburst on the Interstellar Medium". The Astrophysical Journal. 606 (1): 258–270. Bibcode:2004ApJ...606..258W. doi:10.1086/382774.
  9. "The Superwind Galaxy". ESO. 1 September 2010.
  10. "Extra-planar Hot Gas and Magnetic Fields in the Superwind Galaxy NGC 4666". ESA. 24 February 2011.
  11. "ASAS-SN Discovery of A Bright Probable Supernova in NGC 4666". Astronomer's Telegram.
  12. "Supernovae ASASSN-14lp in NGC 4666". Rochester Astronomy.
  13. "SN 2019xvr". Transient Name Server.
  14. Kilpatrick, Charles; et al. (2021-03-30). "A Cool and Inflated Progenitor Candidate for the Type Ib Supernova 2019yvr at 2.6 Years Before Explosion". Monthly Notices of the Royal Astronomical Society. arXiv:2101.03206. doi:10.1093/mnras/stab838.


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На других языках

[de] NGC 4666

NGC 4666 ist eine Balken-Spiralgalaxie mit aktivem Galaxienkern vom Hubble-Typ SBc im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 65 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 90.000 Lj.
- [en] NGC 4666

[es] NGC 4666

NGC 4666 es una galaxia espiral intermedia situada en la constelación de Virgo cerca de la estrella doble Gamma Virginis y que puede apreciarse con telescopios de aficionado. Se halla en las regiones exteriores del Cúmulo de Virgo, a 80 millones de años luz de la Vía Láctea, y es la galaxia más brillante de un grupo de galaxias pequeño que incluye entre otras a las galaxias NGC 4632 y NGC 4668.

[ru] NGC 4666

NGC 4666 (другие обозначения — UGC 7926, MCG 0-33-8, ZWG 15.15, PGC 42975) — спиральная галактика с перемычкой (SBc) в созвездии Дева.


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