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NGC 4457 is an intermediate spiral galaxy located about 55 million light-years away[2] in the constellation of Virgo.[3] It is also classified as a LINER galaxy, a class of active galaxy defined by their spectral line emissions.[4][2] NGC 4457 Is inclined by about 33°.[5] It was discovered by astronomer William Herschel on February 23, 1784.[6] Despite being listed in the Virgo Cluster Catalog as VCC 1145,[7] NGC 4457 is a member of the Virgo II Groups[8][9][10] which form an extension of the Virgo cluster.[8][11]

NGC 4457
SDSS image of NGC 4457
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 28m 59.0s[1]
Declination03° 34′ 14″[1]
Redshift0.002942[1]
Helio radial velocity882 km/s[1]
Distance54,801,600 ly
Group or clusterVirgo II Groups
Apparent magnitude (V)11.76[1]
Characteristics
Type(R)SAB(s)0/a, LINER[1]
Size~ 38,687.32 ly
Apparent size (V)2.7 × 2.3[1]
Other designations
CGCG 42-124, IRAS 12264+0350, MCG 1-32-75, PGC 41101, UGC 7609, VCC 1145 [1]

NGC 4457 may have had a recent minor merger with another galaxy.[12]

On July 1 2020, an astronomical transient was discovered in NGC 4457 by astronomer Kiochi Itagaki and confirmed by ASAS-SN. Spectroscopic classification determined the object to be a Type Ia Supernova, SN 2020nvb.[13]


Physical characteristics


NGC 4457 has a broad oval zone containing an inner spiral which is defined mainly by two fairly open arms. There is a well-defined outer ring that is completely detached from the inner regions of the galaxy.[14]


Truncated disk


NGC 4457 has a severely reduced amount of star-formation in its disk while its inner regions have a normalized rate of massive star formation.[14] This may have been caused by a recent interaction of the gas in the galaxy with the gas in the surrounding Virgo Cluster,[15] causing the gas to be stripped away in an effect known as ram-pressure stripping.[16]


See also



References


  1. "NASA/IPAC Extragalactic Database". Results for NGC 4457. Retrieved 2017-08-18.
  2. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-08-19.
  3. Rojas, Sebastián García. "Galaxy NGC 4457 - Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-08-19.
  4. TERASHIMA, YUICHI; HO, LUIS C.; PTAK, ANDREW F.; MUSHOTZKY, RICHARD F.; SERLEMITSOS, PETER J.; YAQOOB, TAHIR; KUNIEDA, HIDEYO (20 April 2000). "ASCA Observations of "Type 2" LINERs: Evidence for a Stellar Source of Ionization". The Astrophysical Journal. 533 (2): 729–743. arXiv:astro-ph/9911340. Bibcode:2000ApJ...533..729T. doi:10.1086/308690. S2CID 14130773.
  5. Vollmer, B.; Soida, M.; Beck, R.; Chung, A.; Urbanik, M.; Chyzy, K.T.; Otmianowska-Mazur, K.; Kenney, J.D.P. (4 April 2013). "Large-scale radio continuum properties of 19 Virgo cluster galaxies⋆ The influence of tidal interactions, ram pressure stripping, and accreting gas envelopes". Astronomy & Astrophysics. 553: 38. arXiv:1304.1279. Bibcode:2013A&A...553A.116V. doi:10.1051/0004-6361/201321163. S2CID 119190841.
  6. "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-08-18.
  7. Binggeli, B.; Sandage, A.; Tammann, G. A. (September 1985). "Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area. V - Luminosity functions of Virgo Cluster galaxies". The Astronomical Journal. 90: 1681. Bibcode:1985AJ.....90.1681B. doi:10.1086/113874. ISSN 0004-6256.
  8. Tully, R. B. (June 1982). "The Local Supercluster". The Astrophysical Journal. 257: 389–422. Bibcode:1982ApJ...257..389T. doi:10.1086/159999. ISSN 0004-637X.
  9. Koopmann, Rebecca A.; Kenney, Jeffrey D. P.; Young, Judith (2001). "An Atlas of Hα and R Images and Radial Profiles of 63 Bright Virgo Cluster Spiral Galaxies". The Astrophysical Journal Supplement Series. 135 (2): 125–154. arXiv:astro-ph/0106335. Bibcode:2001ApJS..135..125K. doi:10.1086/323532. ISSN 0067-0049. S2CID 14603109.
  10. Binggeli, B.; Popescu, C. C; Tammann, G. A. (April 11, 1993). "The kinematics of the Virgo cluster revisited" (PDF). Astronomy and Astrophysics Supplement Series. 98: 275–296. Bibcode:1993A&AS...98..275B.
  11. "The Virgo II Groups". www.atlasoftheuniverse.com. Retrieved 2018-04-25.
  12. Vollmer, B.; Soida, M.; Beck, R.; Chung, A.; Urbanik, M.; Chyży, K. T.; Otmianowska-Mazur, K.; Kenney, J. D. P. (May 2013). "Large-scale radio continuum properties of 19 Virgo cluster galaxies". Astronomy & Astrophysics. 553: A116. arXiv:1304.1279. Bibcode:2013A&A...553A.116V. doi:10.1051/0004-6361/201321163. ISSN 0004-6361. S2CID 119190841.
  13. SN 2020nvb TNS
  14. "NGC 4457 - (R)SAB(s)a". The de Vaucouleurs Atlas of Galaxies. Retrieved 2017-08-19.
  15. Cortes, Juan R.; Kenney, Jeffrey D. P.; Hardy, Eduardo (24 December 2014). "Integral-Field Stellar and Ionized Gas Kinematics of Peculiar Virgo Cluster Spiral Galaxies". The Astrophysical Journal Supplement Series. 216 (1): 9. arXiv:1411.3387. Bibcode:2015ApJS..216....9C. doi:10.1088/0067-0049/216/1/9. S2CID 53658261.
  16. "Robert A. Piontek -- Ram Pressure Stripping". www.aip.de. Archived from the original on 2016-10-16. Retrieved 2017-08-19.


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На других языках

[de] NGC 4457

NGC 4457 ist eine Linsenförmige Galaxie mit aktivem Galaxienkern vom Hubble-Typ SB0/a im Sternbild Jungfrau an der Ekliptik. Sie ist schätzungsweise 36 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 30.000 Lj. Unter der Katalognummer VCC 1145 ist sie als Mitglied des Virgo-Galaxienhaufens aufgeführt.
- [en] NGC 4457

[ru] NGC 4457

NGC 4457 (другие обозначения — UGC 7609, MCG 1-32-75, ZWG 42.124, VCC 1145, IRAS12264+0350, PGC 41101) — галактика в созвездии Дева.


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