Astronomy:NGC 4457

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Short description: Galaxy in the constellation of Virgo
NGC 4457
NGC4457 - SDSS DR14.jpg
SDSS image of NGC 4457
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 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 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 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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NASA/IPAC Extragalactic Database". Results for NGC 4457. http://nedwww.ipac.caltech.edu/. 
  2. ↑ 2.0 2.1 "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4457&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES. 
  3. ↑ Rojas, Sebastián García. "Galaxy NGC 4457 - Galaxy in Virgo Constellation · Deep Sky Objects Browser" (in en). https://dso-browser.com/deep-sky/5503/ngc-4457/galaxy. 
  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. doi:10.1086/308690. Bibcode: 2000ApJ...533..729T. 
  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. doi:10.1051/0004-6361/201321163. Bibcode: 2013A&A...553A.116V. 
  6. ↑ "New General Catalog Objects: NGC 4450 - 4499" (in en-US). http://cseligman.com/text/atlas/ngc44a.htm#4457. 
  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" (in en). The Astronomical Journal 90: 1681. doi:10.1086/113874. ISSN 0004-6256. Bibcode: 1985AJ.....90.1681B. 
  8. ↑ 8.0 8.1 Tully, R. B. (June 1982). "The Local Supercluster" (in en). The Astrophysical Journal 257: 389–422. doi:10.1086/159999. ISSN 0004-637X. Bibcode: 1982ApJ...257..389T. 
  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" (in en). The Astrophysical Journal Supplement Series 135 (2): 125–154. doi:10.1086/323532. ISSN 0067-0049. Bibcode: 2001ApJS..135..125K. http://stacks.iop.org/0067-0049/135/i=2/a=125. 
  10. ↑ Binggeli, B.; Popescu, C. C; Tammann, G. A. (April 11, 1993). "The kinematics of the Virgo cluster revisited". Astronomy and Astrophysics Supplement Series 98: 275–296. Bibcode: 1993A&AS...98..275B. http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993A%26AS...98..275B&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf. 
  11. ↑ "The Virgo II Groups". http://www.atlasoftheuniverse.com/galgrps/virii.html. 
  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" (in en). Astronomy & Astrophysics 553: A116. doi:10.1051/0004-6361/201321163. ISSN 0004-6361. Bibcode: 2013A&A...553A.116V. 
  13. ↑ SN 2020nvb TNS
  14. ↑ 14.0 14.1 "NGC 4457 - (R)SAB(s)a". http://kudzu.astr.ua.edu/devatlas/NGC_4457______B___________.html. 
  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. doi:10.1088/0067-0049/216/1/9. Bibcode: 2015ApJS..216....9C. 
  16. ↑ "Robert A. Piontek -- Ram Pressure Stripping". http://www.aip.de/~rpiontek/ram.html. 

External links



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