NGC 4457

Source: Wikipedia, the free encyclopedia.
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

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

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

ram-pressure stripping.[16]

See also

References

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4457. Retrieved 2017-08-18.
  2. ^ a b "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. S2CID 14130773
    .
  5. S2CID 119190841
    .
  6. ^ "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-08-18.
  7. ISSN 0004-6256
    .
  8. ^
    ISSN 0004-637X
    .
  9. S2CID 14603109
    .
  10. Bibcode:1993A&AS...98..275B
    .
  11. ^ "The Virgo II Groups". www.atlasoftheuniverse.com. Retrieved 2018-04-25.
  12. S2CID 119190841
    .
  13. ^ SN 2020nvb TNS
  14. ^ a b "NGC 4457 - (R)SAB(s)a". The de Vaucouleurs Atlas of Galaxies. Retrieved 2017-08-19.
  15. S2CID 53658261
    .
  16. ^ "Robert A. Piontek -- Ram Pressure Stripping". www.aip.de. Archived from the original on 2016-10-16. Retrieved 2017-08-19.

External links

Wikimedia Commons has media related to NGC 4457.
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