NGC 3893 explained

NGC 3893
Credit:NASA/JPL-Caltech
Epoch:J2000
Type:SAB(rs)c [1]
Dist Ly:51.4 ± 10.4 Mly (15.8 ± 3.2 Mpc)
Z:0.003226 ± 0.000003
H Radial V:967 ± 1 km/s
Appmag V:10.2
Size V:4.5 × 2.8
Constellation Name:Ursa Major
Names:UGC 6778, MCG +08-22-007, PGC 36875

NGC 3893 is a spiral galaxy located in the constellation Ursa Major. It is located at a distance of circa 50 million light years from Earth, which, given its apparent dimensions, means that NGC 3893 is about 70,000 light years across. It was discovered by William Herschel on February 9, 1788.[2] NGC 3893 interacts with its satellite, NGC 3896.

Characteristics

NGC 3893 is a grand design spiral galaxy. It has two main arms, with high surface brightness and numerous HII regions.[3] A faint spiral arm extends from the south to the north side making an arc on the east side of NGC 3893.[4] The galaxy is categorised as SAB in NED, but Hernández-Toledo and Puerari did not detect a bar in their observations.[5] The stellar disk of NGC 3893 is estimated to have a mass of 2.3x1010 and dominates gas dynamics in the optical radius.[6] The star formation rate in NGC 3893 is about 5.62 /year.[7]

Although no supernovae have been observed in NGC 3893 yet, Kōichi Itagaki discovered a luminous red nova, designated AT 2023uhx, on 7 October 2023 (type LRN, mag. 17.2).[8]

Nearby galaxies

NGC 3893 interacts with NGC 3896, a smaller galaxy lying at an angular distance of 3.9 arcminutes, and this results in a number of tidal features, like warps and bridges. A bridge of material is observed in HI imaging connecting the two galaxies.[9] A stellar debris bridge is observed at the south side, better seen in B-band images, suggesting it is composed of young stars.[4] The mass ratio between the two galaxies is about 0.025 - 0.031.[10]

NGC 3893 and its smaller companion NGC 3896 are members of the NGC 3877 group,[11] which belongs to the south Ursa Major groups, part of the Virgo Supercluster.[12] NGC 3906 lies 20 arcminutes to the southeast of NGC 3893.[4] Other galaxies in the same group are NGC 3726, NGC 3928, NGC 3949, NGC 3985, and NGC 4010.[11]

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 3893 . 2016-01-18 .
  2. Web site: Seligman . Courtney . NGC 3893 . Celestial Atlas . 19 November 2018.
  3. Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  4. Gabbasov . R. F. . Rosado . M.. Margarita Rosado . Klapp . J. . An interaction scenario of the galaxy pair NGC 3893/96 (KPG 302). A single passage? . The Astrophysical Journal . 2 May 2014 . 787 . 1 . 39 . 10.1088/0004-637X/787/1/39. 2014ApJ...787...39G . 1405.1446 . 118992651 .
  5. Hernández-Toledo . H. M. . Puerari . I. . BVRI surface photometry of (S+S) binary galaxies . Astronomy & Astrophysics . November 2001 . 379 . 1 . 54–71 . 10.1051/0004-6361:20011275 . en . 0004-6361. astro-ph/0010531 . 118914650 .
  6. Kranz . Thilo . Slyz . Adrianne . Rix . Hans-Walter . Dark Matter within High Surface Brightness Spiral Galaxies . The Astrophysical Journal . 20 March 2003 . 586 . 1 . 143–151 . 10.1086/367551. 2003ApJ...586..143K . astro-ph/0212290 . 5228135 .
  7. James . P. A. . Shane . N. S. . Beckman . J. E. . Cardwell . A. . Collins . C. A. . Etherton . J. . de Jong . R. S. . Fathi . K. . Knapen . J. H. . Peletier . R. F. . Percival . S. M. . Pollacco . D. L. . Seigar . M. S. . Stedman . S. . Steele . I. A. . The Hα galaxy survey . Astronomy & Astrophysics . 12 January 2004 . 414 . 1 . 23–43 . 10.1051/0004-6361:20031568 . astro-ph/0311030 . free .
  8. https://www.wis-tns.org/object/2023uhx Transient Name Server entry for AT 2023uhx.
  9. Verheijen . M. A. W. . Sancisi . R. . The Ursa Major cluster of galaxies . Astronomy & Astrophysics . 15 May 2001 . 370 . 3 . 765–867 . 10.1051/0004-6361:20010090. astro-ph/0101404. free .
  10. Fuentes-Carrera . I. . Rosado . M.. Margarita Rosado . Amram . P. . Salo . H. . Laurikainen . E. . Kinematics and dynamics of the M 51-type galaxy pair NGC 3893/96 (KPG 302) . Astronomy & Astrophysics . 24 April 2007 . 466 . 3 . 847–854 . 10.1051/0004-6361:20077071. 2007A&A...466..847F . astro-ph/0701878 . 15806337 .
  11. Makarov. Dmitry. Karachentsev. Igor. Galaxy groups and clouds in the local (z~ 0.01) Universe. Monthly Notices of the Royal Astronomical Society. 21 April 2011. 412. 4. 2498–2520. 10.1111/j.1365-2966.2010.18071.x. 2011MNRAS.412.2498M. 1011.6277. 119194025. 25 November 2018. 31 January 2016. https://web.archive.org/web/20160131020344/http://www.sao.ru/hq/dim/groups/galaxies.dat. dead.
  12. Web site: The Ursa Major Groups. www.atlasoftheuniverse.com.

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