NGC 2683 explained

NGC 2683
Epoch:J2000
Type:SA(rs)b[1]
Z:411 ± 1 km/s
Appmag V:10.6
Size V:9.3 × 2.2
Constellation Name:Lynx
Names:UGC 4641, PGC 24930

NGC 2683 is a field spiral galaxy in the northern constellation of Lynx. It was nicknamed the "UFO Galaxy" by the Astronaut Memorial Planetarium and Observatory.[2] [3] It was discovered by the astronomer William Herschel on February 5, 1788.[4]

It is viewed nearly edge-on from Earth's location in space and is located about 30 million light-years away, although previous estimates also give distances between 16 and 25 million light-years.[5]

NGC 2683 is receding from Earth at 410km/s, and from the Galactic Center at 375km/s.[2]

Visibility

The reddened light from the center of the galaxy appears yellowish due to the intervening gas and dust located within the outer arms of NGC 2683.[6] Its apparent magnitude is 10.6 making it not visible to the human eye without the aid of a small telescope.

Characteristics

While usually considered an unbarred spiral galaxy, recent research suggests it may in fact be a barred spiral galaxy; its bar is hard to see due to its high inclination.[7] Further support for the presence of a bar stems from the X-shaped structure seen near its centre, which is thought to be associated with a buckling instability of a stellar bar.[8]

It is also both smaller and less luminous than the Milky Way with very little neutral hydrogen[9] [10] or molecular hydrogen[10] and a low luminosity in the infrared, which suggests a currently low rate of star formation.[11]

NGC 2683 is rich in globular clusters, hosting about 300 of them, twice the number found in the Milky Way.[12] Due to its vast distance and complexity (due to the association of globular clusters bound to it), NGC 2638's mass has not been calculated as accurately as it could be. Otherwise its volume and vector motions are reasonably well known and characterized.

Several satellite galaxies are known in the vicinity of NGC 2683. The largest is KK 69, with a Holmberg diameter of 12,000 light-years (3.7 kiloparsecs). It is a dwarf transitional galaxy, with properties intermediate between those of dwarf irregular galaxies and dwarf spheroidal galaxies. Another is KK 70, which is about half the diameter of KK 69. Two additional dwarf galaxies are assumed to be satellites: they are N2683dw1 and N2683dw2, which are dwarf irregular and dwarf spheroidal galaxies, respectively.[13]

External links

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 2683 . 25 November 2006.
  2. Web site: NGC 2683 . SEDS . NGC Online . 4 February 2014.
  3. The structure of nearby groups of galaxies - Quantitative membership probabilities . Materne, J. . April 1979 . Astronomy and Astrophysics . 74 . 2 . 235–243 . 1979A&A....74..235M .
  4. Web site: New General Catalogue objects: NGC 2650 - 2699. Seligman, Courtney. cseligman.com. 2021-04-28.
  5. J. L. Tonry . 4 . A. Dressler . J. P. Blakeslee . E. A. Ajhar . A. B. Fletcher . G. A. Luppino . M. R. Metzger . C. B. Moore . The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances . Astrophysical Journal . 2001 . 546 . 2 . 681–693 . 2001ApJ...546..681T . 10.1086/318301 . astro-ph/0011223 . 17628238 .
  6. Web site: Best of AOP: NGC 2683. 15 November 2004. 12 October 2010. Doug. Matthews. Adam. Block. 8 October 2014. https://web.archive.org/web/20141008224130/http://www.noao.edu/outreach/aop/observers/n2683.html. dead.
  7. Kuzio de Naray, Rachel . Zagursky, Matthew J. . McGaugh, Stacy S. . Kinematic and Photometric Evidence for a Bar in NGC 2683 . The Astronomical Journal . 2009 . 138 . 4 . 1082–1089 . 2009AJ....138.1082K . 10.1088/0004-6256/138/4/1082 . 0908.0741 . 18950365 .
  8. Bogdan C. Ciambur; Alister W. Graham (2016), Quantifying the (X/peanut)-shaped structure in edge-on disc galaxies: length, strength, and nested peanuts
  9. Karachentsev, Igor D. . Karachentseva, Valentina E. . Huchtmeier, Walter K. . Makarov, Dmitry I. . A Catalog of Neighboring Galaxies . The Astronomical Journal . 2003 . 127 . 4 . 2031–2068 . 2004AJ....127.2031K . 10.1086/382905. free .
  10. A new catalogue of ISM content in normal galaxies. . Astronomy and Astrophysics . 405 . 5–14 . 2012-12-25 . 2003A&A...405....5B . Bettoni . D. . Galletta . G. . García-Burillo . S. . 2003 . astro-ph/0304054 . 10.1051/0004-6361:20030557 . 8935199 . 2016-03-03 . https://web.archive.org/web/20160303230034/http://www.astro.unipd.it/galletta/ismcat/ . dead .
  11. Pompei, E. . Terndrup, D. M. . The Stellar and Gaseous Kinematics of NGC 2683 . Galaxy Dynamics, Proceedings of a Conference Held at Rutgers University, 8-12 Aug 1998. ASP Conference Series (San Francisco: ASP) . David R. Merritt . Monica Valluri . J. A. Sellwood . 1998 . 182 . 221 . 1999ASPC..182..221P.
  12. Web site: Globular Cluster Systems in Galaxies Beyond the Local Grup. . NASA-IPAC Extragalactic Database (NED) . 2012-07-21.
  13. 10.1007/s10509-020-03825-2. 2006.12243. 2020Ap&SS.365..111S. New HI observations of KK 69. Is KK 69 a dwarf galaxy in transition?. 2020. Saponara. J.. Koribalski. B. S.. Patra. N. N.. Benaglia. P.. Astrophysics and Space Science. 365. 7. 111. 219966672.

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