Langbahn Team – Weltmeisterschaft

NGC 2004

NGC 2004
Hubble Space Telescope image of NGC 2004
Observation data (J2000 epoch)
Right ascension05h 30m 41.340s[1]
Declination−67° 17′ 21.83″[1]
Distance163.1 ± 0.3 ly (50 ± 0.1 pc)[2]
Apparent magnitude (V)9.6[3]
Apparent dimensions (V)3.0' × 2.8'[4]
Physical characteristics
Mass~2.3×104[5] M☉
Estimated age20 Ma[5]
Other designationsNGC 2004, ESO 86-SC4[3]
Associations
ConstellationDorado
See also: Open cluster, List of open clusters

NGC 2004 (also known as ESO 86-SC4) is an open cluster of stars in the southern constellation of Dorado. It was discovered by Scottish astronomer James Dunlop on September 24, 1826.[6] This is a young, massive cluster with an age of about 20 million years and 23,000 times the mass of the Sun.[5] It has a core radius of 2.85 ± 0.46 pc (9.3 ± 1.5 ly).[7] NGC 2004 is a member of the Large Magellanic Cloud,[4] which is a satellite galaxy of the Milky Way.

References

  1. ^ a b Werchan, Felicia; Zaritsky, Dennis (2011). "The Star Clusters of the Large Magellanic Cloud: Structural Parameters". The Astronomical Journal. 142 (2): 48. arXiv:1105.1769. Bibcode:2011AJ....142...48W. doi:10.1088/0004-6256/142/2/48. S2CID 118331608.
  2. ^ Beasor, Emma R.; et al. (June 2019). "Discrepancies in the ages of young star clusters; evidence for mergers?". Monthly Notices of the Royal Astronomical Society. 486 (1): 266–273. arXiv:1903.05106. Bibcode:2019MNRAS.486..266B. doi:10.1093/mnras/stz732.
  3. ^ a b "NGC 2004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 May 2019.
  4. ^ a b Bica, E.; et al. (September 2008). "A general catalogue of extended objects in the Magellanic System". Monthly Notices of the Royal Astronomical Society. 389 (2): 678–690. arXiv:0806.3049. Bibcode:2008MNRAS.389..678B. doi:10.1111/j.1365-2966.2008.13612.x. S2CID 1867090.
  5. ^ a b c Niederhofer, F.; et al. (March 2015). "No evidence for significant age spreads in young massive LMC clusters". Astronomy & Astrophysics. 575: 18. arXiv:1501.02275. Bibcode:2015A&A...575A..62N. doi:10.1051/0004-6361/201424455. S2CID 54754949. A62.
  6. ^ Seligman, Courtney. "New General Catalog Objects: NGC 2000 - 2049". New General Catalog Objects: NGC 2000 - 2049. Retrieved 28 May 2019.
  7. ^ Nikolov, Grigor; Markov, Haralambi (February 2019). "Characterising LMC Star cluster NGC 2004". AIP Conference Proceedings. 2075 (1): 090005. Bibcode:2019AIPC.2075i0005N. doi:10.1063/1.5091219. S2CID 126858905. 090005.
  • Media related to NGC 2004 at Wikimedia Commons


Quelle: https://en.wikipedia.org/wiki/NGC_2004