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.
| NGC 2004 | |
|---|---|
 Hubble Space Telescope image of NGC 2004 | |
| Observation data (J2000 epoch) | |
| Right ascension | 05h 30m 41.340s[1] |
| Declination | −67° 17′ 21.83″[1] |
| Distance | 163.1 ± 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 age | 20 Ma[5] |
| Other designations | NGC 2004, ESO 86-SC4[3] |
| Associations | |
| Constellation | Dorado |
References
edit- ^ 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.
- ^ 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.
- ^ a b "NGC 2004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 May 2019.
- ^ 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.
- ^ 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.
- ^ Seligman, Courtney. "New General Catalog Objects: NGC 2000 - 2049". New General Catalog Objects: NGC 2000 - 2049. Retrieved 28 May 2019.
- ^ 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.
External links
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Media related to NGC 2004 at Wikimedia Commons
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