Astronomy:NGC 2004
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Short description: Open cluster in the constellation Dorado
| NGC 2004 | |
|---|---|
 Hubble Space Telescope image of NGC 2004 | |
| Observation data (J2000 epoch) | |
| Constellation | Dorado |
| 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] |
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
- ↑ 1.0 1.1 Werchan, Felicia; Zaritsky, Dennis (2011). "The Star Clusters of the Large Magellanic Cloud: Structural Parameters". The Astronomical Journal 142 (2): 48. doi:10.1088/0004-6256/142/2/48. Bibcode: 2011AJ....142...48W.
- ↑ 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. doi:10.1093/mnras/stz732. Bibcode: 2019MNRAS.486..266B.
- ↑ 3.0 3.1 "NGC 2004". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2004.
- ↑ 4.0 4.1 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. doi:10.1111/j.1365-2966.2008.13612.x. Bibcode: 2008MNRAS.389..678B.
- ↑ 5.0 5.1 5.2 Niederhofer, F. et al. (March 2015). "No evidence for significant age spreads in young massive LMC clusters". Astronomy & Astrophysics 575: 18. doi:10.1051/0004-6361/201424455. A62. Bibcode: 2015A&A...575A..62N.
- ↑ Seligman, Courtney. "New General Catalog Objects: NGC 2000 - 2049". https://cseligman.com/text/atlas/ngc20.htm.
- ↑ Nikolov, Grigor; Markov, Haralambi (February 2019). "Characterising LMC Star cluster NGC 2004". AIP Conference Proceedings 2075 (1): 090005. doi:10.1063/1.5091219. 090005. Bibcode: 2019AIPC.2075i0005N.
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