R136
| R136 | |
|---|---|
.jpg) The massive, young stellar grouping, called R136, is only a few million years old and resides in the 30 Doradus Nebula, a turbulent star-birth region in the Large Magellanic Cloud (LMC), a satellite galaxy of our Milky Way. There is no known star-forming region in our galaxy as large or as prolific as 30 Doradus. The image, taken in ultraviolet, visible, and red light by Hubble's Wide Field Camera 3, spans about 100 light-years. Credit: Hubble Space Telescope | |
| Observation data (J2000.0 epoch) | |
| Right ascension | 05h 38m 42.396s |
| Declination | −69° 06′ 03.36″ |
| Distance | 157 kly (48.5 kpc) |
| Apparent magnitude (V) | 9.50 |
| Physical characteristics | |
| Other designations | [1] UCAC2 1803442, SAO 249329, HD 38268, TYC 9163-1014-1, CD-69 324, GC 7114 |
| Associations | |
| Constellation | Dorado |
R136, also RMC 136, is a super star cluster [2] near the center of the 30 Doradus complex (also known as the Tarantula Nebula), in the Large Magellanic Cloud. It is a young star cluster, age 1-2 million years,[2] of giant and supergiant stars. The majority of its stars are of spectral type O3,[2] with 39 confirmed O3-type stars [2][3]. Additionally, there are several confirmed Wolf-Rayet stars [3][4].
The cluster R136 contains several components.[1] The nature of the central component, R136a, was initially unclear until it was resolved by holographic speckle interferometry and found to be a dense star cluster[5] containing, among other things, twelve very massive and luminous stars in its core.[6] These stars had initial masses calculated to be in the range of 37 to 76 solar masses.[6] R136 produces most of the energy that makes the Tarantula Nebula visible. The estimated mass of the cluster is 450,000 solar masses, suggesting it will likely become a globular cluster in the future.[7]
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| R136 Ab (SNR B0538-69.2) | 05h 37m 51.6s | -69° 10' 23 | 9.59 | SNR | Simbad |
| R136 Ac (PSR J0537-6910) | 05h 37m 47.6s | -69° 10' 20 | Pulsar | Simbad | |
| R136b (BAT99 111) | 05h 38m 42.78s | -69° 06' 03.1 | 13.66 | O4 | Simbad |
 |
See also
References
- ^ a b Simbad data for RMC 136
- ^ a b c d Massey, P ; Hunter, D. (January 1998), "Star Formation in R136: A Cluster of O3 Stars Revealed by Hubble Space Telescope Spectroscopy", The Astrophysical Journal, 493 (1): 180, doi:10.1086/306503
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ a b Lebouteiller, V.; Bernard-Salas, J.; Brandl, B.; Whelan, D. G.; Wu, Yanling; Charmandaris, V.; Devost, D.; Houck, J. R. (June 2008), "Chemical Composition and Mixing in Giant H II Regions: NGC 3603, 30 Doradus, and N66", The Astrophysical Journal, 680 (1): 398–419, doi:10.1086/587503
{{citation}}: CS1 maint: multiple names: authors list (link) - ^ Melnick, J. (December 1985,). "The 30 Doradus nebula. I - Spectral classification of 69 stars in the central cluster". Astronomy and Astrophysics. 153 (1): 235–244.
{{cite journal}}: Check date values in:|date=(help)CS1 maint: extra punctuation (link) - ^ Weigelt, G.; Baier, G. (September 1985). "R136a in the 30 Doradus nebula resolved by holographic speckle interferometry". Astronomy and Astrophysics. 150: L18–L20.
{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: year (link) - ^ a b Koter, Heap, and Hubeny (1998). "An Empirical Isochrone of Very Massive Stars in R136A". The Astrophysical Journal. 509: 879–896. doi:10.1086/306503.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Bosch, Guillermo (2009). "Gemini/GMOS Search for Massive Binaries in the Ionizing Cluster of 30 Dor". Astronomical Journal. 137 (2): 3437–3441. doi:10.1088/0004-6256/137/2/3437.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help)
Further reading
- http://www.spacetelescope.org/news/html/heic0416.html
- Crowther, P.A. (1997). "Fundamental parameters of Wolf-Rayet stars / VI. Large Magellanic Cloud WNL stars". Astronomy and Astrophysics. 320. Gower Street, London, WC1E 6BT, UK: Department of Physics and Astronomy, University College London: 500–524.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help)CS1 maint: location (link) - R 136 in the Aladin previewer
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