Westerlund 1-237
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Stern Westerlund 1-237 |
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| Image of the super star cluster Westerlund 1 . Wd 1-237 is the bright reddish star below the center of the picture | |||
| AladinLite | |||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | altar | ||
| Right ascension | 16 h 47 m 3.11 s | ||
| declination | -45 ° 52 ′ 19 ″ | ||
| Apparent brightness | 19.01 mag | ||
| Typing | |||
| Spectral class | M3Ia | ||
| Astrometry | |||
| Physical Properties | |||
| radius | 1245 R ☉ | ||
| Luminosity |
2.3 * 10 5 L ☉ |
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| Effective temperature | 3,600 K | ||
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Other names and catalog entries |
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Westerlund 1-237 or W237 is an extreme red supergiant belonging to the spectral class M3Ia. With an estimated diameter of 1245 solar radii, a luminosity of 234,000 L and an effective temperature of 3,600 K, it is one of the largest known stars . It is located in the star cluster Westerlund 1 in the constellation Altar , where it is one of a total of 4 known red giants ( Westerlund 1-26 , Westerlund 1-20, Westerlund 1-237, Westerlund 1-75). Westerlund 1-237 is surrounded by an elliptical radio nebula, which is similar in mass to that of W20 and W26, and is comparable to that of VY Canis Majoris.
Individual evidence
- ^ Cl * Westerlund 1 W 237. In: Simbad. Retrieved June 28, 2020 (English).
- ↑ Thomas KT Fok, Jun-ichi Nakashima, Bosco HK Yung, Chih-Hao Hsia, Shuji Deguchi: Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters . In: ApJ . tape 760 , no. 1 , November 2012, ISSN 0004-637X , p. 65 , doi : 10.1088 / 0004-637X / 760/1/65 ( harvard.edu [accessed June 28, 2020]).
- ↑ APOD: 2017 June 20 - The Massive Stars in Westerlund 1. Retrieved June 28, 2020 .
- ↑ SM Dougherty, JS Clark, I. Negueruela, T. Johnson, JM Chapman: Radio emission from the massive stars in the Galactic Super Star Cluster Westerlund 1 . In: Astronomy and Astrophysics . tape 511 , February 2010, ISSN 0004-6361 , p. A58 , doi : 10.1051 / 0004-6361 / 200913505 , arxiv : 0912.4165 .