WR 101-2
 | This article relies on a single source. (January 2023) |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Sagittarius[2] |
| Right ascension | 17h 45m 16.1s[3] |
| Declination | −28° 49′ 09″[3] |
| Characteristics | |
| Evolutionary stage | Wolf-Rayet |
| Spectral type | Ofpe/WN9[3] |
| Astrometry | |
| Distance | 8,000[3] pc |
| Details | |
| Radius | 79[3] R☉ |
| Luminosity | 2,399,000[3] L☉ |
| Temperature | 20,000[3] K |
| Other designations | |
| WR 101-2, CXOGC J174516.1-284909[4] | |
| Database references | |
| SIMBAD | data |
WR 101-2, also known as CXOGC J174516.1-284909, is a Wolf-Rayet star located in the Galactic Center, about 8,000 pc away from Earth. Its size has been estimated at 79 R☉.[3]
Properties
[edit]WR 101-2's spectral type is Ofpe/WN9,[3] signifying it as being a slash star, a Wolf-Rayet star which in this case contains extra nitrogen and helium emission in its spectrum as well as a P Cygni profile. Assuming a distance of 8,000 pc (appropriate as the massive star is apparently located in the Galactic Center, a structure known to be about 8,000 pc away), a K-band magnitude of 7.89, a K-band extinction of 1.7, and a K-band bolometric correction of -2.9, the luminosity turns out to be 2.4 million times that of the Sun (Log(L) = 6.38), making it one of the brightest stars known and certainly in the Galactic Center.[3]
WR 101-2's effective temperature was estimated to be about 20,000 K,[3] one of the coolest for any Wolf-Rayet star. The resulting radius for this is 129 R☉.
References
[edit]- ↑ "Wolf-Rayet Star Catalogue". pacrowther.staff.shef.ac.uk. Retrieved 2023-01-02.
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- 1 2 3 4 5 6 7 8 9 10 11 Mauerhan, J. C.; Muno, M. P.; Morris, M. R.; Stolovy, S. R.; Cotera, A. (2010-02-01). "Near-infrared Counterparts to Chandra X-ray Sources Toward the Galactic Center. II. Discovery of Wolf-Rayet Stars and O Supergiants". The Astrophysical Journal. 710 (1): 706–728. arXiv:0912.1055. Bibcode:2010ApJ...710..706M. doi:10.1088/0004-637X/710/1/706. ISSN 0004-637X. S2CID 32339182.
- ↑ "CXOGC+J174516.1-284909". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-06-30.
