X Persei
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h55m23.08s |
| Declination | +31°02′45.1″ |
| Apparent magnitude (V) | 6.79 |
| Characteristics | |
| Spectral type | O9.5IIIe-B0Ve |
| Astrometry | |
| Distance | 2694 ly |
| Absolute magnitude (MV) | −2.80 |
| Orbit | |
| Companion | X Persei B |
| Period (P) | 0.685 yr |
| Semi-major axis (a) | 2 AU" |
| Details | |
| Mass | 15 M☉ |
| Radius | 6 R☉ |
| Luminosity | 24,000 L☉ |
| Temperature | 29,500 K |
| Age | <10,000,000 years |
X Persei is a binary star system located in the constellation Perseus. X Persei A is either an O-type giant or a B-type main sequence star, which is orbited by a Neutron Star (X Persei B).[1][2] With an apparent magnitude of 6.72, it is too dim to seen even on the best nights.[2] The system is an X-ray source and the primary star appears to be suffering from substantial mass loss.[3]
References
- ↑ Delgado‐Marti, H.; Levine, A. M.; Pfahl, E.; Rappaport, S. A. (2001). "The Orbit of X Persei and Its Neutron Star Companion". The Astrophysical Journal 546: 455. arXiv:astro-ph/0004258. Bibcode:2001ApJ...546..455D. doi:10.1086/318236.
- ↑ 2.0 2.1 "V* X Per – High Mass X-ray Binary". SIMBAD. Retrieved 8 February 2013.
- ↑ White, N. E.; Swank, J. H.; Holt, S. S.; Parmar, A. N. (1 December 1982). "A comparaison of the X-ray properties of X Persei and Gamma Cassiopeiae" 263. Astrophysical Journal. pp. 277–288.
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