Beta Canis Majoris
Location of β Canis Majoris (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 22m 41.98535s[1] |
| Declination | −17° 57′ 21.3073″[1] |
| Apparent magnitude (V) | 1.985[2] (1.97 - 2.01[3]) |
| Characteristics | |
| Spectral type | B1 II-III[4] |
| U−B color index | −0.99[2] |
| B−V color index | −0.235[2] |
| Variable type | β Cep[5] |
| Astrometry | |
| Radial velocity (Rv) | +33.7[6] km/s |
| Proper motion (μ) | RA: −3.23[1] mas/yr Dec.: −0.78[1] mas/yr |
| Parallax (π) | 6.62 ± 0.22[1] mas |
| Distance | 490 ± 20 ly (151 ± 5 pc) |
| Absolute magnitude (MV) | −4.1[7] |
| Details | |
| Mass | 12 or 12.6[8] M☉ |
| Radius | 7.4 or 8.2[8] R☉ |
| Luminosity | 25,700+3,800 −3,300[9] L☉ |
| Surface gravity (log g) | 3.78±0.08[8] cgs |
| Temperature | 24,700±300[9] K |
| Metallicity [Fe/H] | 0.04 ± 0.10[10] dex |
| Rotation | 13.6±1.2[8] days |
| Rotational velocity (v sin i) | 31 ± 5[10] km/s |
| Age | 12.2 or 13.8[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Canis Majoris, also called Mirzam,[13] is a star in the southern constellation of Canis Major, the "Great Dog". It is around 500 light-years (150 parsecs) from the Sun.[1] In the constellation it looks like it is in the dog's front leg.
References[change]
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
- ↑ 2.0 2.1 2.2 Cousins, A. W. J. (1972), "UBV Photometry of Some Very Bright Stars", Monthly Notes of the Astronomical Society of Southern Africa, 31: 69, Bibcode:1972MNSSA..31...69C
- ↑ Balona, L. A.; Bregman, L.; Letsapa, B. A.; Magoro, B. T.; Walsh, S. E. (1996). "The Pulsation Frequencies of beta CMa". Information Bulletin on Variable Stars. 4313: 1. Bibcode:1996IBVS.4313....1B.
- ↑ Abt, Helmut A.; et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590
- ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S.
- ↑ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Washington, Bibcode:1953GCRV..C......0W
- ↑ Shobbrook, R. R.; Handler, G.; Lorenz, D.; Mogorosi, D. (2006). "Photometric studies of three multiperiodic β Cephei stars: β CMa, 15 CMa and KZ Mus". Monthly Notices of the Royal Astronomical Society. 369 (1): 171–181. arXiv:astro-ph/0603754. Bibcode:2006MNRAS.369..171S. doi:10.1111/j.1365-2966.2006.10289.x. S2CID 18593836.
- ↑ 8.0 8.1 8.2 8.3 8.4 Fossati, L.; Castro, N.; Morel, T.; Langer, N.; Briquet, M.; Carroll, T. A.; Hubrig, S.; Nieva, M. F.; Oskinova, L. M.; Przybilla, N.; Schneider, F. R. N.; Schöller, M.; Simón-Díaz, S.; Ilyin, I.; de Koter, A. (2015-02-01). "B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars β CMa and ɛ CMa. Possible lack of a "magnetic desert" in massive stars". Astronomy and Astrophysics. 574: A20. arXiv:1411.6490. Bibcode:2015A&A...574A..20F. doi:10.1051/0004-6361/201424986. ISSN 0004-6361.
- ↑ 9.0 9.1 Shultz, M. E.; Wade, G. A.; Rivinius, Th; Alecian, E.; Neiner, C.; Petit, V.; Wisniewski, J. P.; MiMeS Collaboration; BinaMIcS Collaboration (2019), "The magnetic early B-type Stars II: Stellar atmospheric parameters in the era of Gaia", Monthly Notices of the Royal Astronomical Society, 485 (2): 1508, arXiv:1902.02713, Bibcode:2019MNRAS.485.1508S, doi:10.1093/mnras/stz416, S2CID 119463660
- ↑ 10.0 10.1 Mazumdar, A.; et al. (November 2006), "An asteroseismic study of the β Cephei star β Canis Majoris", Astronomy and Astrophysics, 459 (2): 589–596, arXiv:astro-ph/0607261, Bibcode:2006A&A...459..589M, doi:10.1051/0004-6361:20064980, S2CID 11807580
- ↑ Allen, Richard Hinckley (1899), "Star-names and their meanings", New York: 129–130, Bibcode:1899sntm.book.....A
- ↑ "V* bet CMa -- Variable Star of beta Cep type", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-02
- ↑ "IAU Catalog of Star Names". Retrieved 28 July 2016.
