Wikipedia
CS Camelopardalis
CS Camelopardalis (CS Cam) is a binary star in reflection nebula VdB 14, in the constellation Camelopardalis.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h 29m 04.13196s[1] |
| Declination | +59° 56′ 25.1970″[1] |
| Apparent magnitude (V) | 4.22[2] (4.19 - 4.23[3]) |
| Characteristics | |
| Spectral type | B9 Ia[4] |
| U−B color index | −0.23[2] |
| B−V color index | +0.41[2] |
| R−I color index | +0.38[2] |
| Variable type | α Cyg[5] |
| Astrometry | |
| Radial velocity (Rv) | −5.10[6] km/s |
| Proper motion (μ) | RA: −2.24[1] mas/yr Dec.: −0.90[1] mas/yr |
| Parallax (π) | 1.68 ± 0.50 mas[1] |
| Distance | 975[7] pc |
| Absolute magnitude (MV) | −7.10[7] |
| Details | |
| Mass | 19[8] M☉ |
| Radius | 85.7[8] R☉ |
| Luminosity | 75,900[9] L☉ |
| Surface gravity (log g) | 1.65[4] cgs |
| Temperature | 10,800[4] K |
| Rotational velocity (v sin i) | 30[10] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
It forms a group of stars known as the Camelopardalis R1 association, part of the Cam OB1 association. The near-identical supergiant CE Camelopardalis is located half a degree to the south.
A light curve for CS Camelopardalis, adapted from Morel et al. (2004)[11]
The primary component, CS Camelopardalis A, is a blue-white B-type supergiant with a mean apparent magnitude of 4.21m. It is classified as an Alpha Cygni type variable star and its brightness varies from magnitude 4.19m to 4.23m. Its companion, CS Camelopardalis B, is a magnitude 8.7m star located 2.4 arcseconds from the primary.[12]
References
- ^ a b c d e van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; Van Leeuwen, F.; Van Der Marel, H.; Mignard, F.; Murray, C. A.; Le Poole, R. S.; Schrijver, H.; Turon, C.; Arenou, F.; Froeschlé, M.; Petersen, C. S. (1997). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: 501. Bibcode:1997A&A...323L..49P.
- ^ a b c Firnstein, M.; Przybilla, N. (2012). "Quantitative spectroscopy of Galactic BA-type supergiants. I. Atmospheric parameters". Astronomy & Astrophysics. 543: A80. arXiv:1207.0308. Bibcode:2012A&A...543A..80F. doi:10.1051/0004-6361/201219034. S2CID 54725386.
- ^ 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. Bibcode:2009yCat....102025S.
- ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b Lyder, David A. (2001). "The Stars in Camelopardalis OB1: Their Distance and Evolutionary History". The Astronomical Journal. 122 (5): 2634–2643. Bibcode:2001AJ....122.2634L. doi:10.1086/323705.
- ^ a b Lamers, H. J. G. L. M. (1981). "Mass loss from O and B stars". Astrophysical Journal. 245: 593. Bibcode:1981ApJ...245..593L. doi:10.1086/158835.
- ^ McErlean, N. D.; Lennon, D. J.; Dufton, P. L. (1999). "Galactic B-supergiants: A non-LTE model atmosphere analysis to estimate atmospheric parameters and chemical compositions". Astronomy and Astrophysics. 349: 553. Bibcode:1999A&A...349..553M.
- ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
- ^ Morel, T.; Marchenko, S. V.; Pati, A. K.; Kuppuswamy, K.; Carini, M. T.; Wood, E.; Zimmerman, R. (June 2004). "Large-scale wind structures in OB supergiants: a search for rotationally modulated Hα variability". Monthly Notices of the Royal Astronomical Society. 351 (2): 552–568. arXiv:astro-ph/0403155. Bibcode:2004MNRAS.351..552M. doi:10.1111/j.1365-2966.2004.07799.x.
- ^ Dommanget, J.; et al. (2002). "Catalog of Components of Double & Multiple stars". Observations et Travaux. 54 (5). Bibcode:2002yCat.1274....0D.
External links
- Image CS Camelopardalis