EZ Canis Majoris
EZ Canis Majoris
Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS) |
| Constellation |
Canis Major |
| Right ascension |
06h 54m 13.0441s[1] |
| Declination |
−23° 55′ 42.011″[1] |
| Apparent magnitude (V) |
6.71 to 6.95[2] |
| Characteristics |
| Spectral type |
WN4[1] |
| U−B color index |
−0.89[3] |
| B−V color index |
−0.28[3] |
| R−I color index |
+0.06[3] |
| Variable type |
WR[2] |
| Astrometry |
|
| Proper motion (μ) |
RA: −3.86[1] mas/yr
Dec.: 4.75[1] mas/yr |
| Parallax (π) |
1.74 ± 0.76[1] mas |
| Distance |
5,900 ly
(1,800[4] pc) |
| Absolute magnitude (MV) |
−4.6[4] |
|
| Details |
|
| Mass |
20[5] M☉ |
| Radius |
2.9[4] R☉ |
| Luminosity (bolometric) |
380,000[4] L☉ |
| Temperature |
85,000[4] K |
|
| Other designations |
EZ CMa, ALS 98, CD−23°4553, CEL 1426, Collinder 121 4, CPD−23°1588, GC 9061, HD 50896, Hen 3-20, HIP 33165, HR 2583, LBN 1052, LMA IC 1613 10, MR 6, PPM 251223, SAO 172546, SH 2-308, TYC 6522-3270-1. [1] |
| Database references |
| SIMBAD |
data |
EZ Canis Majoris (EZ CMa) is a Wolf-Rayet star in the constellation of Canis Major.[1] It has an apparent visual magnitude which varies between 6.71 and 6.95.[2]
References
- ^ a b c d e f g h V* EZ CMa -- Wolf-Rayet Star, database entry, SIMBAD. Accessed on line November 20, 2008.
- ^ a b c EZ CMa, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 20, 2008.
- ^ a b c HR 2583, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 20, 2008.
- ^ a b c d e Spitzer Space Telescope Infrared Spectrograph (IRS) Spectroscopy of the Prototype Wolf-Rayet Star EZ Canis Majoris (HD 50896), Patrick W. Morris, Paul A. Crowther, and Jim R. Houck, Astrophysical Journal Supplement Series 154, #1 (September 2004), pp. 413–417, doi:10.1086/422878, Bibcode: 2004ApJS..154..413M. Stellar parameters are in Table 1.
- ^ §6, Photon loss from the helium Lyα line — the key to the acceleration of Wolf-Rayet winds, W. Schmutz, Astronomy and Astrophysics 321 (May 1997), pp. 268–287, Bibcode: 1997A&A...321..268S.