WR 25

WR 25
Location of WR 25 (circled)
Credit: ESO
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 44m 10.337s[1]
Declination −59° 43′ 11.41″[1]
Apparent magnitude (V) 8.80[2]
Characteristics
Evolutionary stage Wolf-Rayet star
Spectral type O2.5If*/WN6 + OB[3]
Astrometry
Radial velocity (Rv)−34.6[4] km/s
Proper motion (μ) RA: -6.918[5] mas/yr
Dec.: 2.764[5] mas/yr
Parallax (π)0.4450 ± 0.0203 mas[5]
Distance1,970+180
−150[6] pc
Absolute magnitude (MV)–6.98[7]
Orbit[4]
Period (P)207.85 days
Semi-major axis (a)156 R☉
Eccentricity (e)0.50
Semi-amplitude (K1)
(primary)		44 km/s
Details
WR
Mass98[7] M☉
Radius20.24[7] R☉
Luminosity (bolometric)2,400,000[7] L☉
Temperature50,100[7] K
Other designations
HD 93162, 2MASS J10441038-5943111, WR 25, XMMU J104410.3-594311, CD−59°3282, PPM 339385, SAO 238408, Trumpler 16 177, GSC 08626-01989, UBV 9882, Hen 3-478
Database references
SIMBADdata

WR 25 (HD 93162) is a binary star system in the turbulent star-forming region the Carina Nebula, about 6,800 light-years from Earth. It contains a Wolf-Rayet star and a hot luminous companion and is a member of the Trumpler 16 cluster. The name comes from the Catalogue of Galactic Wolf–Rayet Stars.

  1. ^ a b Roeser, S.; Bastian, U. (1988). "A new star catalogue of SAO type". Astronomy and Astrophysics Supplement Series. 74: 449. Bibcode:1988A&AS...74..449R. ISSN 0365-0138.
  2. ^ 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: 0. Bibcode:2002yCat.2237....0D.
  3. ^ Sota, A.; Maíz Apellániz, J.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J. (2014). "The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars". The Astrophysical Journal Supplement. 211 (1): 10. arXiv:1312.6222. Bibcode:2014ApJS..211...10S. doi:10.1088/0067-0049/211/1/10. S2CID 118847528.
  4. ^ a b Cite error: The named reference gamen was invoked but never defined (see the help page).
  5. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ Crowther, Paul A.; Rate, Gemma (2020). "Unlocking Galactic Wolf–Rayet stars with Gaia DR2 – I. Distances and absolute magnitudes". Monthly Notices of the Royal Astronomical Society. 493 (1): 1512–1529. arXiv:1912.10125. Bibcode:2020MNRAS.493.1512R. doi:10.1093/mnras/stz3614. S2CID 209444955.
  7. ^ a b c d e Sota, A.; Maíz Apellániz, J.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J.; Oskinova, L. M. (2019). "The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters". Astronomy & Astrophysics. A57: 625. arXiv:1904.04687. Bibcode:2019A&A...625A..57H. doi:10.1051/0004-6361/201834850. S2CID 104292503.