LY Aurigae

LY Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 29m 42.650s[1]
Declination +35° 22′ 30.09″[1]
Apparent magnitude (V) 6.85 (combined)
Characteristics
Spectral type O9III+O9.5eaIII+B0V[2]
B−V color index -0.3
Variable type Beta Lyrae variable
Astrometry
Radial velocity (Rv)-29 km/s
Proper motion (μ) RA: -0.20 ± 3.19[1] mas/yr
Dec.: -1.17 ± 2.07[1] mas/yr
Parallax (π)3.28 ± 2.40[1] mas
Distanceapprox. 1,000 ly
(approx. 300 pc)
Absolute magnitude (MV)−4.7 + −4.07 + ~−3.3[3]
Details
Mass24+13+?[3] M☉
Radius14.9+13.4+?[3] R☉
Luminosity90,000+60,000+~20,000[3] L☉
Temperature33,000[4] K
Other designations
BD+35° 1137, HD 35921, SAO 58105, HIP 25733
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

LY Aurigae is an eclipsing binary[5] variable star of Beta Lyr type in the constellation Auriga, plus a third fainter companion. All three are hot massive main sequence or slightly evolved stars, very luminous but emitting most of their energy in the ultraviolet.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (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. Vizier catalog entry
  2. ↑ Zasche, P.; Wolf, M.; Hartkopf, W. I.; Svoboda, P.; Uhlař, R.; Liakos, A.; Gazeas, K. (2009). "A Catalog of Visual Double and Multiple Stars with Eclipsing Components". The Astronomical Journal 138 (2): 664. arXiv:0907.5172. Bibcode:2009AJ....138..664Z. doi:10.1088/0004-6256/138/2/664.
  3. ↑ 3.0 3.1 3.2 3.3 Stickland, D. J. et al. (1994). "Spectroscopic binary orbits from ultraviolet radial velocities. Paper 15: LY Aurigae (HD 35921)". The Observatory 114: 107–113. Bibcode:1994Obs...114..107S.
  4. ↑ Bieging, J. H.; Abbott, D. C.; Churchwell, E. B. (1989). "A survey of radio emission from Galactic OB stars". The Astrophysical Journal 340: 518. Bibcode:1989ApJ...340..518B. doi:10.1086/167414.
  5. ↑ Mayer, Pavel (1968). "The Eclipsing Variable HD 35921". Publications of the Astronomical Society of the Pacific 80 (472): 81–44. Bibcode:1968PASP...80...81M. doi:10.1086/128588.

See also