EO Aurigae

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EO Aurigae
EOAurLightCurve.png
The visual band light curve of EO Aurigae, adapted from Hartigan (1981) [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Auriga
Right ascension 05h 18m 21.06592s [2]
Declination +36° 37′ 55.3517″ [2]
Apparent magnitude  (V)7.71 [3]
Characteristics
Spectral type B3V + B3V [4]
U−B color index −0.63 [3]
B−V color index 0.08 [3]
Variable type Algol variable
Astrometry
Radial velocity (Rv)-1.1 [5] km/s
Proper motion (μ)RA: −1.67±1.71 [2] mas/yr
Dec.: −3.33±0.75 [2] mas/yr
Parallax (π)2.12±1.15  mas [2]
Distance approx. 1,500  ly
(approx. 500  pc)
Details
EO Aur A
Mass 6.22±0.73 [6]   M☉
Luminosity (bolometric)2,784 [6]   L☉
Temperature 13,360 [6]   K
Age 23.6±8.0 [4]   Myr
EO Aur B
Mass 5.00±2.57 [6]   M☉
Luminosity (bolometric)1377 [6]   L☉
Temperature 11,650 [6]   K
Other designations
BD+36° 1073, HD 34333, HIP 24744, SAO 57857.
Database references
SIMBAD data

EO Aurigae is an eclipsing binary of Algol type in the northern constellation of Auriga. With a combined apparent magnitude of 7.71, [3] it is too faint to be seen with the unaided eye.

The eclipsing binary nature of the star was detected in 1943 by Sergei Gaposchkin at Harvard College Observatory. [7] It consists of a pair of B-type main sequence stars orbiting each other with a period of 4.0656 days. During the eclipse of the primary star, the combined magnitude drops by 0.57; the eclipse of the secondary component drops the magnitude by 0.33. [8]

References

  1. ↑ Hartigan, P (January 1981). "A photoelectric lightcurve and elements of the eclipsing binary EO Aurigae". Journal of the AAVSO. 10: 13–20. Bibcode:1981JAVSO..10...13H . Retrieved 29 October 2021.
  2. 1 2 3 4 5 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. S2CID   18759600. Archived from the original on 2019-12-07. Retrieved 2013-08-23. Vizier catalog entry
  3. 1 2 3 4 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
  4. 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x . S2CID   118629873.
  5. ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W
  6. 1 2 3 4 5 6 Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv: 1003.2335 , Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID   111387483
  7. ↑ Gaposchkin, Sergei (1943). "A New Bright Eclipsing Variable of Large Mass, HV 10327". Publications of the Astronomical Society of the Pacific. 55 (325): 192–194. Bibcode:1943PASP...55..192G. doi: 10.1086/125543 .
  8. ↑ Malkov, O. Yu.; et al. (February 2006), "A catalogue of eclipsing variables", Astronomy and Astrophysics, 446 (2): 785–789, Bibcode:2006A&A...446..785M, doi: 10.1051/0004-6361:20053137 , hdl: 10995/73280

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