EO Aurigae
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
Right ascension | 05h 18m 21.06592s[1] |
Declination | +36° 37′ 55.3517″[1] |
Apparent magnitude (V) | 7.71[2] |
Characteristics | |
Spectral type | B3V + B3V[3] |
U−B color index | −0.63[2] |
B−V color index | 0.08[2] |
Variable type | Algol variable |
Astrometry | |
Radial velocity (Rv) | -1.1[4] km/s |
Proper motion (μ) | RA: ±1.71 −1.67[1] mas/yr Dec.: ±0.75 −3.33[1] mas/yr |
Parallax (π) | 2.12 ± 1.15[1] mas |
Distance | approx. 1,500 ly (approx. 500 pc) |
Details | |
EO Aur A | |
Mass | ±0.73 6.22[5] M☉ |
Luminosity (bolometric) | 2,784[5] L☉ |
Temperature | 13,360[5] K |
Age | ±8.0 23.6[3] Myr |
EO Aur B | |
Mass | ±2.57 5.00[5] M☉ |
Luminosity (bolometric) | 1377[5] L☉ |
Temperature | 11,650[5] K |
Other designations | |
Database references | |
SIMBAD | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
EO Aurigae is an eclipsing binary of Algol type in the northern constellation of Auriga. With a combined apparent magnitude of 7.71,[2] 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.[6] 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.[7]
References
- 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. Vizier catalog entry
- 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
- 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: 190. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.
- ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W
- 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
- ↑ 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.
- ↑ 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
External links
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