EO Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 18m 21.0672s[2] |
| Declination | +36° 37′ 55.362″[2] |
| Apparent magnitude (V) | 7.71[3] |
| Characteristics | |
| Spectral type | B3V + B3V[4] |
| Apparent magnitude (G) | 7.69[2] |
| 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: −0.479±0.034[2] mas/yr Dec.: −2.954±0.026[2] mas/yr |
| Parallax (π) | 0.9420±0.0306 mas[2] |
| Distance | 3,500 ± 100 ly (1,060 ± 30 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) | 1,377[6] L☉ |
| Temperature | 11,650[6] K |
| Other designations | |
| BD+36° 1073, HD 34333, HIP 24744, SAO 57857, Gaia DR3 187043317482036224. | |
| 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
- ^ 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.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d 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
- ^ a b 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.
- ^ 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
- ^ a b c d e f 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
- ^ 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, hdl:10995/73280