HD 34626
HD 34626, also known as MZ Aurigae, is an unusual variable star in the northern constellation of Auriga. It varies in brightness by 0.1 magnitude over time scales of 8 to 12 hours, but these variations are not periodic. This indicates the variability is not caused by ellipsoidal effects, and the nature of the variability remains unknown. It is a Be star and is rotating rapidly.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 20m 33.03671s[1] |
| Declination | +36° 37′ 56.0298″[1] |
| Apparent magnitude (V) | 8.16[2] |
| Characteristics | |
| Spectral type | B1.5 IVnp[3] |
| U−B color index | −0.68[4] |
| B−V color index | +0.03[4] |
| Astrometry | |
| Radial velocity (Rv) | -6[5] km/s |
| Proper motion (μ) | RA: +0.56[1] mas/yr Dec.: -3.87[1] mas/yr |
| Parallax (π) | 2.07 ± 0.86[1] mas |
| Distance | approx. 1,600 ly (approx. 500 pc) |
| Details | |
| Mass | 7.30±0.48[2] M☉ |
| Luminosity | 1,897[2] L☉ |
| Temperature | 22,675[2] K |
| Rotational velocity (v sin i) | 310[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- 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:10.1051/0004-6361:20078357Vizier catalog entry
- Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349–360, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355
- Walborn, N. R. (1971). "Some Spectroscopic Characteristics of the OB Stars: An Investigation of the Space Distribution of Certain OB Stars and the Reference Frame of the Classification". The Astrophysical Journal Supplement Series. 23: 257. Bibcode:1971ApJS...23..257W. doi:10.1086/190239.
- Deutschman, W. A.; Davis, R. J.; Schild, R. E. (February 1976), "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-beta photoelectric observations", Astrophysical Journal Supplement Series, 30: 97–225, Bibcode:1976ApJS...30...97D, doi:10.1086/190359
- Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- Percy, J. R. (December 1984), "Five suspected Beta Cephei stars revisited", Journal of the Royal Astronomical Society of Canada, 78: 241–250, Bibcode:1984JRASC..78..241P
External links
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.