R Aurigae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 17m 17.6916s[2] |
| Declination | +53° 35′ 10.032″[2] |
| Apparent magnitude (V) | 6.7 to 13.9[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M7IIIe[5] (M6e - M9e)[3] |
| U−B color index | +0.27[6] |
| B−V color index | +1.66[6] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | 7.8±2[7] km/s |
| Proper motion (μ) | RA: +14.708[2] mas/yr Dec.: −14.685[2] mas/yr |
| Parallax (π) | 3.4958±0.1327 mas[2] |
| Distance | 930 ± 40 ly (290 ± 10 pc) |
| Details | |
| Mass | 3.7[8] M☉ |
| Radius | 740[9] R☉ |
| Luminosity | 11,530[10] L☉ |
| Surface gravity (log g) | 1.60[8] cgs |
| Temperature | 2,385[10] K |
| Other designations | |
| R Aur, ADS 3845 A, BD+53 882, CCDM J05173+5335A, GC 6435, HD 34019, HIP 24645, HR 1707, IDS 05092+5328 A, SAO 25112[7] | |
| Database references | |
| SIMBAD | data |
R Aurigae (R Aur) is a Mira variable, a pulsating red giant star in the constellation of Auriga, at a distance of 930 light-years.
In 1862 R Aurigae was found to be a variable star at Bonn Observatory.[11] It was widely observed in the late 19th century and its spectrum was described in 1890.[12] In 1907 it appeared with its variable star designation in Annie Jump Cannon's Second Catalogue of Variable Stars.[11] R Aurigae has an apparent visual magnitude which varies between 6.7 and 13.9 with a period of 450 days.[3] The light curve varies strongly from cycle to cycle, sometimes having a pronounced hump on the ascending branch and usually having rise and fall times approximately equal. The cycle period has oscillated slowly between about 450 and 465 days.
R Aurigae is catalogued as a component of a double star, with the 10th magnitude HD 233095, although the two stars are unrelated.[13]
References
[edit]- ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
- ^ a b c d e 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 R Aur, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Archived 2017-06-20 at the Wayback Machine, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 10, 2009.
- ^ Hoai, Do Thi; Nhung, Pham Tuyet; Darriulat, Pierre; Tan, Mai Nhat (2025). "Stellar Evolution Along the Asymptotic Giant Branch as Revealed by the Shape of Miras' Visual Light Curves". The Astrophysical Journal. 982 (2): 201. arXiv:2411.18044. Bibcode:2025ApJ...982..201H. doi:10.3847/1538-4357/adb8d9.
- ^ Skiff, B. A. (1994). "Photometry of Stars in the Field of R Aurigae". Information Bulletin on Variable Stars. 4058: 1. Bibcode:1994IBVS.4058....1S.
- ^ a b HR 1707, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 10, 2009.
- ^ a b "V* R Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 24, 2021.
- ^ a b Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy & Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
- ^ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. doi:10.1051/0004-6361/202142146.
- ^ a b McDonald, I.; et al. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
- ^ a b Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 30 November 2024.
- ^ "LPV of the Month December, 2016". Retrieved 2021-02-24.
- ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
