Astronomy:R Aurigae
| Observation data 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[2] mas |
| 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 | |
| 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
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 R Aur, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars , 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. doi:10.3847/1538-4357/adb8d9. Bibcode: 2025ApJ...982..201H.
- ↑ Skiff, B. A. (1994). "Photometry of Stars in the Field of R Aurigae". Information Bulletin on Variable Stars 4058: 1. Bibcode: 1994IBVS.4058....1S.
- ↑ 6.0 6.1 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.
- ↑ 7.0 7.1 "V* R Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+R+Aur.
- ↑ 8.0 8.1 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy & Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics 657: A7. doi:10.1051/0004-6361/202142146.
- ↑ 10.0 10.1 McDonald, I. et al. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M.
- ↑ 11.0 11.1 Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1–94. Bibcode: 1907AnHar..55....1C. https://articles.adsabs.harvard.edu/pdf/1907AnHar..55....1C. Retrieved 30 November 2024.
- ↑ "LPV of the Month December, 2016". https://www.aavso.org/lpv-month-december-2016.
- ↑ 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. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.
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