Astronomy:V471 Tauri
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Short description: Variable star in the constellation Taurus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 50m 24.9667s[2] |
| Declination | 17° 14′ 47.431″[2] |
| Apparent magnitude (V) | 9.40 - 9.71[3] |
| Characteristics | |
| Evolutionary stage | K2V + D2[4] |
| Variable type | Algol + RS CVn[3] |
| Astrometry | |
| Radial velocity (Rv) | 37.4±0.5[5] km/s |
| Proper motion (μ) | RA: 127.278[2] mas/yr Dec.: −22.321[2] mas/yr |
| Parallax (π) | 21.0129 ± 0.0158[2] mas |
| Distance | 155.2 ± 0.1 ly (47.59 ± 0.04 pc) |
| Orbit[6] | |
| Period (P) | 0.52118 days |
| Semi-major axis (a) | 0.01496 AU |
| Eccentricity (e) | 0 (assumed) |
| Inclination (i) | 80.8° |
| Details | |
| White dwarf | |
| Mass | 0.792[6] M☉ |
| Radius | 0.01134[6] R☉ |
| Luminosity | 0.145[7] L☉ |
| Surface gravity (log g) | 8.227[6] cgs |
| Temperature | 34,500[7] K |
| K star | |
| Mass | 0.852[6] M☉ |
| Radius | 0.816[6] R☉ |
| Luminosity | 0.41[8] L☉ |
| Surface gravity (log g) | 4.49[9] cgs |
| Temperature | 5,066[9] K |
| Rotation | 0.5211 days[8] |
| Rotational velocity (v sin i) | 89.30[9] km/s |
| Age | 625[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
V471 Tauri (short V471 Tau) is a eclipsing variable star in the constellation of Taurus. The star has a visual magnitude of 9 which makes it impossible to see with the naked eye. It is around 155 light-years away from the Solar System.
Physical properties
The V471 Tauri system has at least two members: a white dwarf star of spectral type D2; and a K-type main sequence star (K2 V). There are variations in the timing of the eclipses that were once thought to be due to a third member of the system, proposed to be a brown dwarf, but this has been ruled out and the eclipse variations may be caused by the Applegate mechanism. The system is located in the Hyades star cluster.[6]
References
- ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html.
- ↑ 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 Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
- ↑ Hussain, G. A. J.; Allende Prieto, C.; Saar, S. H.; Still, M. (2006). "Spot patterns and differential rotation in the eclipsing pre-cataclysmic variable binary, V471 Tau". Monthly Notices of the Royal Astronomical Society 367 (4): 1699–1708. doi:10.1111/j.1365-2966.2006.10073.x. Bibcode: 2006MNRAS.367.1699H.
- ↑ Karataș, Yüksel; Bilir, Selçuk; Eker, Zeki; Demircan, Osman; Liebert, James; Hawley, Suzanne L.; Fraser, Oliver J.; Covey, Kevin R. et al. (2004). "Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution". Monthly Notices of the Royal Astronomical Society 349 (3): 1069–1092. doi:10.1111/j.1365-2966.2004.07588.x. Bibcode: 2004MNRAS.349.1069K.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Muirhead, Philip S.; Nordhaus, Jason; Drout, Maria R. (2022). "Revised Stellar Parameters for V471 Tau, A Post-common Envelope Binary in the Hyades". The Astronomical Journal 163 (1): 34. doi:10.3847/1538-3881/ac390f. Bibcode: 2022AJ....163...34M.
- ↑ 7.0 7.1 Vaccaro, T. R.; Wilson, R. E.; Van Hamme, W.; Terrell, Dirk (2015). "The V471 Tauri System: A Multi-data-type Probe". The Astrophysical Journal 810 (2): 157. doi:10.1088/0004-637X/810/2/157. Bibcode: 2015ApJ...810..157V.
- ↑ 8.0 8.1 Kővári, Zs; Kriskovics, L.; Oláh, K.; Odert, P.; Leitzinger, M.; Seli, B.; Vida, K.; Borkovits, T. et al. (2021). "A confined dynamo: Magnetic activity of the K-dwarf component in the pre-cataclysmic binary system V471 Tauri". Astronomy and Astrophysics 650: A158. doi:10.1051/0004-6361/202140707. Bibcode: 2021A&A...650A.158K.
- ↑ 9.0 9.1 9.2 9.3 Zaire, B.; Donati, J. -F.; Klein, B. (2021). "Magnetic field and activity phenomena of the K2 dwarf V471 Tau". Monthly Notices of the Royal Astronomical Society 504 (2): 1969. doi:10.1093/mnras/stab1019. Bibcode: 2021MNRAS.504.1969Z.
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