Astronomy:71 Tauri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 26m 20.77302s[2] |
| Declination | +15° 37′ 05.7885″[2] |
| Apparent magnitude (V) | +4.48[3] |
| Characteristics | |
| Spectral type | F0 V[4] |
| U−B color index | +0.13[3] |
| B−V color index | +0.25[3] |
| Variable type | δ Sct[5] |
| Astrometry | |
| Radial velocity (Rv) | +38.3[6] km/s |
| Proper motion (μ) | RA: +85.393[2] mas/yr Dec.: −14.869[2] mas/yr |
| Parallax (π) | 22.4141 ± 0.4969[2] mas |
| Distance | 146 ± 3 ly (44.6 ± 1.0 pc) |
| Absolute magnitude (MV) | 1.10[7] |
| Details | |
| Mass | 1.94[7] M☉ |
| Radius | 3.34[4] R☉ |
| Surface gravity (log g) | 3.73[8] cgs |
| Temperature | 7,543[4] K |
| Rotation | 14.2[7] d |
| Rotational velocity (v sin i) | 192[7] km/s |
| Age | 966[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
71 Tauri is a suspected triple star[10] system in the zodiac constellation Taurus, located 146 light years from the Sun.[2] It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of +4.48.[3] The star is moving further away from the Earth with a heliocentric radial velocity of +38 km/s.[6] It is a member of the Hyades open cluster.[11]
The primary component is an F-type main-sequence star with a stellar classification of F0 V.[4] It is a Delta Scuti variable with an amplitude of 0.02 in magnitude and a frequency of 0.16 d−1.[5] This star has about 1.94[7] times the mass of the Sun and 3.34[4] times the Sun's radius. It has a projected rotational velocity of 192 km s−1, for an estimated rotation period of 14.2 days.[7] Extreme ultraviolet flares have been observed coming from this star's hot corona,[4] and it is the second brightest X-ray source in the Hyades.[11]
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 2.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Mullan, D. J.; Mathioudakis, M. (November 2000), "Extreme-Ultraviolet Flares in an F2 Star", The Astrophysical Journal 544 (1): 475–480, doi:10.1086/317202, Bibcode: 2000ApJ...544..475M.
- ↑ 5.0 5.1 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.
- ↑ 6.0 6.1 Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick, eds., "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (University of Toronto: International Astronomical Union) 30: p. 57, Bibcode: 1967IAUS...30...57E.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics 361: 614–628, Bibcode: 2000A&A...361..614P.
- ↑ 8.0 8.1 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ "71 Tau -- Variable Star of delta Sct type", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=71+tauri, retrieved 2007-01-25
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ 11.0 11.1 Simon, Theodore; Ayres, Thomas R. (August 2000), "71 Tauri: Hyades Enigma Resolved?", The Astrophysical Journal 539 (1): 325–330, doi:10.1086/309228, Bibcode: 2000ApJ...539..325S.
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