Astronomy:134 Tauri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 49m 32.92974s[1] |
| Declination | +12° 39′ 04.7582″[1] |
| Apparent magnitude (V) | 4.89[2] |
| Characteristics | |
| Spectral type | B9 IV[3] |
| B−V color index | −0.068±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +20.5±0.1[4] km/s |
| Proper motion (μ) | RA: −22.98[1] mas/yr Dec.: −18.22[1] mas/yr |
| Parallax (π) | 13.11 ± 0.33[1] mas |
| Distance | 249 ± 6 ly (76 ± 2 pc) |
| Absolute magnitude (MV) | +0.48[2] |
| Details[5] | |
| Mass | 2.99 M☉ |
| Radius | 3.3[6] R☉ |
| Luminosity | 78.3+4.5 −8.8[7] L☉ |
| Surface gravity (log g) | 4.02±0.14 cgs |
| Temperature | 11,150±379 K |
| Rotational velocity (v sin i) | 26 km/s |
| Age | 248 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
134 Tauri is a single[9] star in the zodiac constellation of Taurus. Its apparent magnitude is 4.89,[2] which is bright enough to be faintly visible to the naked eye. The distance to this star, based upon an annual parallax shift of 13.11±0.33 mas,[1] is around 249 light years. The star is moving further from the Sun with a heliocentric radial velocity of +20.5 km/s, having made its closest approach some three million years ago at a distance of 107 ly (32.7 pc).[2]
This is an MK-standard star with a stellar classification of B9 IV,[3] matching a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core. It has a low projected rotational velocity[3] of 26 km/s.[5] The star is about 248 million years old with three[5] times the mass of the Sun and approximately 3.3 times the Sun's radius.[6] It is radiating around 78[7] times the Sun's luminosity from its photosphere at an effective temperature of about 11,150 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 Garrison, R. F.; Gray, R. O. (1994), "The late B-type stars: Refined MK classification, confrontation with stromgren photometry, and the effects of rotation", The Astronomical Journal 107: 1556, doi:10.1086/116967, Bibcode: 1994AJ....107.1556G.
- ↑ De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: A61, doi:10.1051/0004-6361/201219219, Bibcode: 2012A&A...546A..61D
- ↑ 5.0 5.1 5.2 5.3 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.
- ↑ 6.0 6.1 Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics 367: 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 7.0 7.1 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ "134 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=134+Tau.
- ↑ Chini, R. et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society 424 (3): 1925–1929, doi:10.1111/j.1365-2966.2012.21317.x, Bibcode: 2012MNRAS.424.1925C.
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