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134 Tauri
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 49m 32.92974s[1] |
| Declination | +12° 39′ 04.7582″[1] |
| Apparent magnitude (V) | 4.89[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9 IV[4] |
| B−V color index | −0.068±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +20.5±0.1[5] km/s |
| Proper motion (μ) | RA: −22.98[1] mas/yr Dec.: −18.22[1] mas/yr |
| Parallax (π) | 13.11±0.33 mas[1] |
| Distance | 249 ± 6 ly (76 ± 2 pc) |
| Absolute magnitude (MV) | +0.48[2] |
| Details | |
| Mass | 2.99[6] M☉ |
| Radius | 2.82[7] R☉ |
| Luminosity | 88[7] L☉ |
| Surface gravity (log g) | 3.97[7] cgs |
| Temperature | 10,520[7] K |
| Rotational velocity (v sin i) | 26[6] km/s |
| Age | 248[6] Myr |
| Other designations | |
| 134 Tau, BD+12°912, HD 38899, HIP 27511, HR 2010, SAO 94888, WDS J05495+1239A[8] | |
| 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,[4] 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[4] of 26 km/s.[6] The star is about 248 million years old with three times the mass of the Sun[6] and approximately 2.8 times the Sun's radius.[7] It is radiating around 88 times the Sun's luminosity from its photosphere at an effective temperature of about 10,520 K.[7]
References
[edit]- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c d e Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b c 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, Bibcode:1994AJ....107.1556G, doi:10.1086/116967.
- ^ De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347
- ^ a b c d e 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ a b c d e f Stassun, Keivan G.; et al. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
- ^ "134 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-28.
- ^ 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, arXiv:1205.5238, Bibcode:2012MNRAS.424.1925C, doi:10.1111/j.1365-2966.2012.21317.x, S2CID 119120749.
