White-hued star in the constellation Centaurus
Tau Centauri ,Latinized from τ Centauri, is a solitary[ 11] star in the southernconstellation ofCentaurus . It is visible to the naked eye with anapparent visual magnitude of +3.86.[ 2] parallax shift of 24.85 mas ,[ 1] light years . There is a 98% chance that it is a co-moving companion ofGamma Centauri ; the two stars have an estimated separation of 1.7 ly (0.53 pc).[ 12]
This is anA-type star withstellar classifications of A0 V[ 3] [ 4] main sequence star or a moreevolved subgiant star . It is around 132[ 7] projected rotational velocity of 296.8[ 9] oblate shape, with an estimated equatorial girth that is 30% larger than the polar radius.[ 13] [ 7] mass of the Sun and 2.2[ 8] Sun's radius .
^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 ^a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data , SIMBAD Astronomical Database,Bibcode :1986EgUBV........0M . ^a b Lagrange, A.-M.; et al. (February 2009), "Extrasolar planets and brown dwarfs around A-F type stars. VI. High precision RV survey of early type dwarfs with HARPS",Astronomy and Astrophysics ,495 (1):335– 352,arXiv :0809.4636 Bibcode :2009A&A...495..335L ,doi :10.1051/0004-6361:200810105 ,S2CID 62894956 . ^a b Gray, R. O.; Garrison, R. F. (July 1989), "The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation",Astrophysical Journal Supplement Series ,70 (4):623– 636,Bibcode :1989ApJS...70..623G ,doi :10.1086/191349 ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project",Astronomy & Astrophysics ,546 : 14,arXiv :1208.3048 Bibcode :2012A&A...546A..61D ,doi :10.1051/0004-6361/201219219 ,S2CID 59451347 , A61. ^a b 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 . ^a b c d e f 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 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)",Astronomy and Astrophysics ,367 (3rd ed.):521– 524,arXiv :astro-ph/0012289 Bibcode :2001A&A...367..521P ,doi :10.1051/0004-6361:20000451 ,S2CID 425754 . ^a b Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum",Astronomy & Astrophysics ,531 : A143,arXiv :1012.4858 Bibcode :2011A&A...531A.143D ,doi :10.1051/0004-6361/201016386 ,S2CID 119286673 . ^ "* tau Cen" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2017-01-13 .{{cite web }}: CS1 maint: postscript (link )^ De Rosa, R. J.; et al. (January 2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc",Monthly Notices of the Royal Astronomical Society ,437 (2):1216– 1240,arXiv :1311.7141 Bibcode :2014MNRAS.437.1216D ,doi :10.1093/mnras/stt1932 S2CID 88503488 . ^ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue",The Astrophysical Journal Supplement ,192 (1): 2,arXiv :1007.0425 Bibcode :2011ApJS..192....2S ,doi :10.1088/0067-0049/192/1/2 ,S2CID 119226823 ^ Belle, G. T. (2012), "Interferometric observations of rapidly rotating stars",The Astronomy and Astrophysics Review ,20 (1): 51,arXiv :1204.2572 Bibcode :2012A&ARv..20...51V ,doi :10.1007/s00159-012-0051-2 ,S2CID 119273474 .
