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Tau Tauri

October 20, 2023

Not to be confused with T Tauri.

Tau Tauri, Latinized from τ Tauri, is a quadruple star system[5] in the constellation Taurus. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.33.[14] The distance to this system is approximately about 400 light years based on parallax.[1] The system is moving further from the Earth with a heliocentric radial velocity of +14.6 km/s,[7] and it is a member of the Taurion OB association, located between Orion and Taurus.[15] It is located 0.7 degree north of the ecliptic, and thus is subject to lunar occultations.[4]

Tau Tauri
Location of τ Tauri (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 42m 14.70161s[1]
Declination 22° 57′ 24.9214″[1]
Apparent magnitude (V) 4.27[2]
Characteristics
Spectral type B3V[3] + ? + A0V–A2V[4] + A1V[5]
U−B color index -0.57[6]
B−V color index -0.14[6]
Astrometry
Radial velocity (Rv)+14.60[7] km/s
Proper motion (μ) RA: -2.89[1] mas/yr
Dec.: -21.86[1] mas/yr
Parallax (π)8.19 ± 0.88 mas[1]
Distanceapprox. 400 ly
(approx. 120 pc)
Absolute magnitude (MV)-1.15[2]
Orbit[8]
PrimaryAa
Period (P)2.956549±0.000002 d
Semi-major axis (a)≤ 0.01455 AU
Eccentricity (e)0.051±0.019
Periastron epoch (T)2,436,424.207±0.009 JD
Argument of periastron (ω)
(secondary)		126.7±21.8°
Semi-amplitude (K1)
(primary)		53.6±1.0 km/s
Details
Aa
Mass6.4[9] M☉
Luminosity1,472[10] L☉
Surface gravity (log g)2.60[11] cgs
Temperature18,700[10] K
Metallicity [Fe/H]-0.51[11] dex
Rotational velocity (v sin i)115[12] km/s
Other designations
τ Tau, 94 Tauri, BD+22°739, FK5 174, GC 5716, HD 29763, HIP 21881, HR 1497, SAO 76721, CCDM J04422+2257AB, WDS J04422+2257A, GSC 01830-02129[13]
Database references
SIMBADdata

The blue-white hued primary, component Aa, is a B-type main-sequence star with a stellar classification of B3V.[3] It was found to be a close spectroscopic binary in 1903 by American astronomers Edwin B. Frost and Walter S. Adams. The pair have an orbital period of 2.96 days and eccentricity of 0.05.[8] A second companion, white-hued component Ab, has magnitude 6.97 and angular separation 0.2" from the primary in a 58-year orbit.[16][5] This is a probably A-type main-sequence star with a class of A0V–A2V.[4] The more distant component B is a type A1V star with magnitude 7.2 and separation 62.8".[5]

References Edit

  1. ^ 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. Vizier catalog entry
  2. ^ 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. Vizier catalog entry
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. ^ a b c Richichi, A.; et al. (June 1994). "New binary stars discovered by lunar occultations". Astronomy and Astrophysics. 286: 829–837. Bibcode:1994A&A...286..829R.
  5. ^ a b c d Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976. Vizier catalog entry
  6. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  7. ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. ISBN 9780598216885. LCCN 54001336.
  8. ^ a b Petrie, R. M.; Ebbighausen, E. G. (1961). "The spectroscopic binary Boss 1107". Publications of the Dominion Astrophysical Observatory Victoria. 11: 385–394. Bibcode:1961PDAO...11..385P.
  9. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873. Vizier catalog entry
  10. ^ a b Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. S2CID 111387483. Vizier catalog entry
  11. ^ a b Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. S2CID 53480665.
  12. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  13. ^ "tau Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-10-18.{{cite web}}: CS1 maint: postscript (link)
  14. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
  15. ^ Bouy, H.; Alves, J. (December 2015). "Cosmography of OB stars in the solar neighbourhood". Astronomy & Astrophysics. 584: 13. Bibcode:2015A&A...584A..26B. doi:10.1051/0004-6361/201527058. A26.
  16. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. Vizier catalog entry

October 20, 2023
tauri, confused, with, tauri, latinized, from, tauri, quadruple, star, system, constellation, taurus, visible, naked, faint, point, light, with, combined, apparent, visual, magnitude, distance, this, system, approximately, about, light, years, based, parallax,. Not to be confused with T Tauri Tau Tauri Latinized from t Tauri is a quadruple star system 5 in the constellation Taurus It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4 33 14 The distance to this system is approximately about 400 light years based on parallax 1 The system is moving further from the Earth with a heliocentric radial velocity of 14 6 km s 7 and it is a member of the Taurion OB association located between Orion and Taurus 15 It is located 0 7 degree north of the ecliptic and thus is subject to lunar occultations 4 Tau TauriLocation of t Tauri circled Observation dataEpoch J2000 Equinox J2000Constellation TaurusRight ascension 04h 42m 14 70161s 1 Declination 22 57 24 9214 1 Apparent magnitude V 4 27 2 CharacteristicsSpectral type B3V 3 A0V A2V 4 A1V 5 U B color index 0 57 6 B V color index 0 14 6 AstrometryRadial velocity Rv 14 60 7 km sProper motion m RA 2 89 1 mas yr Dec 21 86 1 mas yrParallax p 8 19 0 88 mas 1 Distanceapprox 400 ly approx 120 pc Absolute magnitude MV 1 15 2 Orbit 8 PrimaryAaPeriod P 2 956549 0 000002 dSemi major axis a 0 01455 AUEccentricity e 0 051 0 019Periastron epoch T 2 436 424 207 0 009 JDArgument of periastron w secondary 126 7 21 8 Semi amplitude K1 primary 53 6 1 0 km sDetailsAaMass6 4 9 M Luminosity1 472 10 L Surface gravity log g 2 60 11 cgsTemperature18 700 10 KMetallicity Fe H 0 51 11 dexRotational velocity v sin i 115 12 km sOther designationst Tau 94 Tauri BD 22 739 FK5 174 GC 5716 HD 29763 HIP 21881 HR 1497 SAO 76721 CCDM J04422 2257AB WDS J04422 2257A GSC 01830 02129 13 Database referencesSIMBADdataThe blue white hued primary component Aa is a B type main sequence star with a stellar classification of B3V 3 It was found to be a close spectroscopic binary in 1903 by American astronomers Edwin B Frost and Walter S Adams The pair have an orbital period of 2 96 days and eccentricity of 0 05 8 A second companion white hued component Ab has magnitude 6 97 and angular separation 0 2 from the primary in a 58 year orbit 16 5 This is a probably A type main sequence star with a class of A0V A2V 4 The more distant component B is a type A1V star with magnitude 7 2 and separation 62 8 5 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 amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 Vizier catalog entry 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 Vizier catalog entry a b Hoffleit D Warren W H 1995 VizieR Online Data Catalog Bright Star Catalogue 5th Revised Ed Hoffleit 1991 VizieR On line Data Catalog V 50 Originally Published in 1964BS C 0H 5050 Bibcode 1995yCat 5050 0H a b c Richichi A et al June 1994 New binary stars discovered by lunar occultations Astronomy and Astrophysics 286 829 837 Bibcode 1994A amp A 286 829R a b c d Eggleton P P Tokovinin A A 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 Vizier catalog entry a b Mallama A 2014 Sloan Magnitudes for the Brightest Stars The Journal of the American Association of Variable Star Observers 42 2 443 Bibcode 2014JAVSO 42 443M Vizier catalog entry a b Wilson R E 1953 General Catalogue of Stellar Radial Velocities Carnegie Institute Washington D C Publication Carnegie Institution for Science Bibcode 1953GCRV C 0W ISBN 9780598216885 LCCN 54001336 a b Petrie R M Ebbighausen E G 1961 The spectroscopic binary Boss 1107 Publications of the Dominion Astrophysical Observatory Victoria 11 385 394 Bibcode 1961PDAO 11 385P Tetzlaff N Neuhauser R Hohle M M 2011 A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun Monthly Notices of the Royal Astronomical Society 410 1 190 200 arXiv 1007 4883 Bibcode 2011MNRAS 410 190T doi 10 1111 j 1365 2966 2010 17434 x S2CID 118629873 Vizier catalog entry a b Hohle M M Neuhauser R Schutz B F 2010 Masses and luminosities of O and B type stars and red supergiants Astronomische Nachrichten 331 4 349 arXiv 1003 2335 Bibcode 2010AN 331 349H doi 10 1002 asna 200911355 S2CID 111387483 Vizier catalog entry a b Wu Yue Singh H P Prugniel P Gupta R Koleva M 2010 Coude feed stellar spectral library atmospheric parameters Astronomy amp Astrophysics 525 A71 arXiv 1009 1491 Bibcode 2011A amp A 525A 71W doi 10 1051 0004 6361 201015014 S2CID 53480665 Abt Helmut A Levato Hugo Grosso Monica 2002 Rotational Velocities of B Stars The Astrophysical Journal 573 1 359 365 Bibcode 2002ApJ 573 359A doi 10 1086 340590 tau Tau SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2016 10 18 a href Template Cite web html title Template Cite web cite web a CS1 maint postscript link Mason Brian D Wycoff Gary L Hartkopf William I Douglass Geoffrey G Worley Charles E 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 Bibcode 2001AJ 122 3466M doi 10 1086 323920 Vizier catalog entry Bouy H Alves J December 2015 Cosmography of OB stars in the solar neighbourhood Astronomy amp Astrophysics 584 13 Bibcode 2015A amp A 584A 26B doi 10 1051 0004 6361 201527058 A26 Malkov O Yu Tamazian V S Docobo J A Chulkov D A 2012 Dynamical masses of a selected sample of orbital binaries Astronomy amp Astrophysics 546 A69 Bibcode 2012A amp A 546A 69M doi 10 1051 0004 6361 201219774 Vizier catalog entry Retrieved from https en wikipedia org w index php title Tau Tauri amp oldid 1165394836, wikipedia, wiki, book, books, library,

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