θ Tauri is composed of two 3rd magnitude stars, designated Theta1 Tauri (Theta Tauri B) and Theta2 Tauri (Theta Tauri A). Theta² is brighter, hence the pair are sometimes referred to as Theta Tauri B and A, respectively. They are separated by 5.62 arcminutes (0.094°) on the sky. Based upon parallax measurements, Theta¹ Tauri is located at a distance of 152 ly (47 pc), while Theta² Tauri is at a distance of 157 light-years (48 parsecs). θ Tauri A and B are both spectroscopic binaries; the four components are designated Theta Tauri Aa (formally named Chamukuy/ˈtʃɑːmuːkuːi/), Ab, Ba, and Bb.
The θ Tauri pair, showing contrasting blue and yellow colors, in the Hyades cluster. In this image, θ1 Tauri is above in yellow, and θ2 Tauri is below in light blue.
θ Tauri (Latinised to Theta Tauri) is the double star's Bayer designation;[citation needed] θ1 Tauri and θ2 Tauri those of its two constituents. The designations of the two constituents as Theta Tauri A and B, and those of the four components - Theta Tauri Aa, Ab, Ba and Bb - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[12]
In the mythology of the Maya peoples, Theta Tauri is known as Chamukuy, meaning a small bird in the Yucatec Maya language.[13] In 2016, the IAU organized a Working Group on Star Names (WGSN)[14] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[15] It approved the name Chamukuy for the component Theta Tauri Aa on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[16]
Theta Tauri A has a mean apparent magnitude of +3.40. It is classified as a Delta Scuti typevariable star and its brightness varies from magnitude +3.35 to +3.42 with a period of 1.82 hours.[20] Its primary component, Theta Tauri Aa, is a white A-typegiant. The secondary, Theta Tauri Ab, is of the 6th magnitude and is 0.005 arcseconds, or at least 2 AU, distant. It completes an orbit once every 141 days.
Theta Tauri B is the dimmer constituent. Its primary component, Theta Tauri Ba, is an orange K-typegiant with an apparent magnitude of +3.84. The secondary, Theta Tauri Bb, is of the 7th-magnitude. It has a mass of 1.31 M☉ and orbits the primary every 16.26 years on a fairly eccentric (at 0.570) orbit.[21]
References
^ abcdvan Leeuwen, F. (November 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.
^ abSamus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
^Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
^Morgan, W. W.; Abt, Helmut A.; Tapscott, J. W. (1978). Revised MK Spectral Atlas for stars earlier than the sun. Bibcode:1978rmsa.book.....M.
^Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^Böhm-Vitense, Erika; et al. (December 2000). "Ultraviolet Emission Lines in BA and Non-BA Giants". The Astrophysical Journal. 545 (2): 992–999. Bibcode:2000ApJ...545..992B. doi:10.1086/317850.
^Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ abcdefghTorres, K. B. V.; Lampens, P.; Frémat, Y.; Hensberge, H.; Lebreton, Y.; Škoda, P.; Guenther, E.; Schwope, A.; Heber, U. (2011). "Spectra disentangling applied to the Hyades binary θ2 Tauri AB: New orbit, orbital parallax and component properties". Astronomy and Astrophysics. 525: A50. arXiv:1010.5643. Bibcode:2011A&A...525A..50T. doi:10.1051/0004-6361/201015166. S2CID 55408682.
^Mermilliod, J. -C; Andersen, J.; Latham, D. W.; Mayor, M. (2007). "Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries". Astronomy and Astrophysics. 473 (3): 829. Bibcode:2007A&A...473..829M. doi:10.1051/0004-6361:20078007.
^ abcdefLiakos, Alexios; Niarchos, Panagiotis (2017). "Catalogue and properties of δ Scuti stars in binaries". Monthly Notices of the Royal Astronomical Society. 465 (1): 1181. arXiv:1611.00200. Bibcode:2017MNRAS.465.1181L. doi:10.1093/mnras/stw2756.
^ abcdefghJofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; de la Villarmois, E. Artur; Chavero, C.; Gómez, M.; Mauas, P. J. D.; Heber, U. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy and Astrophysics. 574: A50. arXiv:1410.6422. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474. S2CID 53666931.
^Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets". arXiv:1012.0707 [astro-ph.SR].
^Susan Milbrath (1 January 2010). Star Gods of the Maya: Astronomy in Art, Folklore, and Calendars. University of Texas Press. ISBN978-0-292-77851-1.
^"IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
^"WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.
^"Naming Stars". IAU.org. Retrieved 16 December 2017.
^(in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 2008-10-25 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
^"MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^Solano, E.; Fernley, J. (April 1997). "Spectroscopic survey of delta Scuti stars. I. Rotation velocities and effective temperatures". Astronomy & Astrophysics Supplement Series. 122: 131–147. Bibcode:1997A&AS..122..131S. doi:10.1051/aas:1997329.
^Torres, Guillermo; Stefanik, Robert P.; Latham, David W. (1997). "The Hyades Binaries θ1 Tauri and θ2Tauri: The Distance to the Cluster and the Mass‐Luminosity Relation". The Astrophysical Journal. 485 (1): 167. Bibcode:1997ApJ...485..167T. doi:10.1086/304422.
External links
Observing Naked-eye Stars
June 02, 2023
theta, tauri, tauri, abbreviated, theta, wide, double, star, constellation, taurus, member, hyades, open, cluster, taurihyades, showing, tauriobservation, dataepoch, j2000, equinox, j2000, 0constellation, taurusθ1, tauriright, ascension, 49603s, declination, 8. Theta Tauri 8 Tauri abbreviated Theta Tau 8 Tau is a wide double star in the constellation of Taurus and a member of the Hyades open cluster 8 TauriHyades showing 8 TauriObservation dataEpoch J2000 0 Equinox J2000 0Constellation Taurus81 TauriRight ascension 04h 28m 34 49603s 1 Declination 15 57 43 8494 1 Apparent magnitude V 3 8482 TauriRight ascension 04h 28m 39 74070s 1 Declination 15 52 15 1745 1 Apparent magnitude V 3 35 3 42 2 Characteristics81 TauriSpectral type G9 III Fe 0 5 3 82 TauriSpectral type A7 III 4 Variable type d Scuti 2 Astrometry81 TauriParallax p 21 4183 0 3731 mas 5 Distance152 3 ly 46 7 0 8 pc Absolute magnitude MV 0 416 6 82 TauriParallax p 20 8354 0 3731 mas 7 Distance157 3 ly 48 0 0 9 pc Absolute magnitude MV 0 30 1 44 8 Orbit 9 PrimaryACompanionBPeriod P 5 997 daysEccentricity e 0 64Semi amplitude K1 primary 8 39 km sOrbit 8 PrimaryAaCompanionAbPeriod P 140 7302 daysSemi major axis a 18 91 Eccentricity e 0 7360Inclination i 47 8 Semi amplitude K1 primary 32 95 km sSemi amplitude K2 secondary 43 68 km sDetailsAaMass2 86 10 M Radius4 4 10 R Luminosity59 8 L Surface gravity log g 3 6 10 cgsTemperature7 800 10 KRotational velocity v sin i 68 4 8 km sAbMass2 16 10 M Radius2 7 10 R Luminosity21 8 L Temperature7 800 8 KRotational velocity v sin i 113 8 km sAge650 8 Myr81 TauriMass2 67 11 M Radius10 55 11 R Luminosity71 11 L Surface gravity log g 3 21 11 cgsTemperature5 080 11 KMetallicity Fe H 0 14 11 dexRotational velocity v sin i 1 40 11 km sAge510 11 MyrOther designations8 Tauri81 Tauri 77 Tauri BD 15 631 HD 28307 HIP 20885 HR 1411 SAO 9395582 Tauri Chamukuy 78 Tauri BD 15 632 HD 28319 HIP 20894 HR 1412 SAO 93957Database referencesSIMBAD81 Tauri82 Tauri8 Tauri is composed of two 3rd magnitude stars designated Theta1 Tauri Theta Tauri B and Theta2 Tauri Theta Tauri A Theta is brighter hence the pair are sometimes referred to as Theta Tauri B and A respectively They are separated by 5 62 arcminutes 0 094 on the sky Based upon parallax measurements Theta Tauri is located at a distance of 152 ly 47 pc while Theta Tauri is at a distance of 157 light years 48 parsecs 8 Tauri A and B are both spectroscopic binaries the four components are designated Theta Tauri Aa formally named Chamukuy ˈ tʃ ɑː m uː k uː i Ab Ba and Bb Contents 1 Nomenclature 2 Properties 3 References 4 External linksNomenclature Edit The 8 Tauri pair showing contrasting blue and yellow colors in the Hyades cluster In this image 81 Tauri is above in yellow and 82 Tauri is below in light blue 8 Tauri Latinised to Theta Tauri is the double star s Bayer designation citation needed 81 Tauri and 82 Tauri those of its two constituents The designations of the two constituents as Theta Tauri A and B and those of the four components Theta Tauri Aa Ab Ba and Bb derive from the convention used by the Washington Multiplicity Catalog WMC for multiple star systems and adopted by the International Astronomical Union IAU 12 In the mythology of the Maya peoples Theta Tauri is known as Chamukuy meaning a small bird in the Yucatec Maya language 13 In 2016 the IAU organized a Working Group on Star Names WGSN 14 to catalog and standardize proper names for stars The WGSN decided to attribute proper names to individual stars rather than entire multiple systems 15 It approved the name Chamukuy for the component Theta Tauri Aa on 5 September 2017 and it is now so included in the List of IAU approved Star Names 16 In Chinese 畢宿 Bi Xiu meaning Net refers to an asterism consisting of Theta Tauri Epsilon Tauri named Ain Delta Tauri Delta Tauri Gamma Tauri Alpha Tauri Aldebaran 71 Tauri and Lambda Tauri 17 Consequently the Chinese name for Theta Tauri itself is 畢宿六 Bi Xiu liu the Sixth Star of Net 18 Properties Edit A light curve for Theta2 Tauri plotted from TESS data 19 Theta Tauri A has a mean apparent magnitude of 3 40 It is classified as a Delta Scuti type variable star and its brightness varies from magnitude 3 35 to 3 42 with a period of 1 82 hours 20 Its primary component Theta Tauri Aa is a white A type giant The secondary Theta Tauri Ab is of the 6th magnitude and is 0 005 arcseconds or at least 2 AU distant It completes an orbit once every 141 days Theta Tauri B is the dimmer constituent Its primary component Theta Tauri Ba is an orange K type giant with an apparent magnitude of 3 84 The secondary Theta Tauri Bb is of the 7th magnitude It has a mass of 1 31 M and orbits the primary every 16 26 years on a fairly eccentric at 0 570 orbit 21 References Edit a b c d van Leeuwen F November 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 a b Samus N N Durlevich O V et al 2009 VizieR Online Data Catalog General Catalogue of Variable Stars Samus 2007 2013 VizieR On line Data Catalog B GCVS Originally Published in 2009yCat 102025S 1 B gcvs Bibcode 2009yCat 102025S Keenan Philip C McNeil Raymond C 1989 The Perkins Catalog of Revised MK Types for the Cooler Stars The Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 Morgan W W Abt Helmut A Tapscott J W 1978 Revised MK Spectral Atlas for stars earlier than the sun Bibcode 1978rmsa book M Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR Bohm Vitense Erika et al December 2000 Ultraviolet Emission Lines in BA and Non BA Giants The Astrophysical Journal 545 2 992 999 Bibcode 2000ApJ 545 992B doi 10 1086 317850 Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR a b c d e f g h Torres K B V Lampens P Fremat Y Hensberge H Lebreton Y Skoda P Guenther E Schwope A Heber U 2011 Spectra disentangling applied to the Hyades binary 82 Tauri AB New orbit orbital parallax and component properties Astronomy and Astrophysics 525 A50 arXiv 1010 5643 Bibcode 2011A amp A 525A 50T doi 10 1051 0004 6361 201015166 S2CID 55408682 Mermilliod J C Andersen J Latham D W Mayor M 2007 Red giants in open clusters XIII Orbital elements of 156 spectroscopic binaries Astronomy and Astrophysics 473 3 829 Bibcode 2007A amp A 473 829M doi 10 1051 0004 6361 20078007 a b c d e f Liakos Alexios Niarchos Panagiotis 2017 Catalogue and properties of d Scuti stars in binaries Monthly Notices of the Royal Astronomical Society 465 1 1181 arXiv 1611 00200 Bibcode 2017MNRAS 465 1181L doi 10 1093 mnras stw2756 a b c d e f g h Jofre E Petrucci R Saffe C Saker L de la Villarmois E Artur Chavero C Gomez M Mauas P J D Heber U 2015 Stellar parameters and chemical abundances of 223 evolved stars with and without planets Astronomy and Astrophysics 574 A50 arXiv 1410 6422 Bibcode 2015A amp A 574A 50J doi 10 1051 0004 6361 201424474 S2CID 53666931 Hessman F V Dhillon V S Winget D E Schreiber M R Horne K Marsh T R Guenther E Schwope A Heber U 2010 On the naming convention used for multiple star systems and extrasolar planets arXiv 1012 0707 astro ph SR Susan Milbrath 1 January 2010 Star Gods of the Maya Astronomy in Art Folklore and Calendars University of Texas Press ISBN 978 0 292 77851 1 IAU Working Group on Star Names WGSN Retrieved 22 May 2016 WG Triennial Report 2015 2018 Star Names PDF p 5 Retrieved 2018 07 14 Naming Stars IAU org Retrieved 16 December 2017 陳久金 2005 中國星座神話 五南圖書出版股份有限公司 ISBN 978 986 7332 25 7 in Chinese 香港太空館 研究資源 亮星中英對照表 Archived 2008 10 25 at the Wayback Machine Hong Kong Space Museum Accessed on line November 23 2010 MAST Barbara A Mikulski Archive for Space Telescopes Space Telescope Science Institute Retrieved 8 December 2021 Solano E Fernley J April 1997 Spectroscopic survey of delta Scuti stars I Rotation velocities and effective temperatures Astronomy amp Astrophysics Supplement Series 122 131 147 Bibcode 1997A amp AS 122 131S doi 10 1051 aas 1997329 Torres Guillermo Stefanik Robert P Latham David W 1997 The Hyades Binaries 81 Tauri and 82Tauri The Distance to the Cluster and the Mass Luminosity Relation The Astrophysical Journal 485 1 167 Bibcode 1997ApJ 485 167T doi 10 1086 304422 External links EditObserving Naked eye Stars Retrieved from https en wikipedia org w index php title Theta Tauri amp oldid 1134235911, wikipedia, wiki, book, books, library,
