Kappa Tauri (κ Tau, κ Tauri) is a double star in the constellationTaurus, the two components κ1 Tauri and κ2 Tauri both members of the Hyadesopen cluster. The pair are approximately 150 light years from Earth and are separated from each other by about six light years.
Between the two bright stars is a binary star made up of two 9th magnitude stars, Kappa Tauri C and Kappa Tauri D, which are 5.5 arcseconds from each other (as of 2013) and 175.1 arcseconds from κ1 Tau. Two more 12th magnitude companions fill out the visual group: Kappa Tauri E, which is 145 arcseconds from κ1 Tau, and Kappa Tauri F, 108.5 arcseconds away from κ2 Tau.[12]
The bright pair are both members of the Hyades star cluster, while the fainter stars are all much more distant background stars.[13]
Test of General Relativityedit
One of the 1919 eclipse negatives, with κ1 and κ2 Tauri marked near the centre of the image
With φ, υ and χ, it composed the Arabic were the Arabs' Al Kalbain, the Two Dogs.[15] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Kalbain were the title for five stars : φ as Alkalbain I, χ as Alkalbain II, these stars (κ2 and κ1) are Alkalbain III and Alkalbain IV, and υ as Alkalbain V.[16]
In Chinese, 天街 (Tiān Jiē), meaning Celestial Street, refers to an asterism consisting of κ1 Tauri and ω Tauri. Consequently, κ1 Tauri itself is known as 天街一 (Tiān Jiē yī, English: the First Star Star of Celestial Street.).[17]
Referencesedit
^ abcdefghijvan 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.
^ abcdefghMermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
^Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
^Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
^ abEggen, Olin J. (July 1998), "The Age Range of Hyades Stars", The Astronomical Journal, 116 (1): 284–292, Bibcode:1998AJ....116..284E, doi:10.1086/300413.
^Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten, 328 (9): 889–896, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776, S2CID 119323941.
^ abcRhee, Joseph H.; et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal, 660 (2): 1556–1571, arXiv:astro-ph/0609555, Bibcode:2007ApJ...660.1556R, doi:10.1086/509912, S2CID 11879505.
^ abcMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
^ abRoyer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
^Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-11-08
^Horan, S. (November 1979), "A photometric survey of the Hyades for Delta Scuti variables", Astronomical Journal, 84: 1770–1774, Bibcode:1979AJ.....84.1770H, doi:10.1086/112607
^Dyson, F.W.; Eddington, A.S.; Davidson, C.R. (1920). "A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made at the Solar eclipse of May 29, 1919". Phil. Trans. Roy. Soc. A. 220 (571–581): 291–333. Bibcode:1920RSPTA.220..291D. doi:10.1098/rsta.1920.0009.
^Allen, Richard Hinckley (1899), Star-Names and Their Meanings, New York: G. E. Stechert, p. 413
^Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars(PDF), Jet Propulsion Laboratory, California Institute of Technology.
^(in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 23 日
May 03, 2024
kappa, tauri, tauri, double, star, constellation, taurus, components, tauri, tauri, both, members, hyades, open, cluster, pair, approximately, light, years, from, earth, separated, from, each, other, about, light, years, observation, dataepoch, j2000, equinox,. Kappa Tauri k Tau k Tauri is a double star in the constellation Taurus the two components k1 Tauri and k2 Tauri both members of the Hyades open cluster The pair are approximately 150 light years from Earth and are separated from each other by about six light years Kappa Tauri Observation dataEpoch J2000 0 Equinox Constellation Taurus k1 Tau Right ascension 04h 25m 22 16505s 1 Declination 22 17 37 9375 1 Apparent magnitude V 4 22 2 k2 Tau Right ascension 04h 25m 25 01518s 1 Declination 22 11 59 9876 1 Apparent magnitude V 5 24 2 Characteristics k1 Tau Spectral type A7IV V 3 U B color index 0 12 2 B V color index 0 14 2 k2 Tau Spectral type A7V U B color index 0 09 2 B V color index 0 17 2 Astrometryk1 TauRadial velocity Rv 37 30 4 km sProper motion m RA 105 10 1 mas yr Dec 45 04 1 mas yrParallax p 21 19 0 21 mas 1 Distance154 2 ly 47 2 0 5 pc Absolute magnitude MV 0 96 5 k2 TauRadial velocity Rv 32 00 6 km sProper motion m RA 111 97 1 mas yr Dec 47 71 1 mas yrParallax p 22 03 0 35 mas 1 Distance148 2 ly 45 4 0 7 pc Absolute magnitude MV 2 18 5 Detailsk1 TauRadius2 60 7 R Luminosity33 6 8 L Temperature9 000 7 KRotational velocity v sin i 94 9 km sk2 TauLuminosity11 8 8 L Temperature7 400 8 KRotational velocity v sin i 191 9 km s Other designationsk Tau ADS 3201k1 Tau 65 Tauri BD 21 642 HD 27934 HIP 20635 HR 1387 SAO 76601 10 k2 Tau 67 Tauri BD 21 643 HD 27946 HIP 20641 HR 1388 SAO 76602 11 Database referencesSIMBADk1 Tauk2 Tau Contents 1 System 2 Test of General Relativity 3 Naming 4 ReferencesSystem edit nbsp Pleiades and Hyades with k Tauri as the very close pair at lower centre north is approximately to the left The system is dominated by a visual double star k1 Tauri and k2 Tauri k1 Tauri is a white A type subgiant with an apparent magnitude of 4 22 2 It is emitting an excess of infrared radiation at a temperature indicating there is a circumstellar disk in orbit at a radius of 67 AU from the star 7 k2 Tauri is a white A type main sequence star with an apparent magnitude of 5 24 2 Between the two bright stars is a binary star made up of two 9th magnitude stars Kappa Tauri C and Kappa Tauri D which are 5 5 arcseconds from each other as of 2013 and 175 1 arcseconds from k1 Tau Two more 12th magnitude companions fill out the visual group Kappa Tauri E which is 145 arcseconds from k1 Tau and Kappa Tauri F 108 5 arcseconds away from k2 Tau 12 The bright pair are both members of the Hyades star cluster while the fainter stars are all much more distant background stars 13 Test of General Relativity edit nbsp One of the 1919 eclipse negatives with k1 and k2 Tauri marked near the centre of the image Kappa Tauri was photographed during the solar eclipse of May 29 1919 by the expedition of Arthur Eddington in Principe and others in Sobral Brazil that confirmed Albert Einstein s prediction of the bending of light around the Sun from his general theory of relativity which he published in 1915 14 Naming editWith f y and x it composed the Arabic were the Arabs Al Kalbain the Two Dogs 15 According to the catalogue of stars in the Technical Memorandum 33 507 A Reduced Star Catalog Containing 537 Named Stars Al Kalbain were the title for five stars f as Alkalbain I x as Alkalbain II these stars k2 and k1 are Alkalbain III and Alkalbain IV and y as Alkalbain V 16 In Chinese 天街 Tian Jie meaning Celestial Street refers to an asterism consisting of k1 Tauri and w Tauri Consequently k1 Tauri itself is known as 天街一 Tian Jie yi English the First Star Star of Celestial Street 17 References edit a b c d e f g h i j 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 a b c d e f g h Mermilliod J C 1986 Compilation of Eggen s UBV data transformed to UBV unpublished Catalogue of Eggen s UBV Data SIMBAD Bibcode 1986EgUBV 0M Cowley A et al April 1969 A study of the bright A stars I A catalogue of spectral classifications Astronomical Journal 74 375 406 Bibcode 1969AJ 74 375C doi 10 1086 110819 Gontcharov G A November 2006 Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system Astronomy Letters 32 11 759 771 arXiv 1606 08053 Bibcode 2006AstL 32 759G doi 10 1134 S1063773706110065 S2CID 119231169 a b Eggen Olin J July 1998 The Age Range of Hyades Stars The Astronomical Journal 116 1 284 292 Bibcode 1998AJ 116 284E doi 10 1086 300413 Kharchenko N V et al 2007 Astrophysical supplements to the ASCC 2 5 Ia Radial velocities of 55000 stars and mean radial velocities of 516 Galactic open clusters and associations Astronomische Nachrichten 328 9 889 896 arXiv 0705 0878 Bibcode 2007AN 328 889K doi 10 1002 asna 200710776 S2CID 119323941 a b c Rhee Joseph H et al May 2007 Characterization of Dusty Debris Disks The IRAS and Hipparcos Catalogs The Astrophysical Journal 660 2 1556 1571 arXiv astro ph 0609555 Bibcode 2007ApJ 660 1556R doi 10 1086 509912 S2CID 11879505 a b c McDonald I et al 2012 Fundamental Parameters and Infrared Excesses of Hipparcos Stars Monthly Notices of the Royal Astronomical Society 427 1 343 57 arXiv 1208 2037 Bibcode 2012MNRAS 427 343M doi 10 1111 j 1365 2966 2012 21873 x S2CID 118665352 a b Royer F et al February 2007 Rotational velocities of A type stars III Velocity distributions Astronomy and Astrophysics 463 2 671 682 arXiv astro ph 0610785 Bibcode 2007A amp A 463 671R doi 10 1051 0004 6361 20065224 S2CID 18475298 kap01 Tau SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2015 11 05 kap02 Tau SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2015 11 05 Mason B D et al 2014 The Washington Visual Double Star Catalog The Astronomical Journal 122 6 3466 3471 Bibcode 2001AJ 122 3466M doi 10 1086 323920 retrieved 2015 11 08 Horan S November 1979 A photometric survey of the Hyades for Delta Scuti variables Astronomical Journal 84 1770 1774 Bibcode 1979AJ 84 1770H doi 10 1086 112607 Dyson F W Eddington A S Davidson C R 1920 A Determination of the Deflection of Light by the Sun s Gravitational Field from Observations Made at the Solar eclipse of May 29 1919 Phil Trans Roy Soc A 220 571 581 291 333 Bibcode 1920RSPTA 220 291D doi 10 1098 rsta 1920 0009 Allen Richard Hinckley 1899 Star Names and Their Meanings New York G E Stechert p 413 Rhoads Jack W November 15 1971 Technical Memorandum 33 507 A Reduced Star Catalog Containing 537 Named Stars PDF Jet Propulsion Laboratory California Institute of Technology in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 5 月 23 日 Retrieved from https en wikipedia org w index php title Kappa Tauri amp oldid 1170138923, wikipedia, wiki, book, books, library,
