This is a double-lined spectroscopic binary star system with an orbital period of 31.39 days and an eccentricity of 0.53.[6] The members are separated by a distance of less than 5 AU.[13] The primary component has a stellar classification of A5IV, indicating that it has evolved away from the main sequence and is now a subgiant star. However, the classification is uncertain and not consistent with the mass derived from the orbit.[7] It is among the least variable of the stars that were observed by the Hipparcos spacecraft, with a magnitude varying by only 0.0005.[14]
Based on observations using the Spitzer Space Telescope, as reported in 2005, this system is emitting an excess of infrared radiation. This emission can be explained by a circumbinary ring of dust. The dust is emitting infrared radiation at a blackbody temperature of 100 K.[13] It is thought to extend from 50 to 400 AU away from the stars.[7]
Naming
In combination with Alpha Trianguli, these stars were called Al Mīzān, which is Arabic for "The Scale Beam".[12]
^ abcdefvan 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.
^ abcdJohnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
^ abcGray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.
^ abPourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics, 424: 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
^ abcdKennedy, G. M.; Wyatt, M. C.; Sibthorpe, B.; Phillips, N. M.; Matthews, B.; Greaves, J. S. (2012). "Coplanar Circumbinary Debris Disks". Monthly Notices of the Royal Astronomical Society. 426 (3): 2115–28. arXiv:1208.1759. Bibcode:2012MNRAS.426.2115K. doi:10.1111/j.1365-2966.2012.21865.x. S2CID 59408005.
^Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393 (3): 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763
^Booth, M.; Kennedy, G.; Sibthorpe, B.; Matthews, B. C.; Wyatt, M. C.; Duchene, G.; Kavelaars, J. J.; Rodriguez, D.; Greaves, J. S.; Koning, A.; Vican, L.; Rieke, G. H.; Su, K. Y. L.; Moro-Martin, A.; Kalas, P. (2013). "Resolved debris discs around a stars in the Herschel DEBRIS survey". Monthly Notices of the Royal Astronomical Society. 428 (2): 1263. arXiv:1210.0547. Bibcode:2013MNRAS.428.1263B. doi:10.1093/mnras/sts117.
^Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
^ abStansberry, J. A.; et al. (2005). "A Spitzer Survey for Debris Disks in Binary Star Systems". Protostars and Planets V, Proceedings of the Conference held October 24-28, 2005, in Hilton Waikoloa Village, Hawai'i. Protostars and Planets V. p. 8613. Bibcode:2005prpl.conf.8613S.
^Adelman, S. J. (February 2001), "Research Note Hipparcos photometry: The least variable stars", Astronomy and Astrophysics, 367: 297–298, Bibcode:2001A&A...367..297A, doi:10.1051/0004-6361:20000567
^(in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 10 日
January 13, 2023
beta, trianguli, confused, with, australis, beta, trianguli, bayer, designation, binary, star, system, constellation, triangulum, located, about, light, years, from, earth, although, apparent, magnitude, only, brightest, star, constellation, triangulum, triang. Not to be confused with Beta Trianguli Australis Beta Trianguli Beta Tri b Trianguli b Tri is the Bayer designation for a binary star 11 system in the constellation Triangulum located about 127 light years from Earth 1 Although the apparent magnitude is only 3 0 2 it is the brightest star in the constellation Triangulum 12 b TrianguliLocation of b Trianguli circled Observation dataEpoch J2000 0 Equinox J2000 0Constellation TriangulumRight ascension 02h 09m 32 62712s 1 Declination 34 59 14 2694 1 Apparent magnitude V 3 00 2 CharacteristicsSpectral type A5IV 3 U B color index 0 11 2 B V color index 0 14 2 AstrometryRadial velocity Rv 9 9 4 km sProper motion m RA 149 16 1 mas yr Dec 39 10 1 mas yrParallax p 25 71 0 34 mas 1 Distance127 2 ly 38 9 0 5 pc Absolute magnitude MV 0 05 5 Orbit 6 Period P 31 3884 dEccentricity e 0 53Periastron epoch T 2432004 255 JDArgument of periastron w secondary 318 4 Semi amplitude K1 primary 33 3 km sSemi amplitude K2 secondary 69 2 km sDetailsMass3 5 7 M Luminosity74 combined 7 L Surface gravity log g 3 70 3 cgsTemperature8 186 3 KRotational velocity v sin i 70 8 km sAge0 73 9 GyrOther designationsb Trianguli b Tri Beta Tri 4 Trianguli HR 622 HD 13161 BD 34 381 FK5 75 HIP 10064 SAO 55306 10 Database referencesSIMBADdataThis is a double lined spectroscopic binary star system with an orbital period of 31 39 days and an eccentricity of 0 53 6 The members are separated by a distance of less than 5 AU 13 The primary component has a stellar classification of A5IV indicating that it has evolved away from the main sequence and is now a subgiant star However the classification is uncertain and not consistent with the mass derived from the orbit 7 It is among the least variable of the stars that were observed by the Hipparcos spacecraft with a magnitude varying by only 0 0005 14 Based on observations using the Spitzer Space Telescope as reported in 2005 this system is emitting an excess of infrared radiation This emission can be explained by a circumbinary ring of dust The dust is emitting infrared radiation at a blackbody temperature of 100 K 13 It is thought to extend from 50 to 400 AU away from the stars 7 Naming EditIn combination with Alpha Trianguli these stars were called Al Mizan which is Arabic for The Scale Beam 12 In Chinese 天大將軍 Tian Da Jiang Jun meaning Heaven s Great General refers to an asterism consisting of b Trianguli g Andromedae f Persei 51 Andromedae 49 Andromedae x Andromedae y Andromedae t Andromedae 56 Andromedae g Trianguli and d Trianguli Consequently the Chinese name for b Trianguli itself is 天大將軍九 Tian Da Jiang Jun jiǔ English the Ninth Star of Heaven s Great General 15 References Edit a b c d e f 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 c d Johnson H L et al 1966 UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 99 Bibcode 1966CoLPL 4 99J a b c Gray R O Corbally C J Garrison R F McFadden M T Robinson P E 2003 Contributions to the Nearby Stars NStars Project Spectroscopy of Stars Earlier than M0 within 40 Parsecs The Northern Sample I The Astronomical Journal 126 4 2048 arXiv astro ph 0308182 Bibcode 2003AJ 126 2048G doi 10 1086 378365 S2CID 119417105 Wilson Ralph Elmer 1953 General catalogue of stellar radial velocities Washington Carnegie Institution of Washington Bibcode 1953GCRV C 0W 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 Pourbaix D et al 2004 SB9 The Ninth Catalogue of Spectroscopic Binary Orbits Astronomy amp Astrophysics 424 727 732 arXiv astro ph 0406573 Bibcode 2004A amp A 424 727P doi 10 1051 0004 6361 20041213 S2CID 119387088 a b c d Kennedy G M Wyatt M C Sibthorpe B Phillips N M Matthews B Greaves J S 2012 Coplanar Circumbinary Debris Disks Monthly Notices of the Royal Astronomical Society 426 3 2115 28 arXiv 1208 1759 Bibcode 2012MNRAS 426 2115K doi 10 1111 j 1365 2966 2012 21865 x S2CID 59408005 Royer F et al October 2002 Rotational velocities of A type stars in the northern hemisphere II Measurement of v sin i Astronomy and Astrophysics 393 3 897 911 arXiv astro ph 0205255 Bibcode 2002A amp A 393 897R doi 10 1051 0004 6361 20020943 S2CID 14070763 Booth M Kennedy G Sibthorpe B Matthews B C Wyatt M C Duchene G Kavelaars J J Rodriguez D Greaves J S Koning A Vican L Rieke G H Su K Y L Moro Martin A Kalas P 2013 Resolved debris discs around a stars in the Herschel DEBRIS survey Monthly Notices of the Royal Astronomical Society 428 2 1263 arXiv 1210 0547 Bibcode 2013MNRAS 428 1263B doi 10 1093 mnras sts117 bet Tri Spectroscopic binary SIMBAD Centre de Donnees astronomiques de Strasbourg retrieved 2011 12 12 Eggleton P P Tokovinin A A September 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 879 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 a b Garfinkle Robert A 1997 Star Hopping Your Visa to Viewing the Universe Cambridge University Press p 238 ISBN 0 521 59889 3 a b Stansberry J A et al 2005 A Spitzer Survey for Debris Disks in Binary Star Systems Protostars and Planets V Proceedings of the Conference held October 24 28 2005 in Hilton Waikoloa Village Hawai i Protostars and Planets V p 8613 Bibcode 2005prpl conf 8613S Adelman S J February 2001 Research Note Hipparcos photometry The least variable stars Astronomy and Astrophysics 367 297 298 Bibcode 2001A amp A 367 297A doi 10 1051 0004 6361 20000567 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 7 月 10 日 Retrieved from https en wikipedia org w index php title Beta Trianguli amp oldid 1079511664, wikipedia, wiki, book, books, library,
