Location of 36 Ophiuchi in the constellation Ophiuchus
The primary and secondary stars (also known as HD 155886) are nearly identical orange main-sequence dwarfs of spectral type K2/K1. This binary is unusual because its eruptions do not seem to conform to the Waldmeier effect; that is, the strongest eruptions of HD 155886 are not the ones characterized by the fast eruption onset.[10] The tertiary star is an orange main-sequence dwarf of spectral type K5.
Star C is separated from the A-B pair by 700 arcseconds, compared to a minimum of 4.6 arcseconds for A-B, so its effect on the movements of the A-B pair is small. A and B have active chromospheres. At present the distance between the stars forming the AB-pair is 5.1 arcseconds and the position angle is 139 degrees, while star C is 731.6 arcseconds away from the A-component and situated at a position angle of 74 degrees.
In the beliefs of the Kamilaroi and Euahlayi Aboriginal peoples in New South Wales, Australia, the star A is called Guniibuu that represents the robin red-breast bird (Petroica boodang). In 2016, the IAU organized a Working Group on Star Names (WGSN)[11] to catalog and standardize proper names for stars. The WGSN approved the name Guniibuu for the star A on 10 August 2018 and it is now so included in the List of IAU-approved Star Names.[12]
Hunt for substellar objectsedit
The McDonald Observatory team has set limits to the presence of one or more planets[8] around 36 Ophiuchi A with masses between 0.13 and 5.4 Jupiter masses and average separations spanning between 0.05 and 5.2 astronomical units (AU), although beyond 1.5 AU orbits are inherently unstable around either 36 Ophiuchi A or 36 Ophiuchi B.[13]
The star C (or namely HD 156026) is among five nearby paradigms as K-type stars of a type in a 'sweet spot’ between Sun-analog stars and M stars for the likelihood of evolved life, per analysis of Giada Arney from NASA's Goddard Space Flight Center.[14]
In cultureedit
A fictional planet called Giedi Prime around 36 Ophiuchi B is in the science-fiction novel Dune the homeworld of the House of Harkonnen.
Notesedit
^ abFrom L=4πR2σTeff4, where L is the luminosity, R is the radius, Teff is the effective surface temperature and σ is the Stefan–Boltzmann constant.
^ abcBrown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ abcBrown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ abcdBrown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ abcDemory, Brice-Olivier; Ségransan, Damien; Forveille, Thierry; Queloz, Didier; Beuzit, Jean-Luc; Delfosse, Xavier; Di Folco, Emmanuel; Kervella, Pierre; Le Bouquin, Jean-Baptiste; Perrier, Christian; Benisty, Myriam; Duvert, Gilles; Hofmann, Karl-Heinz; Lopez, Bruno; Petrov, Romain (October 2009). "Mass-radius relation of low and very low-mass stars revisited with the VLTI". Astronomy and Astrophysics. 505 (1): 205–215. arXiv:0906.0602. Bibcode:2009A&A...505..205D. doi:10.1051/0004-6361/200911976. S2CID 14786643.
^ abTaylor, B. J. (December 2005), "Statistical Cataloging of Archival Data for Luminosity Class IV-V Stars. III. The Epoch 2004 [Fe/H] and Temperature Catalogs", The Astrophysical Journal Supplement Series, 161 (2): 444–455, Bibcode:2005ApJS..161..444T, doi:10.1086/496885.Vizier catalog entry
^Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal, 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785, S2CID 27151456
^ Bill Steigerwald (2019-03-07). ""Goldilocks" Stars May Be "Just Right" for Finding Habitable Worlds". NASA. Retrieved 2020-05-12. 'I find that certain nearby K stars like 61 Cyg A/B, Epsilon Indi, Groombridge 1618, and HD 156026 may be particularly good targets for future biosignature searches,' said Arney.
Further readingedit
Irwin, Alan W.; Yang, Stephenson L. S. & Walker, Gordon A. H. (1996), "36 Ophiuchi AB: Incompatibility of the Orbit and Precise Radial Velocities", Publications of the Astronomical Society of the Pacific, 108: 580, Bibcode:1996PASP..108..580I, doi:10.1086/133768
Cayrel de Strobel, G.; Lebreton, Y.; Perrin, M.-N. & Cayrel, R. (1989), "A thorough spectroscopic study of the very nearby triple system - 36 Ophiuchi", Astronomy and Astrophysics, 225 (2): 369–380, Bibcode:1989A&A...225..369C
Wittenmeyer, R. A.; Endl, Michael; Cochran, William D.; Hatzes, Artie P.; Walker, G. A. H.; Yang, S. L. S. & Paulson, Diane B. (2006), "Detection Limits from the McDonald Observatory Planet Search Program", Astronomical Journal, 132 (1): 177–188, arXiv:astro-ph/0604171, Bibcode:2006AJ....132..177W, doi:10.1086/504942, S2CID 16755455
Barnes, Sydney A. (2007), "Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors", The Astrophysical Journal, 669 (2): 1167–1189, arXiv:0704.3068, Bibcode:2007ApJ...669.1167B, doi:10.1086/519295, S2CID 14614725
External linksedit
"36 Ophiuchi". SolStation. Retrieved 3 November 2005.
ophiuchi, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, january, 2021, le. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources 36 Ophiuchi news newspapers books scholar JSTOR January 2021 Learn how and when to remove this message 36 Ophiuchi or Guniibuu for component A is a triple star system 19 5 light years from Earth It is in the constellation Ophiuchus 36 Ophiuchi A B CA visual band light curve for 36 Ophiuchi C V2215 Ophiuchi plotted from ASAS SN data 1 Observation dataEpoch J2000 Equinox J2000 Constellation Ophiuchus Right ascension A 17h 15m 20 851s B 17h 15m 20 978s C 17h 16m 13 3624s 2 Declination A 26 36 09 04 B 26 36 10 18 C 26 32 46 129 2 Apparent magnitude V 5 08 5 03 6 34 2 Characteristics Spectral type K2 V K1 V K5 V 2 U B color index 0 51 AB 1 04 B V color index 0 85 AB 1 16 Variable type C RS CVn Astrometry36 Oph ARadial velocity Rv 0 6 2 km sProper motion m RA 498 600 0 123 3 mas yr Dec 1149 158 0 086 3 mas yrParallax p 168 0031 0 1343 mas 3 Distance19 41 0 02 ly 5 952 0 005 pc 36 Oph BRadial velocity Rv 0 0 2 km sProper motion m RA 465 861 0 111 4 mas yr Dec 1141 168 0 073 4 mas yrParallax p 168 1303 0 1081 mas 4 Distance19 40 0 01 ly 5 948 0 004 pc 36 Oph CRadial velocity Rv 0 04 0 22 5 km sProper motion m RA 479 573 0 031 5 mas yr Dec 1124 332 0 020 5 mas yrParallax p 167 9617 0 0311 mas 5 Distance19 418 0 004 ly 5 954 0 001 pc OrbitCompanion36 Ophiuchi BPeriod P 568 9 yrSemi major axis a 14 7 Eccentricity e 0 922Inclination i 99 6 Longitude of the node W 83 6 Periastron epoch T 1 763 39 Details36 Oph A BMass0 85 0 85 M Radius0 817 0 016 6 0 81 R Luminosity bolometric 0 33 0 36 note 1 L Luminosity visual LV 0 28 0 30 L Temperature4 843 134 6 4 985 20 7 KMetallicityB 0 31 0 042 7 dexMetallicity Fe H A 0 20 6 dexAge0 6 1 8 8 9 Gyr36 Oph CMass0 71 M Radius0 72 R Luminosity bolometric 0 20 note 1 L Luminosity visual LV 0 09 L Temperature4 550 KMetallicity46 100 Sun Other designations36 Oph WDS J17153 2636AB GJ 663 CD 26 12026 GCTP 3908 00 HIP 84405A Guniibuu HR 6402 HD 155886 LHS 437 SAO 185198B HR 6401 HD 155885 LHS 438 SAO 185199C V2215 Ophiuchi GJ 664 CD 26 12036 HD 156026 GCTP 3913 00 LHS 439 SAO 185213 HIP 84478 Database referencesSIMBADABABCExoplanet ArchiveABCARICNSABC 36Location of 36 Ophiuchi in the constellation Ophiuchus The primary and secondary stars also known as HD 155886 are nearly identical orange main sequence dwarfs of spectral type K2 K1 This binary is unusual because its eruptions do not seem to conform to the Waldmeier effect that is the strongest eruptions of HD 155886 are not the ones characterized by the fast eruption onset 10 The tertiary star is an orange main sequence dwarf of spectral type K5 Star C is separated from the A B pair by 700 arcseconds compared to a minimum of 4 6 arcseconds for A B so its effect on the movements of the A B pair is small A and B have active chromospheres At present the distance between the stars forming the AB pair is 5 1 arcseconds and the position angle is 139 degrees while star C is 731 6 arcseconds away from the A component and situated at a position angle of 74 degrees Contents 1 Nomenclature 2 Hunt for substellar objects 3 In culture 4 Notes 5 References 6 Further reading 7 External linksNomenclature editIn the beliefs of the Kamilaroi and Euahlayi Aboriginal peoples in New South Wales Australia the star A is called Guniibuu that represents the robin red breast bird Petroica boodang In 2016 the IAU organized a Working Group on Star Names WGSN 11 to catalog and standardize proper names for stars The WGSN approved the name Guniibuu for the star A on 10 August 2018 and it is now so included in the List of IAU approved Star Names 12 Hunt for substellar objects editThe McDonald Observatory team has set limits to the presence of one or more planets 8 around 36 Ophiuchi A with masses between 0 13 and 5 4 Jupiter masses and average separations spanning between 0 05 and 5 2 astronomical units AU although beyond 1 5 AU orbits are inherently unstable around either 36 Ophiuchi A or 36 Ophiuchi B 13 The star C or namely HD 156026 is among five nearby paradigms as K type stars of a type in a sweet spot between Sun analog stars and M stars for the likelihood of evolved life per analysis of Giada Arney from NASA s Goddard Space Flight Center 14 In culture editA fictional planet called Giedi Prime around 36 Ophiuchi B is in the science fiction novel Dune the homeworld of the House of Harkonnen Notes edit a b From L 4pR2sTeff4 where L is the luminosity R is the radius Teff is the effective surface temperature and s is the Stefan Boltzmann constant References edit 1 a b ASAS SN Variable Stars Database ASAS SN Variable Stars Database ASAS SN Retrieved 6 January 2022 a b c d e f SIMBAD Astronomical Database Centre de Donnees astronomiques de Strasbourg Retrieved 2013 08 23 A LHS 437 High proper motion Star B LHS 438 High proper motion Star C V V2215 Oph Variable of RS CVn type a b c Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c d Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b c Demory Brice Olivier Segransan Damien Forveille Thierry Queloz Didier Beuzit Jean Luc Delfosse Xavier Di Folco Emmanuel Kervella Pierre Le Bouquin Jean Baptiste Perrier Christian Benisty Myriam Duvert Gilles Hofmann Karl Heinz Lopez Bruno Petrov Romain October 2009 Mass radius relation of low and very low mass stars revisited with the VLTI Astronomy and Astrophysics 505 1 205 215 arXiv 0906 0602 Bibcode 2009A amp A 505 205D doi 10 1051 0004 6361 200911976 S2CID 14786643 a b Taylor B J December 2005 Statistical Cataloging of Archival Data for Luminosity Class IV V Stars III The Epoch 2004 Fe H and Temperature Catalogs The Astrophysical Journal Supplement Series 161 2 444 455 Bibcode 2005ApJS 161 444T doi 10 1086 496885 Vizier catalog entry a b Wittenmeyer et al 2006 Mamajek Eric E Hillenbrand Lynne A November 2008 Improved Age Estimation for Solar Type Dwarfs Using Activity Rotation Diagnostics The Astrophysical Journal 687 2 1264 1293 arXiv 0807 1686 Bibcode 2008ApJ 687 1264M doi 10 1086 591785 S2CID 27151456 Garg Suyog Karak Bidya Binay Egeland Ricky Soon Willie Baliunas Sallie 2019 Waldmeier Effect in Stellar Cycles The Astrophysical Journal 886 2 132 arXiv 1909 12148 Bibcode 2019ApJ 886 132G doi 10 3847 1538 4357 ab4a17 S2CID 202888617 IAU Working Group on Star Names WGSN Retrieved 17 September 2018 IAU Catalog of Star Names International Astronomical Union Retrieved 2018 09 17 Irwin et al 1996 Bill Steigerwald 2019 03 07 Goldilocks Stars May Be Just Right for Finding Habitable Worlds NASA Retrieved 2020 05 12 I find that certain nearby K stars like 61 Cyg A B Epsilon Indi Groombridge 1618 and HD 156026 may be particularly good targets for future biosignature searches said Arney Further reading editIrwin Alan W Yang Stephenson L S amp Walker Gordon A H 1996 36 Ophiuchi AB Incompatibility of the Orbit and Precise Radial Velocities Publications of the Astronomical Society of the Pacific 108 580 Bibcode 1996PASP 108 580I doi 10 1086 133768 Cayrel de Strobel G Lebreton Y Perrin M N amp Cayrel R 1989 A thorough spectroscopic study of the very nearby triple system 36 Ophiuchi Astronomy and Astrophysics 225 2 369 380 Bibcode 1989A amp A 225 369C Wittenmeyer R A Endl Michael Cochran William D Hatzes Artie P Walker G A H Yang S L S amp Paulson Diane B 2006 Detection Limits from the McDonald Observatory Planet Search Program Astronomical Journal 132 1 177 188 arXiv astro ph 0604171 Bibcode 2006AJ 132 177W doi 10 1086 504942 S2CID 16755455 Barnes Sydney A 2007 Ages for Illustrative Field Stars Using Gyrochronology Viability Limitations and Errors The Astrophysical Journal 669 2 1167 1189 arXiv 0704 3068 Bibcode 2007ApJ 669 1167B doi 10 1086 519295 S2CID 14614725External links edit 36 Ophiuchi SolStation Retrieved 3 November 2005 https arxiv org abs astro ph 0604171 Retrieved from https en wikipedia org w index php title 36 Ophiuchi amp oldid 1213474126, wikipedia, wiki, book, books, library,
