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Kappa Boötis

October 21, 2023

Kappa Boötis (κ Boo, κ Boötis) is a double star in the constellation Boötes. It has the traditional name Asellus Tertius /əˈsɛləs ˈtɜːrʃiəs/ (Latin for "third donkey colt")[13][14] and the Flamsteed designation 17 Boötis. The components are separated by an angular distance of 13.5 arcsec,[14] viewable in a small telescope. Kappa Boötis is approximately 155 light years from Earth.

κ Boötis
Location of κ Boötis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
κ1 Boötis
Right ascension 14h 13m 27.824s[1]
Declination +51° 47′ 16.62″[1]
Apparent magnitude (V) +6.69[2]
κ2 Boötis
Right ascension 14h 13m 29.009s[3]
Declination +51° 47′ 23.88″[3]
Apparent magnitude (V) +4.50 to +4.58[4]
Characteristics
κ1 Boötis
Spectral type F2V[5]
κ2 Boötis
Spectral type A8IV[6]
U−B color index 0.14
B−V color index 0.2
R−I color index 0.12
Variable type Delta Scuti variable[4]
Astrometry
κ1 Boötis
Radial velocity (Rv)−22.09[1] km/s
Proper motion (μ) RA: 44.094[1] mas/yr
Dec.: −39.325[1] mas/yr
Parallax (π)20.3067 ± 0.2221 mas[1]
Distance161 ± 2 ly
(49.2 ± 0.5 pc)
Absolute magnitude (MV)+3.34
κ2 Boötis
Radial velocity (Rv)−15.60[7] km/s
Proper motion (μ) RA: 44.094[3] mas/yr
Dec.: −39.325[3] mas/yr
Parallax (π)21.1980 ± 0.4118 mas[3]
Distance154 ± 3 ly
(47.2 ± 0.9 pc)
Details
κ1 Boötis
Mass1.40[8] M☉
Radius1.43[1] R☉
Luminosity3.801[1] L☉
Surface gravity (log g)4.32[5] cgs
Temperature6,699[9] K
Metallicity [Fe/H]−0.09[9] dex
Rotational velocity (v sin i)38[10] km/s
Age900[9] Myr
κ2 Boötis
Mass2.12[11] M☉
Radius2.78[11] R☉
Luminosity28[6] L☉
Surface gravity (log g)3.66[5] cgs
Temperature7,760[6] K
Metallicity [Fe/H]−0.29[12] dex
Rotational velocity (v sin i)128[8] km/s
Other designations
Asellus Tertius, κ Boo, 17 Boötis, BD+52 1782, HR 5328
κ1 Boötis: HD 124674, HIP 69481, SAO 29045
κ2 Boötis: HD 124675, HIP 69483, SAO 29046
Database references
SIMBADdata
κ1
κ2

Nomenclature Edit

κ2 Boötis, the brighter star of the pair, is also designated HD 124675, while κ1 Boötis is HD 124674. The two stars share the Bright Star Catalogue designation HR 5328, but they have separate entries in the Hipparcos catalogue: HIP 69483 and HIP 69481 respectively.

Properties Edit

 
A visual band light curve for Kappa2 Boötis, adapted from Frandsen et al. (1995)[15]

κ1 Boötis is a spectroscopic binary star system. The visible primary is an F2 main sequence star, while the secondary is half the mass and much fainter.[16]

κ2 Boötis is classified as a Delta Scuti type variable star with a period of 1.08 hours[6] Its brightness varies from magnitude +4.50 to +4.58.[4] It is a slightly evolved A8 subgiant.

A 17th-magnitude star nearly two arc-minutes away has been identified as a member of the multiple system with an estimated orbital period of 177,000 years. It is itself a close binary with two similar low-mass stars in a 234-year orbit.[17]

Etymology Edit

This star, along with the other Aselli (θ Boo and ι Boo) and λ Boo, were Aulād al Dhiʼbah (أولاد الضّباع - awlād al-ḍibā‘), "the Whelps of the Hyenas".[18]

In Chinese, 天槍 (Tiān Qiāng), meaning Celestial Spear, refers to an asterism consisting of κ (actually κ2) Boötis, ι Boötis and θ Boötis.[19] Consequently, the Chinese name for κ Boötis itself is 天槍一 (Tiān Qiāng yī, English: the First Star of Celestial Spear.)[20]

References Edit

  1. ^ a b c d e f g h 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.
  2. ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR On-line Data Catalog. Bibcode:2002yCat.2237....0D.
  3. ^ a b c d e 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.
  4. ^ a b c 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.
  5. ^ a b c Gray, R. O.; Napier, M. G.; Winkler, L. I. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". The Astronomical Journal. 121 (4): 2148. Bibcode:2001AJ....121.2148G. doi:10.1086/319956.
  6. ^ a b c d Balona, L. A.; Dziembowski, W. A. (October 1999). "Excitation and visibility of high-degree modes in stars". Monthly Notices of the Royal Astronomical Society. 309 (1): 221–232. Bibcode:1999MNRAS.309..221B. doi:10.1046/j.1365-8711.1999.02821.x.
  7. ^ Gontcharov, G. A. (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.
  8. ^ a b Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
  9. ^ a b c Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy and Astrophysics. 530: A138. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.
  10. ^ Royer, F.; Grenier, S.; Baylac, M. -O.; Gómez, A. E.; Zorec, J. (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:1201.2052. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. S2CID 14070763.
  11. ^ a b Liakos, 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. S2CID 119284575.
  12. ^ Gáspár, András; Rieke, George H.; Ballering, Nicholas (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637x/826/2/171. S2CID 119241004.
  13. ^ Star Name - R.H.Allen p.105
  14. ^ a b Kaler, Jim. "Asellus Tertius". Retrieved 2017-09-06.
  15. ^ Frandsen, S.; Jones, A.; Kjeldsen, H.; Viskum, M.; Hjorth, J.; Andersen, N. H.; Thomsen, B. (September 1995). "CCD photometry of the δ-Scuti star κ2 Bootis". Astronomy and Astrophysics. 301: 123. Bibcode:1995A&A...301..123F. Retrieved 3 September 2022.
  16. ^ Halbwachs, J. -L; Arenou, F.; Pourbaix, D.; Famaey, B.; Guillout, P.; Lebreton, Y.; Salomon, J. -B.; Tal-Or, L.; Ibata, R.; Mazeh, T. (2014). "Masses of the components of SB2 binaries observed with Gaia - I. Selection of the sample and mass ratios of 20 new SB2s discovered with Sophie". Monthly Notices of the Royal Astronomical Society. 445 (3): 2371. arXiv:1409.1384. Bibcode:2014MNRAS.445.2371H. doi:10.1093/mnras/stu1838. S2CID 119180931.
  17. ^ Tokovinin, Andrei (2018-03-01). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5. ISSN 0067-0049. S2CID 119047709.
  18. ^ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York: Dover Publications Inc. p. 105. ISBN 978-0-486-21079-7. Retrieved 2010-12-12.
  19. ^ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  20. ^ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 2010-08-11 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.

External links Edit

  • HR 5329
  • HR 5328
  • CCDM J14135+5147
  • Image Kappa Boötis

October 21, 2023
kappa, boötis, boötis, double, star, constellation, boötes, traditional, name, asellus, tertius, ɜːr, latin, third, donkey, colt, flamsteed, designation, boötis, components, separated, angular, distance, arcsec, viewable, small, telescope, approximately, light. Kappa Bootis k Boo k Bootis is a double star in the constellation Bootes It has the traditional name Asellus Tertius e ˈ s ɛ l e s ˈ t ɜːr ʃ i e s Latin for third donkey colt 13 14 and the Flamsteed designation 17 Bootis The components are separated by an angular distance of 13 5 arcsec 14 viewable in a small telescope Kappa Bootis is approximately 155 light years from Earth k BootisLocation of k Bootis circled Observation dataEpoch J2000 Equinox J2000Constellation Bootesk1 BootisRight ascension 14h 13m 27 824s 1 Declination 51 47 16 62 1 Apparent magnitude V 6 69 2 k2 BootisRight ascension 14h 13m 29 009s 3 Declination 51 47 23 88 3 Apparent magnitude V 4 50 to 4 58 4 Characteristicsk1 BootisSpectral type F2V 5 k2 BootisSpectral type A8IV 6 U B color index 0 14B V color index 0 2R I color index 0 12Variable type Delta Scuti variable 4 Astrometryk1 BootisRadial velocity Rv 22 09 1 km sProper motion m RA 44 094 1 mas yr Dec 39 325 1 mas yrParallax p 20 3067 0 2221 mas 1 Distance161 2 ly 49 2 0 5 pc Absolute magnitude MV 3 34k2 BootisRadial velocity Rv 15 60 7 km sProper motion m RA 44 094 3 mas yr Dec 39 325 3 mas yrParallax p 21 1980 0 4118 mas 3 Distance154 3 ly 47 2 0 9 pc Detailsk1 BootisMass1 40 8 M Radius1 43 1 R Luminosity3 801 1 L Surface gravity log g 4 32 5 cgsTemperature6 699 9 KMetallicity Fe H 0 09 9 dexRotational velocity v sin i 38 10 km sAge900 9 Myrk2 BootisMass2 12 11 M Radius2 78 11 R Luminosity28 6 L Surface gravity log g 3 66 5 cgsTemperature7 760 6 KMetallicity Fe H 0 29 12 dexRotational velocity v sin i 128 8 km sOther designationsAsellus Tertius k Boo 17 Bootis BD 52 1782 HR 5328k1 Bootis HD 124674 HIP 69481 SAO 29045k2 Bootis HD 124675 HIP 69483 SAO 29046Database referencesSIMBADdatak1k2 Contents 1 Nomenclature 2 Properties 3 Etymology 4 References 5 External linksNomenclature Editk2 Bootis the brighter star of the pair is also designated HD 124675 while k1 Bootis is HD 124674 The two stars share the Bright Star Catalogue designation HR 5328 but they have separate entries in the Hipparcos catalogue HIP 69483 and HIP 69481 respectively Properties Edit nbsp A visual band light curve for Kappa2 Bootis adapted from Frandsen et al 1995 15 k1 Bootis is a spectroscopic binary star system The visible primary is an F2 main sequence star while the secondary is half the mass and much fainter 16 k2 Bootis is classified as a Delta Scuti type variable star with a period of 1 08 hours 6 Its brightness varies from magnitude 4 50 to 4 58 4 It is a slightly evolved A8 subgiant A 17th magnitude star nearly two arc minutes away has been identified as a member of the multiple system with an estimated orbital period of 177 000 years It is itself a close binary with two similar low mass stars in a 234 year orbit 17 Etymology EditThis star along with the other Aselli 8 Boo and i Boo and l Boo were Aulad al Dhiʼbah أولاد الض باع awlad al ḍiba the Whelps of the Hyenas 18 In Chinese 天槍 Tian Qiang meaning Celestial Spear refers to an asterism consisting of k actually k2 Bootis i Bootis and 8 Bootis 19 Consequently the Chinese name for k Bootis itself is 天槍一 Tian Qiang yi English the First Star of Celestial Spear 20 References Edit a b c d e f g h 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 Ducati J R 2002 VizieR Online Data Catalog Catalogue of Stellar Photometry in Johnson s 11 color system VizieR On line Data Catalog Bibcode 2002yCat 2237 0D a b c d e 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 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 a b c Gray R O Napier M G Winkler L I 2001 The Physical Basis of Luminosity Classification in the Late A F and Early G Type Stars I Precise Spectral Types for 372 Stars The Astronomical Journal 121 4 2148 Bibcode 2001AJ 121 2148G doi 10 1086 319956 a b c d Balona L A Dziembowski W A October 1999 Excitation and visibility of high degree modes in stars Monthly Notices of the Royal Astronomical Society 309 1 221 232 Bibcode 1999MNRAS 309 221B doi 10 1046 j 1365 8711 1999 02821 x Gontcharov G A 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 Zorec J Royer F Asplund Martin Cassisi Santi Ramirez Ivan Melendez Jorge Bensby Thomas Feltzing Sofia 2012 Rotational velocities of A type stars IV Evolution of rotational velocities Astronomy and Astrophysics 537 A120 arXiv 1201 2052 Bibcode 2012A amp A 537A 120Z doi 10 1051 0004 6361 201117691 S2CID 55586789 a b c Casagrande L Schonrich R Asplund M Cassisi S Ramirez I Melendez J Bensby T Feltzing S 2011 New constraints on the chemical evolution of the solar neighbourhood and Galactic disc s Improved astrophysical parameters for the Geneva Copenhagen Survey Astronomy and Astrophysics 530 A138 arXiv 1103 4651 Bibcode 2011A amp A 530A 138C doi 10 1051 0004 6361 201016276 S2CID 56118016 Royer F Grenier S Baylac M O Gomez A E Zorec J 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 1201 2052 Bibcode 2002A amp A 393 897R doi 10 1051 0004 6361 20020943 S2CID 14070763 a b 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 S2CID 119284575 Gaspar Andras Rieke George H Ballering Nicholas 2016 The Correlation between Metallicity and Debris Disk Mass The Astrophysical Journal 826 2 171 arXiv 1604 07403 Bibcode 2016ApJ 826 171G doi 10 3847 0004 637x 826 2 171 S2CID 119241004 Star Name R H Allen p 105 a b Kaler Jim Asellus Tertius Retrieved 2017 09 06 Frandsen S Jones A Kjeldsen H Viskum M Hjorth J Andersen N H Thomsen B September 1995 CCD photometry of the d Scuti star k2 Bootis Astronomy and Astrophysics 301 123 Bibcode 1995A amp A 301 123F Retrieved 3 September 2022 Halbwachs J L Arenou F Pourbaix D Famaey B Guillout P Lebreton Y Salomon J B Tal Or L Ibata R Mazeh T 2014 Masses of the components of SB2 binaries observed with Gaia I Selection of the sample and mass ratios of 20 new SB2s discovered with Sophie Monthly Notices of the Royal Astronomical Society 445 3 2371 arXiv 1409 1384 Bibcode 2014MNRAS 445 2371H doi 10 1093 mnras stu1838 S2CID 119180931 Tokovinin Andrei 2018 03 01 The Updated Multiple Star Catalog The Astrophysical Journal Supplement Series 235 1 6 arXiv 1712 04750 Bibcode 2018ApJS 235 6T doi 10 3847 1538 4365 aaa1a5 ISSN 0067 0049 S2CID 119047709 Allen R H 1963 Star Names Their Lore and Meaning Reprint ed New York Dover Publications Inc p 105 ISBN 978 0 486 21079 7 Retrieved 2010 12 12 in Chinese 中國星座神話 written by 陳久金 Published by 台灣書房出版有限公司 2005 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 2010 08 11 at the Wayback Machine Hong Kong Space Museum Accessed on line November 23 2010 External links EditHR 5329 HR 5328 CCDM J14135 5147 Image Kappa Bootis Retrieved from https en wikipedia org w index php title Kappa Bootis amp oldid 1171337888, wikipedia, wiki, book, books, library,

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