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13 Boötis

October 15, 2023

13 Boötis is a solitary[8] variable star in the northern constellation of Boötes, and is positioned near the western constellation border with Ursa Major. It has the variable star designation CF Boötis, often abbreviated CF Boo, while 13 Boötis is the star's Flamsteed designation. This star has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 5.26.[2] It is located at a distance of approximately 700 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −14 km/s.[2]

13 Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 08m 17.30243s[1]
Declination +49° 27′ 29.3993″[1]
Apparent magnitude (V) 5.26[2] (5.29 to 5.38)[3]
Characteristics
Spectral type M1.5III[4]
U−B color index +1.92[5]
B−V color index +1.637±0.010[2]
Variable type Lb[3]
Astrometry
Radial velocity (Rv)−13.92±0.06[2] km/s
Proper motion (μ) RA: −58.584[1] mas/yr
Dec.: 59.801[1] mas/yr
Parallax (π)4.6635 ± 0.1756 mas[1]
Distance700 ± 30 ly
(214 ± 8 pc)
Absolute magnitude (MV)−0.87[2]
Details
Mass0.8-2.6[6] M☉
Radius74+10
−12[1] R☉
Luminosity1,114±48[1] L☉
Temperature3,889+379
−248[1] K
Other designations
13 Boo, CF Boo, BD+50°2047, FK5 3124, GC 19095, HD 123782, HIP 69068, HR 5300, SAO 44905, CCDM 14082+4927, WDS 14083+4927[7]
Database references
SIMBADdata

This is an aging red giant star on the asymptotic giant branch[9] with a stellar classification of M1.5III,[4] which is interpreted by stellar evolutionary models to mean it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. It is classified as a slow irregular variable of the Lb type, and its brightness has been observed to vary from +5.29 down to +5.38.[3] The star has ~74 times the girth of the Sun and is radiating 1,114 times the Sun's luminosity from its swollen photosphere at an effective temperature of 3,889 K.[1]

There is a magnitude 11.05 visual companion located at an angular separation of 76.40 arcseconds from the brighter star, along a position angle of 270°. This was first reported by William Herschel in 1783.[10]

Possible planetary system Edit

In 1991, Duquennoy & Mayor[11] reported the possible presence of a low-mass object (of likely substellar nature) orbiting the red giant 13 Bootis. They set a minimum mass of 30 times that of Jupiter (likely a brown dwarf) and estimated an orbital period of 1.35 years. So far there has been no confirmation about the presence a substellar object.

The 13 Boötis planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (unconfirmed) ≥30 MJ ≥1.25 494 0.21 — —

References Edit

  1. ^ a b c d e f g h i 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. ^ a b c d e f 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.
  3. ^ a b c Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  4. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  5. ^ Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  6. ^ Alvarez, R.; Mennessier, M. -O. (1997). "Determination of Miras temperatures from TiO and VO bands. Estimates of distances". Astronomy and Astrophysics. 317: 761–768. Bibcode:1997A&A...317..761A.
  7. ^ "* 13 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 May 2017.
  8. ^ 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.
  9. ^ Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". Astronomical Journal. 104 (1): 275–313. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
  10. ^ 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.
  11. ^ Duquennoy, A.; Mayor, M. (1991). "Multiplicity among solar-type stars in the solar neighbourhood. II - Distribution of the orbital elements in an unbiased sample". Astronomy and Astrophysics. 248 (2): 485–524. Bibcode:1991A&A...248..485D.

External links Edit

  • HR 5300
  • CCDM J14082+4927
  • Image 13 Boötis
  • [1]
  • [2]

October 15, 2023
boötis, solitary, variable, star, northern, constellation, boötes, positioned, near, western, constellation, border, with, ursa, major, variable, star, designation, boötis, often, abbreviated, while, star, flamsteed, designation, this, star, reddish, faintly, . 13 Bootis is a solitary 8 variable star in the northern constellation of Bootes and is positioned near the western constellation border with Ursa Major It has the variable star designation CF Bootis often abbreviated CF Boo while 13 Bootis is the star s Flamsteed designation This star has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 5 26 2 It is located at a distance of approximately 700 light years from the Sun based on parallax but is drifting closer with a radial velocity of 14 km s 2 13 Bootis Observation dataEpoch J2000 Equinox J2000Constellation BootesRight ascension 14h 08m 17 30243s 1 Declination 49 27 29 3993 1 Apparent magnitude V 5 26 2 5 29 to 5 38 3 CharacteristicsSpectral type M1 5III 4 U B color index 1 92 5 B V color index 1 637 0 010 2 Variable type Lb 3 AstrometryRadial velocity Rv 13 92 0 06 2 km sProper motion m RA 58 584 1 mas yr Dec 59 801 1 mas yrParallax p 4 6635 0 1756 mas 1 Distance700 30 ly 214 8 pc Absolute magnitude MV 0 87 2 DetailsMass0 8 2 6 6 M Radius74 10 12 1 R Luminosity1 114 48 1 L Temperature3 889 379 248 1 KOther designations13 Boo CF Boo BD 50 2047 FK5 3124 GC 19095 HD 123782 HIP 69068 HR 5300 SAO 44905 CCDM 14082 4927 WDS 14083 4927 7 Database referencesSIMBADdataThis is an aging red giant star on the asymptotic giant branch 9 with a stellar classification of M1 5III 4 which is interpreted by stellar evolutionary models to mean it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence It is classified as a slow irregular variable of the Lb type and its brightness has been observed to vary from 5 29 down to 5 38 3 The star has 74 times the girth of the Sun and is radiating 1 114 times the Sun s luminosity from its swollen photosphere at an effective temperature of 3 889 K 1 There is a magnitude 11 05 visual companion located at an angular separation of 76 40 arcseconds from the brighter star along a position angle of 270 This was first reported by William Herschel in 1783 10 Possible planetary system EditIn 1991 Duquennoy amp Mayor 11 reported the possible presence of a low mass object of likely substellar nature orbiting the red giant 13 Bootis They set a minimum mass of 30 times that of Jupiter likely a brown dwarf and estimated an orbital period of 1 35 years So far there has been no confirmation about the presence a substellar object The 13 Bootis planetary system Companion in order from star Mass Semimajor axis AU Orbital period days Eccentricity Inclination Radiusb unconfirmed 30 MJ 1 25 494 0 21 References Edit a b c d e f g h i 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 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 c Samus N N et al 2017 General Catalogue of Variable Stars Astronomy Reports 5 1 61 1 80 88 Bibcode 2017ARep 61 80S doi 10 1134 S1063772917010085 S2CID 125853869 a b Keenan Philip C McNeil Raymond C 1989 The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 Mermilliod J C 1986 Compilation of Eggen s UBV data transformed to UBV unpublished Catalogue of Eggen s UBV Data Bibcode 1986EgUBV 0M Alvarez R Mennessier M O 1997 Determination of Miras temperatures from TiO and VO bands Estimates of distances Astronomy and Astrophysics 317 761 768 Bibcode 1997A amp A 317 761A 13 Boo SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 25 May 2017 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 Eggen Olin J July 1992 Asymptotic giant branch stars near the sun Astronomical Journal 104 1 275 313 Bibcode 1992AJ 104 275E doi 10 1086 116239 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 Duquennoy A Mayor M 1991 Multiplicity among solar type stars in the solar neighbourhood II Distribution of the orbital elements in an unbiased sample Astronomy and Astrophysics 248 2 485 524 Bibcode 1991A amp A 248 485D External links EditHR 5300 CCDM J14082 4927 Image 13 Bootis 1 2 Retrieved from https en wikipedia org w index php title 13 Bootis amp oldid 1142628086, wikipedia, wiki, book, books, library,

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