15 Boötis

15 Boötis
Observation data; Epoch J2000 Equinox J2000
Constellation	Boötes
Right ascension	14h 14m 50.85024s
Declination	+10° 06′ 02.1964″
Apparent magnitude (V)	5.45 (5.51 + 8.53)
Characteristics
Spectral type	K1 III
B−V color index	1.007±0.003
Astrometry
Radial velocity (Rv)	+16.80±0.40 km/s
Proper motion (μ)	RA: −20.83 mas/yr ; Dec.: −164.41 mas/yr
Parallax (π)	12.31 ± 0.59 mas
Distance	260 ± 10 ly ; (81 ± 4 pc)
Absolute magnitude (MV)	0.75
Details
Mass	1.48±0.42 M☉
Radius	10 R☉
Luminosity	61.08 L☉
Surface gravity (log g)	2.55±0.11 cgs
Temperature	4,845±92 K
Metallicity [Fe/H]	−0.26 dex
Rotational velocity (v sin i)	0.0 km/s
Age	2.0+0.8; −0.6 Myr
Other designations
	15 Boo, BD+10°2654, FK5 3131, GC 19226, HD 124679, HIP 69612, HR 5330, SAO 100934, CCDM 14148+1006, WDS J14148+1006
Database references
SIMBAD	data

15 Boötis is a binary star^[2] system in the northern constellation of Boötes,^[8] located approximately 260 light years away from the Sun.^[1] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.45.^[2] The system has a relatively high proper motion, traversing the celestial sphere at the rate of 0.166 arc seconds per annum.^[9] It is moving away from the Earth with a heliocentric radial velocity of +16.8 km/s.^[4]

The magnitude 5.51^[2] primary, designated component A, is an aging K-type giant star with a stellar classification of K1 III.^[3] It is a red clump giant,^[7] which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. It is around two^[5] billion years old with 1.5^[5] times the mass of the Sun and has expanded to 10^[6] times the Sun's radius. The star is radiating 61^[4] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,845 K.^[5]

Its companion, component B, is a magnitude +8.53 star^[2] was located at an angular separation of 0.80″ along a position angle of 111° from the primary, as of 2015. This is the same separation it had when the system was discovered in 1936.^[10]

References

^ ^a ^b ^c ^d ^e ^f van 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.
^ ^a ^b ^c ^d ^e 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 Harlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II", Astronomical Journal, 75 (2): 165–166, Bibcode:1970AJ.....75..165H, doi:10.1086/110956.
^ ^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 ^d ^e ^f ^g Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal, 817 (1): 40, arXiv:1511.04088, Bibcode:2016ApJ...817...40F, doi:10.3847/0004-637x/817/1/40, S2CID 118675933.
^ ^a ^b ^c Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397
^ ^a ^b Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.
^ ^a ^b "15 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 7, 2019.
^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.
^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22.

[vanLeeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f van 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.

[Eggleton2008-2] 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.

[Harlan1970-3] Harlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II", Astronomical Journal, 75 (2): 165–166, Bibcode:1970AJ.....75..165H, doi:10.1086/110956.

[Anderson2012-4] ^ ^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.

[Feuillet2016-5] ^ ^a ^b ^c ^d ^e ^f ^g Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal, 817 (1): 40, arXiv:1511.04088, Bibcode:2016ApJ...817...40F, doi:10.3847/0004-637x/817/1/40, S2CID 118675933.

[Massarotti2008-6] Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397

[Alves2000-7] Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.

[SIMBAD-8] "15 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 7, 2019.

[Lepine2005-9] Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.

[WDSC2014-10] Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

15 Boötis

References

Information related to 15 Boötis

Portal di Ensiklopedia Dunia