Star in the constellation Boötes
BX Boötis is astar in the northernconstellation ofBoötes . It is a dim star near the lower limit of visibility to thenaked eye , having a nominalapparent visual magnitude of 6.35.[ 10] parallax shift ofmas [ 2] light years away. At that distance, the visual magnitude of the star is diminished by anextinction of 0.13 due tointerstellar dust .[ 13] radial velocity of −11 km/s.[ 8]
The variability of BX Boötis was probably discovered by Gerhard Robert Miczaika. It was announced in a 1954IAU publication, where he discusses photo-electric measurements of spectrum variables. He wrote "The magnetic-field variable HD 133129 is likewise variable in magnitude with a small amplitude."[ 15] et al. apparently concluded there was atypographical error in Miczaika's announcement, because they cited Miczaika's 1954 announcement when they gave BX Boötis itsvariable star designation in 1972.[ 16]
This is a magneticCP star [ 1] stellar classification ofA0 Vsp SiSrCr ,[ 4] A-type main-sequence star . Thespectrum has very weaklines of helium but displays strong overabundances ofsilicon and all of the heavier elements except nickel.[ 17] Alpha² Canum Venaticorum variable [ 7] [ 3] [ 1]
BX Boötis is 235[ 13] projected rotational velocity of 30[ 12] [ 9] mass of the Sun and 2.5[ 10] Sun's radius . The star is radiating around 72[ 9] Sun's luminosity from itsphotosphere at aneffective temperature of 9,164 K.[ 11]
^a b c d Adelman, Saul J. (June 2008), "FCAPT uvby Photometry of the mCP Stars HR 1297, 25 Sex, BX Boo, and 49 Her",Publications of the Astronomical Society of the Pacific ,120 (868):595– 601,Bibcode :2008PASP..120..595A ,doi :10.1086/588680 S2CID 122107251 . ^a b c d e f 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 ^a b Watson, Christopher (January 4, 2010),"BX Boötis" ,AAVSO Website ,American Association of Variable Star Observers , retrieved5 August 2014 . ^a b Abt, H. A.; Cardona, O. (1984), "The nature of the visual companions of AP and AM stars",Astrophysical Journal ,276 : 266,Bibcode :1984ApJ...276..266A ,doi :10.1086/161610 . ^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications",Astronomical Journal ,74 :375– 406,Bibcode :1969AJ.....74..375C ,doi :10.1086/110819 . ^a b 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 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1",Astronomy Reports ,61 (1):80– 88,Bibcode :2017ARep...61...80S ,doi :10.1134/S1063772917010085 ,S2CID 125853869 . ^a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project",Astronomy & Astrophysics ,546 : 14,arXiv :1208.3048 Bibcode :2012A&A...546A..61D ,doi :10.1051/0004-6361/201219219 ,S2CID 59451347 , A61. ^a b c d Kochukhov, O.; Bagnulo, S. (2006), "Evolutionary state of magnetic chemically peculiar stars",Astronomy and Astrophysics ,450 (2): 763,arXiv :astro-ph/0601461 Bibcode :2006A&A...450..763K ,doi :10.1051/0004-6361:20054596 ,S2CID 18596834 . ^a b c Shulyak, D.; et al. (September 2014), "Interferometry of chemically peculiar stars: theoretical predictions versus modern observing facilities",Monthly Notices of the Royal Astronomical Society ,443 (2):1629– 1642,arXiv :1406.6093 Bibcode :2014MNRAS.443.1629S ,doi :10.1093/mnras/stu1259 S2CID 96452769 . ^a b c d Soubiran, C.; Le Campion, J.-F.; Cayrel de Strobel, G.; Caillo, A. (June 2010), "The PASTEL catalogue of stellar parameters",Astronomy and Astrophysics ,515 : A111,arXiv :1004.1069 Bibcode :2010A&A...515A.111S ,doi :10.1051/0004-6361/201014247 ,S2CID 118362423 . ^a b Strom, Stephen E.; et al. (2005), "B Star Rotational Velocities in h and χ Persei: A Probe of Initial Conditions during the Star Formation Epoch?",The Astronomical Journal ,129 (2):809– 828,arXiv :astro-ph/0410337 Bibcode :2005AJ....129..809S ,doi :10.1086/426748 ,S2CID 15059129 . ^a b c Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars",Astronomy Letters ,38 (11):694– 706,arXiv :1606.09028 Bibcode :2012AstL...38..694G ,doi :10.1134/S1063773712110035 ,S2CID 119108982 . ^ "HD 46052" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved22 August 2018 .^ Miczaika, G. R. (September 1954)."Photometric Measurements of Magnetic-Field and Spectrum Variables" (PDF) .Transactions of the International Astronomical Union .8 : 805. Retrieved3 December 2024 . ^ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (September 1972)."58th Name-List of Variable Stars" (PDF) .Information Bulletin on Variable Stars .717 .Bibcode :1972IBVS..717....1K . Retrieved2 December 2024 . ^ López-García, Z.; Adelman, S. J. (June 1999), "Elemental abundance studies of CP stars. II. The silicon stars HD 133029 and HD 192913",Astronomy and Astrophysics Supplement ,137 (2):227– 232,Bibcode :1999A&AS..137..227L ,doi :10.1051/aas:1999247
