Binary star system in the constellation Carina
This article is about C Carinae. For
c Carinae , see
HD 76728 .
HD 69863 is abinary star [ 11] constellation ofCarina . It is visible to the naked eye as a dim point of light with a combinedapparent visual magnitude of 5.16.[ 6] light years from theSun based onparallax .[ 1] [ 3] Carl Rümker .[ 12] angular separation of″ position angle of 70°.[ 2]
The brighter primary, designated component A, has a visual magnitude of 5.27[ 2] A-type main-sequence star with astellar classification of A2V.[ 4] [ 7] projected rotational velocity of 191 km/s.[ 9] mass of the Sun .[ 7]
The magnitude 7.62[ 2] F-type main-sequence star with a class of F2V.[ 5] [ 3] luminosity of the Sun from itsphotosphere at aneffective temperature of 6,806 K.[ 3] X-ray emission , which is most likely coming from the secondary.[ 13]
^a b c d e f g 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 atVizieR .^a b c d e 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 ^a b c d e f g h i j k 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 atVizieR .^a b Houk, Nancy; Cowley, A. P. (1979),Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan,Bibcode :1978mcts.book.....H ^a b Corbally, C. J. (1984), "Close visual binaries. I. MK classifications",Astrophysical Journal Supplement Series ,55 : 657,Bibcode :1984ApJS...55..657C ,doi :10.1086/190973 . ^a b c d 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 Gullikson, Kevin; et al. (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars",The Astronomical Journal ,152 (2): 40,arXiv :1604.06456 Bibcode :2016AJ....152...40G ,doi :10.3847/0004-6256/152/2/40 S2CID 119179065 . ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars",Monthly Notices of the Royal Astronomical Society ,427 (1): 343,arXiv :1208.2037 Bibcode :2012MNRAS.427..343M ,doi :10.1111/j.1365-2966.2012.21873.x S2CID 118665352 . ^a b Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i",Astronomy and Astrophysics ,393 :897– 911,arXiv :astro-ph/0205255 Bibcode :2002A&A...393..897R ,doi :10.1051/0004-6361:20020943 ,S2CID 14070763 ^ "HD 69863" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2020-01-07 .^ 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 . ^ Letchford, Roderick; et al. (April 2017), "The Southern Double Stars of Carl Rümker I: History, Identification, Accuracy",Journal of Double Star Observations ,13 (2):220– 232,Bibcode :2017JDSO...13..220L . ^ Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars",Astronomy and Astrophysics ,475 (2): 677−684,Bibcode :2007A&A...475..677S ,doi :10.1051/0004-6361:20077429
