From Wikipedia, the free encyclopedia
Star in the constellation Carina
This article is about r Carinae. For the variable star, see
R Carinae .
HD 91942 is a single[ 9] variable star in theconstellation Carina .It has theBayer designation r Carinae ,whileHD 91942 is the identifier from theHenry Draper catalogue apparent visual magnitude of 4.45.[ 2] parallax measurements, it is located at a distance of approximately 1,180light years from theSun .[ 1] absolute magnitude of −3.77,[ 2] radial velocity of +9.9 km/s.[ 2]
This object is a massive, agingbright giant with astellar classification of K3II-IIb.[ 4] variable star that fluctuates in magnitude by anamplitude of 0.05 in the B-band of theUBV photometric system .[ 5] core ,it hasevolved of themain sequence and cooled and expanded to 156[ 7] Sun's radius .It is an estimated 36[ 6] [ 6] mass of the Sun .It is radiating around 5,500[ 7] luminosity of the Sun from its swollenphotosphere at aneffective temperature of 3,983 K.[ 7]
^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 ^a b c d e f g 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 Lèbre, A.; de Laverny, P.; Do Nascimento, J. D. Jr.; de Medeiros, J. R. (May 2006), "Lithium abundances and rotational behavior for bright giant stars",Astronomy and Astrophysics ,450 (3): 1173–1179,Bibcode :2006A&A...450.1173L ,doi :10.1051/0004-6361:20053485 ^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 . ^a b 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 c d Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun",Monthly Notices of the Royal Astronomical Society ,410 (1): 190–200,arXiv :1007.4883 Bibcode :2011MNRAS.410..190T ,doi :10.1111/j.1365-2966.2010.17434.x S2CID 118629873 . ^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 Gaia DR2 record for this source atVizieR .^ "HD 91942" .SIMBAD Centre de données astronomiques de Strasbourg .Retrieved2020-01-30 .^ 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 .
