Binary star system in the constellation Carina
HR 3220 is abinary star system in the southernconstellation ofCarina . It has theBayer designation B Carinae ;HR 3220 is the designation from theBright Star Catalogue apparent visual magnitude of 4.75.[ 2] parallax measurements, it is located at a distance of 59 light years from theSun . The system is drifting further away with aradial velocity of +24 km/s.[ 4]
This is a single-linedspectroscopic binary system with anorbital period of 2.46 years and aneccentricity of 0.12.[ 6] F-type main sequence star with astellar classification ofF6 V Fe-0.8 CH-0.4 ,[ 3] methylidyne radical . The secondary is most likely a heliumwhite dwarf with 0.47 times the mass of the Sun. Mass transfer from the white dwarf progenitor has given the primary the spectral signature of ablue straggler that appears much younger than its actual age of about 10 billion years.[ 7]
^a b c d e f g h 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for this source atVizieR .^a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data ,SIMBAD ,Bibcode :1986EgUBV........0M . ^a b Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample",The Astronomical Journal 132 (1):161– 170,arXiv :astro-ph/0603770 Bibcode :2006AJ....132..161G ,doi :10.1086/504637 ,S2CID 119476992 . ^a b Nordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs",Astronomy and Astrophysics ,418 :989– 1019,arXiv :astro-ph/0405198 Bibcode :2004A&A...418..989N ,doi :10.1051/0004-6361:20035959 ,S2CID 11027621 . ^a b Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?",Astronomy & Astrophysics ,542 : A116,arXiv :1204.2459 Bibcode :2012A&A...542A.116A ,doi :10.1051/0004-6361/201118724 ,S2CID 53666672 . ^a b Murdoch, K.; Hearnshaw, J. B. (June 1993), "The orbit of the spectroscopic binary HR 3220",The Observatory ,113 :126– 127,Bibcode :1993Obs...113..126M . ^a b c d e f Fuhrmann, K.; et al. (September 2011), "Discovery of the nearby F6V star HR 3220 as a field blue straggler",Monthly Notices of the Royal Astronomical Society ,416 (1):391– 392,Bibcode :2011MNRAS.416..391F ,doi :10.1111/j.1365-2966.2011.19042.x ^ "HD 68456" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-12-04 .
