J/MNRAS/373/1483ivo://CDS.VizieR/J/MNRAS/373/1483doi:10.26093/cds/vizier.73731483CDSEker Z.Demircan O.Bilir S.Karatas Y.2024-07-03T20:14:42Z2007-11-10T22:37:03ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frspectroscopic-binary-starsorbitsstellar-massesOrbital angular momentum (OAM, Jo), systemic mass (M) and orbital period (P) distributions of chromospherically active binaries (CAB) and W Ursae Majoris (W UMa) systems were investigated. The diagrams of and logJo-logP, logM-logP and logJo-logM were formed from 119 CAB and 102 W UMa stars. The log Jo-logM diagram is found to be most meaningful in demonstrating dynamical evolution of binary star orbits. A slightly curved borderline (contact border) separating the detached and the contact systems was discovered on the logJo-logM diagram. Since the orbital size (a) and period (P) of binaries are determined by their current Jo, M and mass ratio, q, the rates of OAM loss (dlogJo/dt) and mass loss (dlogM/dt) are primary parameters to determine the direction and the speed of the dynamical evolution. A detached system becomes a contact system if its own dynamical evolution enables it to pass the contact border on the logJo-logM diagram. The evolution of q for a mass-losing detached system is unknown unless the mass-loss rate for each component is known. Assuming q is constant in the first approximation and using the mean decreasing rates of Jo and M from the kinematical ages of CAB stars, it has been predicted that 11, 23 and 39 per cent of current CAB stars would transform to W UMa systems if their nuclear evolution permits them to live 2, 4 and 6Gyr, respectively.2006MNRAS.373.1483Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/373/1483CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/76 : Chromospherically Active Binaries (Strassmeier+ 1993)J/MNRAS/349/1069 : Chromospherically active binaries (Karatas+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/373/1483https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/373/1483http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/373/1483https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/373/1483https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/373/1483http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/373/1483GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/373/1483/stars (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/373/1483/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/373/1483/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/373/1483/stars?GETtext/xml+votable180.050000true57.604036417.24650610.0055555555555555566/147 311 338 454 493 739 845 1045 1314 1504 1734 1933 2017 2133 2339 2436 2499 2597 2952 3042 3094 3227 3403 3559 3707 4298 4425 4427 4566 4698 4735 4915 5110 5627 5656 5836 6312 6340 7262 7273 7451 7684 7902 8040 8124 8357 8579 8656 8716 8871 9024 9044 9167 9415 9442 9514 9570 9578 9587 9780 9866 9890 9951 10002 10048 10169 10401 10464 10474 10481 10775 10923 11162 11278 11290 11395 11486 11650 12009 12012 12053 12155 12408 12792 12845 12885 13110 13181 13263 13308 13462 13618 13699 13802 13859 13933 13947 13966 14126 14179 14512 14528 15165 15217 15243 16058 16186 16707 17310 17397 17965 17989 18007 18234 18309 18889 18902 19016 19075 19097 19448 19543 19698 19921 19930 19998 20034 20102 20209 20286 20365 21069 21694 21731 21882 21969 22081 22625 22662 22680 22707 22786 22855 23191 23960 24232 24378 24391 24513 24616 25991 26097 26133 26391 26679 27116 27250 27481 27603 27609 27639 27770 27852 28129 28137 28143 28252 28296 28384 28432 28481 28582 28808 29906 30491 30502 30565 30626 31148 31781 31843 31944 31950 31984 32141 32307 32516 32521 32720 32743 33102 33287 33323 35025 35055 35150 36494 36805 36819 37207 37890 38259 39933 40030 40131 40321 41295 41864 42060 43072 43455 44658 44894 46598 47825 48587 48589 48613 48768https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/373/1483?format=asciidefaultJ/MNRAS/373/1483/starsCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTSimbad column added by the CDSsrc.classcharSeqSequential numbermeta.recordintn_Seq[*] Possible member of young group (1)meta.notecharNameNamemeta.id;meta.maincharSpTypeMK spectral typesrc.spTypecharEvolStage of evolution (G, MS, SG) in table1 or type (W, A) in table2 (2)src.class.luminositycharMtotTotal mass (M1+M2)solMassphys.massfloatqMass ratio (M2/M1)phys.massfloatPerOrbital perioddtime.perioddoubleR1? Radius of the primarysolRadphys.size.radiusfloatnullableR2? Radius of the secondarysolRadphys.size.radiusfloatnullablelogJoOrbital angular momentum (OAM) (cgs)log(g.cm**2.s**-1)phys.angMomentumfloatJspin/Jo? Total spin angular momentum as fraction of orbital angular momentumphys.angMomentumfloatnullableSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main