Evidences on secular dynamical evolution of detached active binary orbits and contact binary formation

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dc.contributor.authorEker, Z.
dc.contributor.authorDemircan, O.
dc.contributor.authorBilir, S.
dc.contributor.authorKaratas, Y.
dc.date.accessioned2025-01-27T20:12:28Z
dc.date.available2025-01-27T20:12:28Z
dc.date.issued2007
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.descriptionWorkshop on Solar and Stellar Physics through Eclipses -- MAR 27-29, 2006 -- Ankara Univ, ORSEM Campus, Side, Antalya, TURKEY
dc.description.abstractEvidence of secular dynamical evolution for detached active binary orbits are presented. First order decreasing rates of orbital angular momentum (OAM), systemic mass (M = M-1 + M-2) and orbital period of detached active binaries have been determined a J/J = 3.48 x 10(-10)yr(-1),M/M = 1.30 x 10(10)yr(-1) and P/P 3.96 x 10(-10)yr(-1) from the kinematical ages of 62 field detached systems. The ratio of d log J/ d log M = 2.68 implies that either there are mechanisms which amplify AM loss delta = 2.68 times with respect to isotropic AM loss of hypothetical isotropic winds or there exist external causes contributing AM loss in order to produce this mean rate of decrease for orbital periods. Various decreasing rates of OAM (d log J /dt) and systemic mass (d log M /dt) determine various speeds of dynamical evolutions towards a contact configuration. According to average dynamical evolution with delta = 2.68, the fraction of 10, 22 and 39 per cent of current detached sample is expected to be contact system within 2, 4 and 6 Gyr respectively.
dc.description.sponsorshipCOMU BAP [2005/108]; University of Istanbul [244/23082004]; TUBITAK [104T508]
dc.description.sponsorshipThis work has been partially supported by COMU BAP 2005/108, Research Fund of the University of Istanbul (244/23082004) and TUBITAK 104T508.
dc.identifier.endpage+
dc.identifier.isbn978-1-583812-38-9
dc.identifier.startpage151
dc.identifier.urihttps://hdl.handle.net/20.500.12428/20951
dc.identifier.volume370
dc.identifier.wosWOS:000246823600020
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherAstronomical Soc Pacific
dc.relation.ispartofSolar and Stellar Physics Through Eclipses
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectAngular-Momentum Loss
dc.subjectEclipsing Binaries
dc.subjectPeriod Decrease
dc.subjectDisk Population
dc.subjectStellar Groups
dc.subjectStars
dc.subjectKinematics
dc.subjectSystems
dc.subjectBraking
dc.subjectAge
dc.titleEvidences on secular dynamical evolution of detached active binary orbits and contact binary formation
dc.typeConference Object

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