Abstract Details
| Name: K. Sriram Affiliation: Department of Astronomy Conference ID: ASI2018_1297 Title : Investigating the dynamical instability criterion for asynchronous binary systems Authors and Co-Authors : Sriram K., Malu S., P Vivekananda Rao Abstract Type : Contributed Talk Abstract Category : Stars,ISM and the Galaxy Abstract : Low mass ratio contact binary systems are potential candidates for merger, thus making their study extremely crucial. In this work we study the dynamical instability criterion in terms of the critical mass ratio of a contact binary system. The merger hypothesis of a binary system requires it to enter into a phase of tidal instability which would then result in the components spiraling in towards an ultimate merger. Rasio (1995) used the Roche lobe limits estimated by Eggleton (1983) to arrive at a critical separation between the two components and it was shown that the minimum mass ratio (qmin) of the contact binary system would depend upon the dimensionless gyration radius (k1) of the primary component, which would vary for convective and radiative systems. In general, to arrive at such a result the system is considered to be synchronous with its orbit and with each other. In the present study, we investigated the dependence of minimum mass ratio of the contact binary system on the dimensionless gyration radii of the components by introducing asynchronocity parameters in the orbital and spin angular momentum of the system. We found that the minimum mass ratio would increase for asynchronous systems depending on the structure of the primary component. |