Abstract Details
| Name: athira unni Affiliation: IIA, Bengaluru Conference ID: ASI2019_76 Title : Precision chemical abundances of exoplanet host stars Authors and Co-Authors : Athira Unni & Sivarani Thirupathi Abstract Type : Oral Abstract Category : Stars, ISM and Galaxy Abstract : It is now known that the exoplanet atmospheres and the host stars show a large diversity in their chemical composition. There has been several observational efforts to identify possible correlation between the host star chemical abundances the planet properties. One of the well known correlation is the occurrence of gas giants and the high metallicity of the host star (Gonzalez 1997, Gonzales 1998, Santos et al. 2001, 2003, Reid 2002, Fischer and Valenti 2005). These observational data is taken as a support the core accretion model of planet formation, in which a core is formed that helps in fast accretion of gas in the proto-planetary disk in forming a gas giant. This primordial versus self enrichment scenario (Gonzalez 1997) can be distinguished by comparing abundances of refractory elements (Fe group,alpha elements etc.) to volatile (C, N, O, S, Zn). We studied, differential abundance analysis of stellar twins in binary system. This offers a unique possibility to study accurate differential abundances that provide clues to the planet formation process. We also looked into the statistical study of the abundance of different elements in the Kepler-MARVELS survey. Here, we present preliminary results from both the studies. |