Speaker
Prof.
Aruna Goswami
(Associate professor)
Description
The halo system of the Milky Way comprises the vast majority of the presently observed metal-poor ([Fe/H]< -1.0) and very metal-poor ([Fe/H] < -2.0) stars. Among these metal-poor stars, a sizable fraction (~30%) show carbon enhancement ([C/Fe] > 1.0). These stars are called Carbon-Enhanced Metal-Poor (CEMP) stars. Studies of these objects are of special interest, since they bear the fossil records of nucleosynthesis of the first generation of stars and thus provide insight into the nucleosynthesis and chemical evolution of the early universe. In the recent past, although these stars have drawn considerable attention as far as their spectroscopic studies are concerned, several questions still remain poorly understood such as the origin and the production mechanism(s) of carbon and neutron-capture elements exhibited by these objects. A comprehensive study of the abundance patterns of various heavy elements in these objects can give important clues to these questions. We have undertaken to perform chemical composition studies of a selected sample of CEMP stars using the 2-m HCT/HESP and ESO-MPI/FEROS. The abundance distribution patterns and the elemental abundance ratios are critically examined to understand their origin and evolution. We will present some results obtained from our recent spectroscopic studies. Such studies can be highly enhanced through BINA collaborations involving many institutes.
Primary author
Ms
Meenakshi Purandardas
(Student)
Co-author
Prof.
Aruna Goswami
(Associate professor)
