Abstract Details
| Name: Avrajit bandyopadhyay Affiliation: Indian Institute of Astrophysics Conference ID: ASI2016_701 Title : Metal poor weak-G-band stars in the halo and globular clusters: exploring the common origin Authors and Co-Authors : Ms Susmitha Rani Antony,IIA Dr. Sivarani Thirupathi , IIA Dr. Sunetra Giridhar, IIA Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Despite the globular clusters being old stellar systems in the halo, their chemical abundances have many differences with those of the halo stars. Here we shall present the study of Weak G band stars in the Galactic halo and compare their properties with members of some Galactic globular clusters. Abundance inhomogeneities like C-N,O-Na and Mg-Al anti-correlation is observed in all massive globular clusters. Such peculiarities are rare among halo stars. This abundance peculiarity is one of the important tools for identifying stars in the halo that were born inside a globular cluster. To understand the connection between the Globular cluster and the Milkyway halo stars, high resolution spectra of stars with weak G band has been observed, using the newly commissioned Hanle Echelle spectrograph. Such carbon depleted stars are ideal candidates to test for the C-N anomaly observed in clusters and its possible origin using high resolution spectroscopy of bright halo stars. |