| Name: FARHA A A |
| Affiliation: University of Calicut |
| Conference ID: ASI2026_779 |
| Title: Isotopic Ratios as Tracers of Different Nucleosynthesis Processes |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Farha A A(University of Calicut), Drisya Karinkuzhi(University of Calicut, Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles), Sophie Van Eck(nstitut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles) |
| Abstract: Low- to intermediate-mass stars (LIMS) constitute the dominant stellar population in galaxies. Through a variety of nucleosynthetic reactions, these stars play a crucial role in the chemical evolution of the Universe. Detailed elemental abundances in stars at various metallicities and their interpretation are observational aids for understanding galactic chemical evolution. Despite this, the exact conditions under which nucleosynthetic reactions occur and their contribution to galactic chemical evolution remain an open question. The GCE models generally try to explain the origin and evolution of chemical elements by deriving abundances of chemical elements in stars along with yield predictions from theoretical models. However, most of the chemical elements have multiple stable isotopes and different nucleosynthetic reactions may be contributing to their production. The situation will be more complex in the case of heavy elements produced by different neutron capture processes. The isotopic abundances are thus important to constrain the conditions at which the nucleosynthesis takes place and also to identify the actual isotopic path followed by the different neutron capture processes. This will help us identify the relative contribution of different neutron capture processes to the abundance of individual elements, which is an essential ingredient of the GCE models. Thus the contribution of different astrophysical sites to the overall chemical enrichment of our Galaxy can be estimated with greater accuracy. We selected the high-resolution UVES/ESO spectra for a sample of stars for the analysis. The atmospheric parameters and abundances are then derived under non-local thermodynamic equilibrium (NLTE) conditions using the recent version of the TURBOSPECTRUM radiative transfer code. In this work, we derive isotopic ratios of the neutron-capture elements Eu and Ba, as well as the light element Mg, whose isotopic composition provides key constraints on stellar evolution and nucleosynthesis in LIMS. We will discuss the preliminary results during the presentation. |
