| Name: Shubh Mittal |
| Affiliation: Inter-University Centre For Astronomy And Astrophysics |
| Conference ID: ASI2026_137 |
| Title: High Resolution Spectroscopy of Type II Cepheids in Milk Way |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Shubh Mittal(Inter-University Centre for Astronomy and Astrophysics, Pune - 411007, India), Anupam Bhardwaj(Inter-University Centre for Astronomy and Astrophysics, Pune - 411007, India) |
| Abstract: Precise distance measurements of variable stars such as Type II Cepheids in the Milky Way fields are crucial for calibrating the first rung of the cosmic distance ladder. An important aspect of this application is the understanding of the effect of metallicities on the absolute luminosities of Type II Cepheids. Using High-Resolution Spectroscopy on the HRS data obtained from the South African Large Telescope (SALT), we calculated radial velocities, stellar atmosphere parameters, metallicity, and elemental abundances of Type II Cepheids. Additionally, we present the "Stellar Atmosphere Parameter Estimation" (SAPE) module, which is used to perform these calculations. SAPE utilizes PyMoog for Kurucz stellar atmospheric models in Local Thermodynamic Equilibrium (LTE) for abundance calculation and spectral synthesis for comparison with the observed spectra. |
