Atmospheric Parameters and Abundances of Cool Red Giant Stars
Abstract
Understanding the atmospheric parameters of stars on the top of the RGB is essential to reveal the chemical composition of the Milky Way, as they can be used to probe the farthest parts of our Galaxy. Our goal is to determine the chemical composition of 21 RGB stars with T eff < 4200 K selected from the APOGEE-2 DR17 database using new observations carried out with the spectrograph mounted on the 1 m telescope of the Hungarian Piszkéstető Observatory and the SONG spectrograph (R = 77,000) on the Hertzsprung SONG telescope in the 4500–5800 Å wavelength range. This is the first time the spectrograph (R = 18,000) on the 1 m telescope at Piszkéstető Observatory was used to measure the abundances of stars. We created a new LTE spectral library using MARCS model atmospheres and SYNSPEC by including the line list of 23 molecules to determine atmospheric parameters (T eff,
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- May 2024
- DOI:
- 10.1088/1538-3873/ad4177
- arXiv:
- arXiv:2404.13176
- Bibcode:
- 2024PASP..136e4202D
- Keywords:
-
- Red giant stars;
- High resolution spectroscopy;
- Ground-based astronomy;
- Chemical abundances;
- 1372;
- 2096;
- 686;
- 224;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Accepted for publication in PASP, 18 pages, 6 figures