Comparison of Observed and Synthetic Spectra of AGB-Stars: A Progress Report
- Author(s)
- Stefan Uttenthaler, Bernhard Aringer, Michael Gorfer, Josef Hron, Hans Ulrich Käufl, Thomas Lebzelter
- Abstract
We have calculated a set of synthetic spectra for AGB-stars using the MARCS-code (Gustafsson et al., 1975) and improved spectral synthesis. Here we investigate the spectral changes as a function of the stellar parameters and we show a comparison of observed high resolution UVES spectra of galactic disk and bulge AGB-stars with calculated synthetic spectra. Using our set of synthetic spectra, we try to determine the stellar parameters using only these and (J - K) data (Schultheis 1998). To achieve this, we use a minimal-distance method and search for spectral features which can be used as indicators that are sensitive either only to a change in Teff or only to a change in metallicity [M/H] (where M are all metals from Li to U). In a later stage of the project, we will focus on selected lines of s-process elements in an attempt to achieve a more accurate abundance determination leading to a better understanding of nucleosynthesis and dredge-up processes in these stars.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- European Southern Observatory (Germany)
- Pages
- 497-499
- No. of pages
- 3
- DOI
- https://doi.org/10.1017/S1743921305006332
- Publication date
- 2005
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/fab0a199-e9f4-4968-a450-b48749aaffa1