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| Paper: |
Determination of the Stellar Parameters of C-rich Hydrostatic Stars from Spectro-Interferometric Observations |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
101 |
| Authors: |
Paladini, C.; van Belle, G. T.; Aringer, B.; Hron, J.; Reegen, P.; Lebzelter, T.; Davies, C. |
| Abstract: |
In this contribution we present the results of our recent
investigation on the main characteristics and global structure
of five mildly pulsating C-rich AGB stars. Infrared spectroscopy
(UKIRT/UIST) in the wavelength range between 0.9 and
4 μm and K-band infrared interferometric data (Palomar Testbed
Interferometer) were collected for our sample of objects. The
observations are compared with a recent large grid of hydrostatic
model atmospheres. After the identification of the main absorption
features (CO, C2, HCN, C2H2, CN), we confine the
temperature and C/O ratio of the objects with spectroscopic
observations. Since low-resolution spectroscopy is not sensitive
to changes in mass and log g, we determine these quantities
with interferometric observations. Finally, the fundamental
parameters obtained for the set of stars are compared with
evolutionary tracks of thermally pulsing AGB stars. |
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