Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-08-16
Astronomy and Astrophysics
Astrophysics
to appear in the proceedings of "Symbiotic stars probing stellar evolution", R.L.M. Corradi, J. Mikolajewska, T.J. Mahoney eds
Scientific paper
High resolution (R~20,000), high signal-to-noise (S/N~100) spectra were collected for ~40 symbiotic stars with the Asiago echelle spectrograph over the same 8480-8740 Ang wavelength range covered by the ESA Cornerstone mission GAIA, centered on the near-IR CaII triplet and the head of the Paschen series. A large number (~140) of cool MKK giant and supergiant templates were observed with the same instrumentation to serve as a reference and classification grid. The spectra offer bright prospects in classifying and addressing the nature of the cool component of symbiotic stars (deriving T(eff), log g, [Fe/H], [alpha/Fe], V(rot)sin i both via MDM-like methods and syntetic atmosphere modeling) and mapping the physical condition and kinematics of the gas regions responsible for the emission lines.
Marrese Paola M.
Munari Ulisse
Sordo Rosanna
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