Molecular and Dust Features in mass-losing AGB Stars, Models and ISO-Observations

Autor(en)

Bernhard Aringer, Franz Kerschbaum, Susanne Höfner, Uffe Grae Jorgensen, R. Loidl, W Windsteig

Abstrakt

Until recently, synthetic spectra for AGB stars have usually been calculated by using hydrostatic model atmospheres like the MARCS code. This is problematical, since AGB stars are dominated by dynamical phenomena like pulsation, shock waves, dust formation, and heavy mass loss. As a consequence, classical hydrostatic models fail to reproduce the observed intensities and variations of molecular features. To address these problems, we have computed synthetic spectra based on dynamical atmospheres from Höfner et al. (1998; these proceedings) by calculating chemical abundances of molecular species, continuum absorption, and molecular opacities for a given temperature-pressure structure (COMA code). For carbon stars we can also include dust opacities. The results are then taken as input for a radiative transfer code.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Uppsala University

Seiten

307

Publikationsdatum

1998

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/molecular-and-dust-features-in-masslosing-agb-stars-models-and-isoobservations(696ad198-55cc-4d53-a5cb-b565a958af8b).html