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Model Atmospheres of AGB Stars: Dynamics, Molecules and Dust

Loidl, Rita; Höfner, Susanne; Jφrgensen, Uffe G.

The atmospheres and circumstellar envelopes of AGB stars are characterized by complex physical phenomena like shock waves caused by stellar pulsation or formation of molecules and dust which often lead to a heavy mass loss and have a strong influence on IR properties as observed by ISO. To allow a physical interpretation of various observations we…

Molecules in Stellar Atmospheres

Gustafsson, B.

The effects of molecules on model stellar atmospheres are briefly reviewed. Molecular diagnostics of stellar fundamental parameters and of atmospheric structure are discussed, and the presently emerging "ISO picture" of the outer regions of stars is commented upon.

Dust Around Solar Mass Stars

Chary, R.; Zuckerman, B.; Becklin, E. E. +4 more

The DEBRIS project is a search for infrared excess around Sun-like main sequence stars, and other types of stellar targets, using the Infrared Space Observatory. Some results, calibration issues, and changes to our original program are presented. Future platforms for advancing this project after the conclusion of the ISO mission are indicated.

Dust Disks around Main Sequence Stars

Stencel, R. E.; Backman, D. E.; Fajardo-Acosta, S. B. +1 more

Many nearby main sequence stars are surrounded by cool dust radiating strongly in the far-IR. The characteristics of some of the prototype systems will be discussed. The dust is understood to represent debris related to planet formation, and the known disk systems may be dense analogs of the Kuiper Belt structure in our outer solar system. ISO obs…

Ionized Outflows of Hot Stars

Waters, L. B. F. M.; Hillier, D. J.; Morris, P. W. +4 more

ISO-SWS Observations of Planetary Nebulae with [WR] Central Stars

Szczerba, R.; Tylenda, R.; Górny, S. K.

Synthetic Spectra for Carbon Stars from Dynamica Model Atmospheres

Aringer, Bernhard; Loidl, Rita; Hron, Josef +2 more

Spectroscopy and Spectral Energy Distribution of the Peculiar Supergiant IRAS 04296+3429

Szczerba, R.; Klochkova, V. G.; Panchuk, V. E.

ISO Observations of Symbiotic Stars

Clavel, J.; Metcalfe, L.; Schulz, B. +8 more

A number of symbiotic stars have been observed with ISO. In addition to a number of emission lines, SWS observations of the symbiotic novae RR Tel and V1016 Cyg reveal prominent, broad 10 & 18 µm silicate dust features. The 10 µm features are similar to the crystalline silicate profiles seen in classical novae. There is some evidence that the …

Chemical Abundances of Planetary Nebulae: A UV to Far-IR Case Study of NGC 6153

Liu, X. -W.