Search Publications

ISO's View on Massive Star Evolution: Neon Abundances in Wolf-Rayet Stars

Willis, A. J.; Morris, P. W.; van der Hucht, K. A. +1 more

Investigation of the Small-Scale Temperature and Density Fluctuations in Planetary Nebulae through the Use of the ISO Data

Kholtygin, A. F.

The problem of the ne and Te fluctuations in the planetary nebulae (PN) in a view of the ISO data was investigated. The fluxes in the OIII fine structure (FS) lines for a large sample of PNe were estimated.

ISOPHOT Mapping Observations of a Mira-Type AGB Star R Hya

Izumiura, H.; Hashimoto, O.

Far-infrared mapping observations of a Mira-type AGB star R Hya were carried out with the imaging photo-polarimeter ISOPHOT.

Dust Formation and Mass Loss in Evolved Stars

Winters, Jan Martin

The problem of dust formation in the circumstellar envelopes of Asymptotic Giant Branch stars is addressed. We summarize the basic thermodynamic prerequisites necessary to enable the formation and growth of solid particles from the gas phase and draw some conclusions on the evolution of the emergent dust component. In a circumstellar environment t…

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.