Molecular sphere around cool stars - a view unveiled by ISO

Details Molecular sphere around cool stars - a view unveiled by ISO Molecular sphere around cool stars - a view unveiled by ISO

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001asthe..94..204t&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 94, No. 5, p. 204 - 213 (2001)

Astronomy and Astrophysics

Astronomy

Cool Stars, Circumstellar Molecules

Scientific paper

ISO revealed that water is found not only by absorption but also by emission in the early M supergiant star μ Cep. More generally, water is found through early to late M (super)giants. These results reveal the presence of huge warm molecular spheres (MOLsphere) around red (super)giant stars. Although stellar photosphere could be modeled rather easily, infrared spectra observed by ISO could not be accounted for at all by the model photospheres. What ISO unveiled is that we are far from unified understanding of the stellar atmosphere, which consists not only of the photosphere but also of the MOLsphere, chromosphere, and expanding gas-dust envelope.

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