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Mid-IR Imaging of AGB Stars and Circumstellar Modelling

Published online by Cambridge University Press:  12 April 2016

M. Busso ,
L. Origlia ,
G. Silvestro ,
M. Marengo ,
P. Persi  and
M. Ferrari-Toniolo
M. Busso
Affiliation:
Osservatorio Astronomico di Torino, Pino Torinese, Italy
L. Origlia
Affiliation:
Osservatorio Astronomico di Torino, Pino Torinese, Italy
G. Silvestro
Affiliation:
Istituto di Fisica Generate dell’Università, Torino, Italy
M. Marengo
Affiliation:
Istituto di Fisica Generate dell’Università, Torino, Italy
P. Persi
Affiliation:
Istituto di Astrofisica Spaziale del CNR, Frascati, Italy
M. Ferrari-Toniolo
Affiliation:
Istituto di Astrofisica Spaziale del CNR, Frascati, Italy

Extract

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The evolution of low and intermediate mass (1-8 M⊙) stars along the Asymptotic Giant Branch (AGB) is ruled by processes of mass loss, causing the whole convective envelope to be gradually ejected into space. If the stellar mass is sufficiently high (M ≥ 1.5 M⊙) the envelope itself becomes enriched in nucleosynthesis products (carbon and s-process nuclei) and the star evolves into a C-rich phase. AGB stars are hence surrounded by O-rich or C-rich envelopes, opaque at optical wavelengths, which are best studied through direct imaging in the infrared (IR).

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 429 - 430
Copyright
Copyright © Astronomical Society of the Pacific 1995

References

Loup, C., Forveille, T., Omont, A., & Paul, J.,F. 1993, A&AS, 99, 291 Google Scholar