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SiO maser emission in oxygen AGB stars

Published online by Cambridge University Press:  01 March 2007

R. Soria-Ruiz ,
F. Colomer ,
J. Alcolea ,
V. Bujarrabal  and
J.-F. Desmurs
R. Soria-Ruiz
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands email: soria@jive.nl
F. Colomer
Affiliation:
Observatorio Astronómico Nacional, Apartado 112, E-28803, Alcalá de Henares, Spain
J. Alcolea
Affiliation:
Observatorio Astronómico Nacional, Alfonso XII 3, E-28014, Madrid, SpainAcademic Street, Camford, CF3 5QL, UK
V. Bujarrabal
Affiliation:
Observatorio Astronómico Nacional, Apartado 112, E-28803, Alcalá de Henares, Spain
J.-F. Desmurs
Affiliation:
Observatorio Astronómico Nacional, Alfonso XII 3, E-28014, Madrid, SpainAcademic Street, Camford, CF3 5QL, UK
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Abstract

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We present high resolution observations of SiO masers in the late-type star R Cas as part of a multi-line study of SiO circumstellar masers in oxygen-rich AGB stars. We used the NRAO Very Long Baseline Array (VLBA) to map the 43 GHz maser emission of 28SiO. We study the relative spatial distribution of the different maser lines and discuss the relevance of line overlaps in the SiO pumping theory.

Keywords

technique: interferometricstars: circumstellar matterstars: AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 332 - 333
Copyright
Copyright © International Astronomical Union 2008

References

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