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Preliminary results on SiO v=3 J=1−0 maser emission from AGB stars

Published online by Cambridge University Press:  24 July 2012

J.-F. Desmurs ,
V. Bujarrabal ,
M. Lindqvist ,
J. Alcolea ,
R. Soria-Ruiz  and
P. Bergman
J.-F. Desmurs
Affiliation:
Observatorio Astronómico Nacional, Madrid, Spain. email: [desmurs@oan.es, bujarrabal@oan.es, alcolea@oan.es, r.soria@oan.es
V. Bujarrabal
Affiliation:
Observatorio Astronómico Nacional, Madrid, Spain. email: [desmurs@oan.es, bujarrabal@oan.es, alcolea@oan.es, r.soria@oan.es
M. Lindqvist
Affiliation:
Onsala Space Observatory, Chalmers Univ. of Technology, Sweden email: [michael.lindqvist@chalmers.se, pbergman@chalmers.se]
J. Alcolea
Affiliation:
Observatorio Astronómico Nacional, Madrid, Spain. email: [desmurs@oan.es, bujarrabal@oan.es, alcolea@oan.es, r.soria@oan.es
R. Soria-Ruiz
Affiliation:
Observatorio Astronómico Nacional, Madrid, Spain. email: [desmurs@oan.es, bujarrabal@oan.es, alcolea@oan.es, r.soria@oan.es
P. Bergman
Affiliation:
Onsala Space Observatory, Chalmers Univ. of Technology, Sweden email: [michael.lindqvist@chalmers.se, pbergman@chalmers.se]
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Abstract

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We present the results of SiO maser observations at 43 GHz toward two AGB stars using the VLBA. Our preliminary results on the relative positions of the different J=1–0 SiO masers (v=1,2 and 3) indicate that the current ideas on SiO maser pumping could be wrong at some fundamental level. A deep revision of the SiO pumping models could be necessary.

Keywords

MaserAGB stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 252 - 253
Copyright
Copyright © International Astronomical Union 2012

References

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