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The Structure and Content of Molecular Clouds 25 Years of Molecular Radioastronomy pp 271–282Cite as

High resolution studies of SiO masers

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Part of the book series: Lecture Notes in Physics ((LNP,volume 439))

Abstract

The discovery of SiO maser emission from Orion and late type stars is briefly reviewed and the main spectroscopic properties of the SiO molecule are given. Several rotational transitions in various vibrational states of 28SiO, 29SiO or 30SiO have been observed in the direction of about 225 evolved stars. The SiO molecule is strongly masing and provides a new tool to explore the dynamics and structure of regions extending from the stellar photosphere to the circumstellar dust shell. In this review we discuss recent observations made with sensitive radio interferometers which provide crucial information on the mechanisms at the origin of the maser phenomenon and on the physical conditions prevailing in the SiO dense clumps above the stellar photosphere. Some SiO maser pumping models including radiation, collisions and line overlaps are briefly discussed.

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Authors and Affiliations

  1. Observatoire de Bordeaux, BP 89, 33270, Floirac, France

    Alain Baudry

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  1. Alain Baudry
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Thomas L. Wilson Kenneth J. Johnston

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© 1990 Springer-Verlag

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Baudry, A. (1990). High resolution studies of SiO masers. In: Wilson, T.L., Johnston, K.J. (eds) The Structure and Content of Molecular Clouds 25 Years of Molecular Radioastronomy. Lecture Notes in Physics, vol 439. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3540586210_21

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  • DOI: https://doi.org/10.1007/3540586210_21

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-58621-0

  • Online ISBN: 978-3-540-49035-7

  • eBook Packages: Springer Book Archive

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