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Diffuse Ionized Gas in the β CMa Tunnel

Published online by Cambridge University Press:  12 April 2016

Olivier Dupin  and
Cécile Gry
Olivier Dupin
Affiliation:
Laboratoire d’Astronomie Spatiale, CNRS, BP 8, F-13376 Marseille Cedex 12, France
Cécile Gry
Affiliation:
Laboratoire d’Astronomie Spatiale, CNRS, BP 8, F-13376 Marseille Cedex 12, France ISO Science Operation Center, PO Box 50727, E-28080 Madrid, Spain

Abstract

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We present HST observations of the interstellar medium toward the star β CMa known to be located in a low density extension of the Local Bubble. Most of the matter in the sight-line is ionized and clumped in two main components. One of them, as well as one of the components detected toward ϵ CMa, is mostly ionized and only slightly depleted. Their ionization ratios are compatible with collisional ionization at T~25 000 K. These clouds could have been ionized by shocks related to the Local Bubble creation and also responsible of some dust grain sputtering.

Type
Part IV Clouds, Ionized Gas, and Particles in the Local ISM
Information
International Astronomical Union Colloquium , Volume 166: The Local Bubble and Beyond , 1997 , pp. 173 - 176
Copyright
Copyright © Springer-Verlag 1998

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