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Observational Evidence on the Interaction of Orion Population Stars and the Interstellar Medium

Published online by Cambridge University Press:  12 April 2016

G. Grasdalen*
Affiliation:
Department of Physics, University of Wyoming

Extract

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The Orion population stars are those stars which have only recently formed. It is generally accepted that these stars arose as condensations in the interstellar medium. It follows that they should show strong interactions with that material. In only one case, the nebula near T Tauri (Schwartz 1974) do we have any direct evidence for the interaction between these stars and the interstellar medium. Presumably this is because the typical interactions take place on much larger or much shorter distance scales. The long range interaction of young stars with their environment is discussed in Section II.

It is also generally agreed that Orion population stars are still enshrouded in circumstellar material. There are important questions that have yet to be answered about that material before we can begin to discuss the details of any interaction between these stars and their surroundings. These difficulties are discussed in Section III.

Finally, I have chosen four topics to discuss in somewhat more detail. My aim has been either to urge caution in accepting current interpretations or to put caution aside and suggest new possibilities.

Type
Part I: Young Objects
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

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