Physics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..125s&link_type=abstract
XMM-Newton Proposal ID #02023703
Physics
Coalsack Halo, Coalsack Background, Coalsack Nebula, Xmm-Newton Proposal 02023703
Scientific paper
We propose to observe a probable hot plasma/cold cloud X-ray emitting interface region surrounding the Coalsack Nebula. Such an interface will provide a nearly unique insight into the physical parameters of transition regions, which are a feature of models of the interstellar medium but are not observed (except in active SNR shock fronts). The motivation for the observation is three-fold, to verify the existence of the X-ray bright transition region as observed with in ROSAT data, determine the origin of the X-ray emitting plasma, and determine the physical state of the plasma. Specifically, to answer the question whether the interface region between the cloud and the surrounding hot gas is experiencing evaporation, condensation, or turbulent mixing.
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