Physics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10351f&link_type=abstract
HST Proposal ID #10351
Physics
Hst Proposal Id #10351
Scientific paper
We propose to measure the proper motions in the X-ray source associtasted with the HH 154 jet.This is the only known protostellar jet, where the X-ray enmission can be studied in detail. Our numericval simulations show that the X-ray source is produced in a fast-moving post-shock region {500 km/s}, and earlier HST observations {1996, 1998} together with ground based spectra identifythe potential region from which the X-rays should emanate. Detection {or lack of} the X-rays with Chandra, and the associated optical region with HST will either strongly confirm {or falsify} our model. This will constitute the basis for a general theory for the formation of X-rays in protostellar jets. Understanding and modellling the emission mechanism of X-rays is key to estimate the lifetime and evolution of the X-ray jets and understand their influence on the star {and planetary-} formation process in general. Associating the right optical material {HST} with the X-ray source {Chandra} provides both proper motions {and true speeds}, as well as {by observing in H-alpha and [SII]} determining the {post-} shock properties in the recombination region.
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