Physics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7525e&link_type=abstract
HST Proposal ID #7525
Physics
Hst Proposal Id #7525 Binary Stars
Scientific paper
Symbiotic stars provide an important laboratory for the study of the structure and photoionization processes in red giant winds. RR-TEL is one of the brightest and the best studied of these systems and has provided a testing ground for both ideas of symbiotics, and also for emission line physics and atomic data. We propose to study the emission line gas of RR-TEL by using archival spectra taken with the HRS in conjunction with existing far-UV {FUV} obtained with the Orfeus and Astro-2 space missions. Our goal is to develop line diagnostics, and to apply them to the study of RR-TEL. Observation of the UV emission lines at high resolution with the HRS provides a means to separate out the properties of the nebular gas surrounding the system, and emission features attributable to the shocked region where the winds from the hot and cool stars interact. These provide a point of comparison with X-ray determinations of the shock strength and also with theoretical models. HRS data taken to date has shown the power of high resolution studies in deciphering the multiple component nature of the emission line regions. The diagnostics we develop in this work can also be applied to future STIS observations.
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