The Geometric Structure of Symbiotic Stars Eg Andromedae and Ax Persei

Computer Science

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Scientific paper

Our objective is to refine the current models for the geometric structure and the extent of ionized and nebular material in symbiotic stars. We will focus on obtaining UV spectra at critical phases for the symbiotic stars EG Andromedae and AX Persei, which are believed to be binary stars. Low dispersion SWP and LWR spectra of AX Per are needed to complete the monitoring of a single orbital cycle which was begun in the sixth year of IUE. In addition, we propose to obtain a deep (roughly 6 hours) high dispersion SWP exposure of EG And at quadrature and one of AX Per during ingress. The high dispersion spectra of these stars will be used to study the interaction features such as streams, accretion disks and winds from either the cool and/or hot components. The mass ratio of the components of EG And will be estimated by comparison with two previous high dispersion images.

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