High resolution UV imaging of the binary nucleus of Abell 35

Details High resolution UV imaging of the binary nucleus of Abell 35 High resolution UV imaging of the binary nucleus of Abell 35

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8282d&link_type=abstract

HST Proposal ID #8282

Computer Science

Hst Proposal Id #8282 Binary Stars

Scientific paper

We propose to obtain two high resolution UV images of the extra-ordinary binary central star of the Planetary Nebula Abell 35 using WFPC2. This system consists of a rapidly rotating G8III-IV star which dominates the optical light, and a PG1159-type white dwarf that dominates the UV flux. It is a challenging test of binary star evolution theories because the interaction between the binary components is apparent in the high rotation of the companion. However, the orbital parameters of the system remain poorly constrained. Our aim is to obtain high resolution UV images of the system with a view to spatially resolving the binary. We already have data indicating a projected separation in the range 0.08-0.14^ without achieving a clear separation of the two stars. The requested observations will improve on this to give direct and more precise measurements of the orbital separation and position angle. These snapshot images will provide first epoch data for the definition of the binary orbit of the central star of Abell 35.

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