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Paper: |
HST Expansion Parallaxes of Binary Miras |
Volume: |
318, Spectroscopically and Spatially Resolving the Components of Close Binary Stars |
Page: |
374 |
Authors: |
Munari, U.; Corradi, R.L.M.; Whitelock, P.A. |
Abstract: |
The circumstellar material in the binary and symbiotic Mira He 2-147 takes the form of a well formed torus, while that in He 2-104 appears as two nested hourglasses. Their velocity patterns are well mapped by ground-based spectroscopic observations. We are observing both systems with HST in the [NII] 6584 Å light to obtain first and second epoch high resolution images, from which we will measure the angular expansion and then the distance by comparison with spectroscopic expansion velocities. |
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