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Paper: Interferometric Astrometry of the pre-Cataclysmic Binary Feige 24 Using Hubble Space Telescope Fine Guidance Sensor 3: a Parallax
Volume: 194, Working on the Fringe: Optical and IR Interferometry from Ground and Space
Page: 38
Authors: Benedict, G. F.; McArthur, B. E.; Franz, O. G.; Wasserman, L. H.; Nelan, E. P.; Fredrick, L. W.; van Altena, W. F.; Lee, J.; Jefferys, W. H.; Shelus, P. J.; Hemenway, P. D.; Duncombe, R. L.; Story, D. B.; Whipple, A. L.
Abstract: We present a recent result from a working space-based interferometer, Fine Guidance Sensor 3 on Hubble Space Telescope. With this device we have determined a parallax for the white dwarf - M dwarf interacting binary, Feige 24. Our distance, with better than 10% precision, improves by a factor of three that determined by HIPPARCOS. The more precise distance will assist in constraining models of an astrophysically interesting, interacting binary (P = 4.2 days). It will allow a better determination of the physical properties of this particular hot DA white dwarf.
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