Interferometric Astrometry with Hubble Space Telescope Fine Guidance Sensor 3:The Parallax of the Cataclysmic Variable TV Columbae

B. E. McArthur , G. F. Benedict , J. Lee , W. F. van Altena , C. L. Slesnick , J. Rhee , R. J. Patterson , L. W. Fredrick

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W. J. Spiesman E. Nelan R. L. Duncombe P. D. Hemenway W. H. Jefferys P. J. Shelus O. G. Franz L. H. Wasserman

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classification 🌌 astro-ph

keywords distancecataclysmiccolumbaefineguidancehubbleinterferometricmagnitude

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TV Columbae (TV Col) is a 13th magnitude Intermediate Polar (IP) Cataclysmic Variable (CV), with multiple periods found in the light curves. Past estimates predicted a distance of 400 parsec to greater than 500 parsec. Recently completed Hubble Space Telescope (HST) Fine Guidance Sensor (FGS) interferometric observations allow us to determine the first trigonometric parallax to TV Col. This determination puts the distance of TV Col at 368 -15+17 parsecs. CD-32 2376, a 10th magnitude Tycho Catalog star, is a reference star in the TV Col frame. We find a distance of $127.7 -1+1 parsecs.

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Interferometric Astrometry with Hubble Space Telescope Fine Guidance Sensor 3:The Parallax of the Cataclysmic Variable TV Columbae

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