Hubble Space Telescope Fine Guidance Sensor Astrometric Parallaxes for Three Dwarf Novae: Ss Aurigae, Ss Cygni, and U Geminorum
نویسندگان
چکیده
We report astrometric parallaxes for three well-known dwarf novae obtained using the Fine Guidance Sensors on the Hubble Space Telescope (HST). We found a parallax for SS Aurigae of mas, for p 5 5.00 5 0.64 SS Cygni we found mas, and for U Geminorum we obtained mas. These p 5 6.02 5 0.46 p 5 10.37 5 0.50 represent the first true trigonometric parallaxes of any dwarf novae. We briefly compare these results with previous distance estimates. This program demonstrates that with a very modest amount of HST observing time, the Fine Guidance Sensors can deliver parallaxes with sub-milliarcsecond precision. Subject headings: astrometry — novae, cataclysmic variables — stars: individual (SS Aurigae, U Geminorum, SS Cygni)
منابع مشابه
Hst Fine Guidance Sensor Astrometric Parallaxes for Three Dwarf Novae: Ss Aurigae, Ss Cygni, and U Geminorum
We report astrometric parallaxes for three well known dwarf novae obtained using the Fine Guidance Sensors on the Hubble Space Telescope. We found a parallax for SS Aurigae of π = 5.00 ± 0.64 mas, for SS Cygni we found π = 6.02 ± 0.46 mas, and for U Geminorum we obtained π = 10.37 ± 0.50 mas. These represent the first true trigonometric parallaxes of any dwarf novae. We briefly compare these re...
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