The Visual Orbit of the Chromospherically Active Spectroscopic Binary Star HR 8170

Details The Visual Orbit of the Chromospherically Active Spectroscopic Binary Star HR 8170 The Visual Orbit of the Chromospherically Active Spectroscopic Binary Star HR 8170

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19513205k&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #132.05; Bulletin of the American Astronomical Society, Vol. 32, p.879

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the visual orbit of the chromospherically-active spectroscopic binary star HR 8170. The orbit was determined by fitting visibility amplitude measurements made in the K (2.2 micron) photometric band using the Palomar Testbed Interferometer. Only a single instrument baseline was used, but adequate coverage in the (u,v) plane was provided by a combination of the binary's orbital motion and Earth rotation. The projected separation of the binary is found to be only 2 milliarcsec, so the system is only marginally resolved compared to the 4 milliarcsec fringe spacing of the instrument. Nevertheless, the new data provide a useful and nearly-independent test of the previous spectroscopically-determined orbit.

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