Binary star orbits from speckle interferometry. I - The Hyades binary Finsen 342 (70 Tauri)

Details Binary star orbits from speckle interferometry. I - The Hyades binary Finsen 342 (70 Tauri) Binary star orbits from speckle interferometry. I - The Hyades binary Finsen 342 (70 Tauri)

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1431m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Oct. 1988, p. 1431-1438. Research supported by the Space Telescope Science Insti

Astronomy and Astrophysics

Astronomy

20

Binary Stars, Eccentric Orbits, Speckle Interferometry, Stellar Magnitude, Stellar Orbits, Taurus Constellation, Lunar Occultation, Stellar Mass

Scientific paper

The conclusion of Peterson and Solensky (1987) that the motion of the Hyades binary Finsen 342 is best represented by a 6 yr eccentric orbit rather than by a 13 yr circular orbit assumed in most previous analyses is tested. Through the digital processing of four sets of speckle observations obtained between 1975 and 1986 to unambiguously determine the quadrant of the secondary star at those epochs, it is shown conclusively that the orbit is indeed the short-period one, with a period of 6.264 yr. A new orbital solution, based solely upon speckle coverage of two revolutions, is shown to give an overall better fit to all the available visual, occultation, and interferometric data than any previously determined orbit for Fin 342, even though visual and occultation observations are excluded from the orbital solution. An initial estimate of the magnitude difference is determined from the speckle observations.

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