Distance Of Atlas From Combination Of Hipparcos And<br />Interferometer Observations

Details Distance Of Atlas From Combination Of Hipparcos And<br />Interferometer Observations Distance Of Atlas From Combination Of Hipparcos And<br />Interferometer Observations

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.4804p&link_type=abstract

American Astronomical Society Meeting 208, #48.04; Bulletin of the American Astronomical Society, Vol. 38, p.123

Astronomy and Astrophysics

Astrophysics

Scientific paper

The distance to the Pleiades cluster plays vital role in astronomical distance ladders. In particular, the distance of second brightest star in the Pleiades, Atlas, has been measured by many different techniques, such as photographic technique, RV measurements, lunar occultation, Hipparcos, Interferometers.The first space-based astrometric project, Hipparcos, provides accurate parallax for hundred ten thousand stars. The precision of parallax from Hipparcos, however, are troubled by binarity of stars. Since optical/IR long baseline interferometers, such as the Mark III interferometers on Mt. Wilson and the PTI interferometer on Palomar, can measure close binary stars with accuracy of sub-milliarcsecond, it is a good idea to re-calculate Hipparcos results by applying orbital corrections from long baseline interferometers.We use both astrometric and photometric parameters from interferometry to the intermediate measurements of the Hipparcos. The procedures of recalculations of Hipparcos measurements are presented. Astrophysical impacts of new results are investigated. General suggestions to use Hipparcos data are discussed.

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