Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.0306p&link_type=abstract
American Astronomical Society Meeting 210, #03.06; Bulletin of the American Astronomical Society, Vol. 39, p.98
Other
Scientific paper
Hipparcos mission measured parallax with claimed measurement error of 1 mas for 120000 targets. Arguments about systematic errors of the Hipparcos parallax have never been stopped. One of the major systematic error sources is the binarity jitter because the Hipparcos parallax is deeply troubled by the binary stars. In this work we demonstrate significant binarity jitters for star HD 48097. Although the Hipparcos has determined its orbit and made correction for fitting of parallax determination, we show that the systematic error in Hipparcos parallax for that target is as big as two and half times than it should be. Our new calculation algorithm use high precision radial velocity measurements combining with Hipparcos intermediate data and obtained new parallax for HD 48097. Our results indicate that the precision of Hipparcos parallax for that target has been improved by the factor of 3. We conclude that it is necessary to dig out systematic errors of Hipparcos parallax by using other high precision techniques, such as long baseline optical/IR interferometers, high accuracy spectrometers, etc.
Makarov Valeri V.
Pan Xiaopei
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