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000002374 005__ 20160701171704.0
000002374 037__ $$aASTROimport-531
000002374 100__ $$aHalbwachs, J.-L.
000002374 245__ $$aA Statistical Study of the Visual Double Stars in the TYCHO Catalogue
000002374 260__ $$c1997
000002374 520__ $$aThe Tycho Catalogue contains reliable (B_T, V_T) photometry for double star components with separations above a limit of about 3 arcsec. These data are used to investigate the distribution of mass ratios of main sequence binaries. For that purpose, two other points are treated first: the correction of Tycho photometry for contamination by neighbour stars, and the derivation of the colour-magnitude diagram in the Tycho photometric system. It appears that the main sequence in the (V_(T abs), B_T - V_T) diagram derived from the Tycho double stars is nearly similar to that obtain from the calibrations selected by Schmidt-Kaler (1982). The distribution of mass ratios, as derived from the mass-luminosity relation, has a rough IMF-like shape with an exponent of about -2. 
000002374 700__ $$a Piquard, S.
000002374 700__ $$a Virelizier, P.
000002374 700__ $$a Cuypers, J.
000002374 700__ $$a Lampens, P.
000002374 700__ $$a Oblak, E.
000002374 773__ $$c263-268$$pHipparcos - Venice '97$$v402$$y1997
000002374 85642 $$ahttp://esoads.eso.org/abs/1997ESASP.402..263H
000002374 905__ $$apublished in
000002374 980__ $$aNONREF