========================================================================== V/58 [Fe/H], Vel, Orbits of F2-K5 Dwarfs 80pc from Sun (Marsakov+ 1988) The following files can be converted to FITS (extension .fit .fgz or .fiZ) catalog.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=V/58 ==========================================================================
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Beginning of ReadMe : V/58 [Fe/H], Vel, Orbits of F2-K5 Dwarfs 80pc from Sun (Marsakov+ 1988) ================================================================================ The Catalogue of Metallicities, Velocity Components and Orbital Parameters for F2-K5 Dwarfs in the Vicinity of 80 pc from the Sun Marsakov V.A., Shevelev Yu.G. <CDS Inf. Bull., 35, 129 (1988)> =1988BICDS..35..129M ================================================================================ ADC_Keywords: Abundances, [Fe/H] ; Space velocities ; Stars, late-type Description: In this catalog, metallicities, distances, components of space velocities and parameters of osculating orbits are calculated for 1065 F2-K5 dwarfs with UBV photometric data, proper motions and radial velocities. The present sample is composed on the base of the Ochsenbein (1980) catalogue and contains the stars of the V (IV-V) luminosity class, within the colour range 0.35<B-V<1.10 (which corresponds to the spectral class range F2-K5). Sandage's (1969) Hyades sequence was used to determine the value delta (U-B) for each star. The authors calibrated the ultraviolet excess in terms of [Fe/H] separately for the four of the temperature index (B-V) where delta(U-B) practically does not depend on the effective temperature. Intervals in (B-V) correspond to the following division on spectral class intervals: F2-F9, G0-G4, and G5-G9, K0-K5. Metallicity is calculated from the formulae: [Fe/H]=-5.3*delta(U-B)+0.02 for stars F2-F9 [Fe/H]=-5.1*delta(U-B)+0.13 for stars G0-G4 [Fe/H]=-5.4*delta(U-B)+0.02 for stars G5-G9 [Fe/H]=-4.7*delta(U-B)-0.04 for stars K0-K5 These relations follow from the assumption that mean metallicity and metallicity dispersion for stars of all spectral classes are the same. Distances to the stars were calculated from spectral parallaxes. Absolute magnitudes (M(V)) were obtained from the Sp,M(V)-relation for dwarfs (Straizys, 1982). The sample includes only stars nearer than 80 pc because reddening is negligible for them. The obtained distances together with radial velocities and proper motions are used to calculate the components of space velocities. The eccentricities, apogalactic and perigalactic distances of the stars were calculated from the osculating orbit approximation according to the galaxy model from the paper by Eggen et al. (1962).