Effective temperature scale and bolometric corrections from 2MASS photometry
We present a method to determine effective temperatures, angularsemi-diameters and bolometric corrections for population I and II FGKtype stars based on V and 2MASS IR photometry. Accurate calibration isaccomplished by using a sample of solar analogues, whose averagetemperature is assumed to be equal to the solar effective temperature of5777 K. By taking into account all possible sources of error we estimateassociated uncertainties to better than 1% in effective temperature andin the range 1.0-2.5% in angular semi-diameter for unreddened stars.Comparison of our new temperatures with other determinations extractedfrom the literature indicates, in general, remarkably good agreement.These results suggest that the effective temperaure scale of FGK starsis currently established with an accuracy better than 0.5%-1%. Theapplication of the method to a sample of 10 999 dwarfs in the Hipparcoscatalogue allows us to define temperature and bolometric correction (Kband) calibrations as a function of (V-K), [m/H] and log g. Bolometriccorrections in the V and K bands as a function of T_eff, [m/H] and log gare also given. We provide effective temperatures, angularsemi-diameters, radii and bolometric corrections in the V and K bandsfor the 10 999 FGK stars in our sample with the correspondinguncertainties.
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Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm
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Proper motion study of the globular cluster M 3
We present proper motions for stars in the field of the galacticglobular cluster NGC 5272 (M 3). This study forms part of the Bonnprogramme of globular cluster proper motions. 14 plates were taken withthe Bonn double refractor, spanning epoch differences of up to 85 years.Relative proper motions for all well-measurable stars in the 1.5deg x1.5deg field covered by the plates were derived. Typical proper motionerrors are 0.5-1.2 milliarcsec/year. The cluster membership of UV-brightand variable stars is discussed. The proper motions are compared withthe accurate relative proper motions of Cudworth (1979) and with theabsolute proper motions from Schmidt plates referred to galaxies ofScholz et al. (1993). The latter comparison enables us to tie the propermotions of the stars and the mean proper motion of M 3 to an inertialsystem. The absolute proper motions of Hipparcos stars in the field willbe useful for an extragalactic calibration of the Hipparcos propermotion system. The data for the 791 stars is available via the CDS(Centre des Donnees Astronomiques Strasbourg) Data Centre.
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Early type high-velocity stars in the solar neighborhood. IV - Four-color and H-beta photometry
Results are presented from photometric obaservations in the Stromgrenuvby four-color and H-beta systems of early-type high-velocity stars inthe solar neighborhood. Several types of photometrically peculiar starsare selected on the basis of their Stromgren indices and areprovisionally identified as peculiar A stars, field horizontal-branchstars, metal-poor stars near the Population II and old-disk turnoffs,metal-poor blue stragglers, or metallic-line A stars. Numerousphotometrically normal stars were also found.
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Further Studies of A-Stars and F-Stars in the Region of the North Galactic Pole - Part Four - a Catalogue of Uvbyr Photometry and Derived Quantities
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Further Studies of A-Stars and F-Stars in the Region of the North Galactic Pole - Part Three - a Catalogue of Star Names and Positions
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Über die Veränderlichkeit der Sterne des Spektraltyps A
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Der kugelfoermige Sternhaufen Messier 3
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Comparison between the distribution of energy in the spectrum of the integrated light of the globular cluster Messier 3 and of neighboring stars.
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