Astrofísicas: Estrellas F

  • Publicación
    Chromospheric modelling in late-type dwarfs. II - CES observations of active and quiescent stars

    The characteristics of the chromospheres of late-type dwarf stars were studied using the CoudeEchelle Spectrograph (CES) at ESO and the IUE. The study focused...

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    Detection of acoustic oscillations in the F2 V star HD 155543

    Results are presented on an analysis of rapid photometric data of the F2 V star HD 155543, obtained simultaneously from the Observatorio del Teide (Spain) and...

  • Publicación
    Determination of bolometric fluxes for F, G and K subdwarfs

    Bolometric fluxes for 118 dwarfs and subdwarfs with 4000K less than Teff less than 7000K and +0.5 less than (Fe/H) less than -3.5 are derived by integrating...

  • Publicación
    Determination of temperatures and angular diameters of 114 F-M stars using the infrared flux method (IRFM)

    Temperatures and angular diameters are derived for 114 F-M stars using the infrared flux (IRFM) method and initially both the Vega flux calibrations of Dreiling...

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    Investigating magnetic activity of F stars with the Kepler mission

    The dynamo process is believed to drive the magnetic activity of stars like the Sun that have an outer convection zone. Large spectroscopic surveys showed that...

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    IUE MG II doublet observations in F and G main sequence stars

    Mg II resonance lines at 2800 A were studied in the spectra of F and G main sequence stars, observed with the IUE satellite in high resolution mode. Correlation...

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    Li depletion in F stars by internal gravity waves

    It is argued that internal gravity waves generated by the convective envelope of a star may be effective in producing a weak mixing in its radiative interior...

  • Publicación
    Lithium and rotation in the Hyades late F and G stars

    Selecting stars with previously measured or estimated rotational periods we have measured equivalent widths of the Li doublet (6708 A) in 8 stars of the Hyades...

  • Publicación
    Metallicity effects on the T(eff) scale for main sequence stars

    Relations are presently established among T(eff), colors, and metallicity for a sample of Population I and II F and G main-sequence stars whose physical...