Astrophysical: Main sequence stars

  • Publication
    Infrared photometry of upper main sequence stars in M39
    Infrared photometry of 19 Main sequence stars in the open cluster M39 is presented. Infrared-infrared and optical-infrared color-color and color-magnitude...
  • Publication
    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...
  • Publication
    Lithium abundances and metallicities in stars near the main-sequence turnoff and a giant in M67
    The iron abundance of seven stars near the main-sequence (MS) turnoff and a giant in M67 are spectroscopically derived, and the results are discussed. The...
  • Publication
    Long-term starspot activity of short-period RS Canum Venaticorum stars. III - BH Virginis
    The photometric distortion waves in the light curves of the short-period RS CVn system BH Vir by a dark, circular spot model for the active regions on the...
  • Publication
    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...
  • Publication
    New windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de La Laguna, Spain, July 3-8, 1989. Part 1
    Papers are presented on stellar structure and evolution. Particular attention is given to the deep CCD photometry of stars in the globular cluster M3; dynamical...
  • Publication
    On the shell spectrum of 48 Librae
    Spectrograms of the variable star 48 Librae, taken near the last expected minimum, have been examined for irregularities of the shell line profiles. The...
  • Publication
    Oxygen abundances in F-type stars of the Hyades and the Ursa Major group
    We have derived the oxygen abundances of 50 F-type main-sequence stars, belonging to the Hyades open cluster, the Ursa Major group, and the field, using an NLTE...
  • Publication
    Rapid photometry of the Delta Scuti variable 63 Herculis and of the F 2V star HD 155543 - Observations and analysis of the time series
    In this paper we report the results of simultaneous observations, using rapid continuous differential photometry, of the δ Scuti star 63 Her and of a normal...