Tipo de publicación: Con árbitro

  • Publicación
    An effective temperature calibration for solar type stars using equivalent width ratios. A fast and easy spectroscopic temperature estimation
    Aims: Precise determination of the stellar effective temperature of solar type stars is extremely important for astrophysics. We present an effective...
  • Publicación
    An Effective Temperature Scale for Late-M and L Dwarfs, from Resonance Absorption Lines of Cs I and Rb I
    We present Keck HIRES spectra of six late-M dwarfs and 11 L dwarfs. Our goal is to assign effective temperatures to the objects using detailed atmospheric...
  • Publicación
    An Elemental Assay of Very, Extremely, and Ultra-metal-poor Stars
    We present a high-resolution elemental-abundance analysis for a sample of 23 very metal-poor ([Fe/H]
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    An elevation of 0.1 light-seconds for the optical jet base in an accreting Galactic black hole system
    Relativistic plasma jets are observed in many systems that host accreting black holes. According to theory, coiled magnetic fields close to the black hole...
  • Publicación
    An ellipsoidal modulation in Nova Ophiuchi 1977 (=H1705-25=V2107 Oph)
    We report the detection of an orbital, ellipsoidal modulation at a period of 16.8h for V2107 Oph (Nova Ophiuchi 1977, H1705-25), from R-band photometry. From...
  • Publicación
    An ellipsoidal modulation in X-ray Nova VELA 1993 (=GRS 1009-45)
    We present the first optical observations of the soft X-ray transient Nova Vela 1993, taken during quiescence in 1995 and 1996. From the R-band photometry with...
  • Publicación
    An Ellipsoidal Study of Centaurus-X-4
    We present the first infrared ellipsoidal study of a low-mass X-ray binary system, and hence measure the mass of the neutron star. Photometry of Cen X-4...
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    An empirical approach to the location of the theoretical isochrones in the observational plane
    A new empirical calibration of the (B-V) index versus the three fundamental stellar parameters T(eff), (Fe/H), and log g is presented whose range of validity is...
  • Publicación
    An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars
    Infrared observations are used to obtain effective temperatures with a 3-percent error for a sample of low main-sequence stars. The empirical calibration of...