Tipo de publicación: Con árbitro

  • Publicación
    The emission line-radio correlation for radio sources using the 7C Redshift Survey
    We have used narrow emission-line data from the new 7C Redshift Survey to investigate correlations between the narrow-line luminosities and the radio properties...
  • Publicación
    The emission-line knot in the Seyfert 2 galaxy NGC 5347
    We report on narrow-band Hα imaging and long-slit spectroscopy at intermediate resolution from [NeV] lambda3425A to [SIII] lambda9532A at PA=25.˚5 through the...
  • Publicación
    The empirical metallicity dependence of the mass-loss rate of O- and early B-type stars
    We present a comprehensive study of the observational dependence of the mass-loss rate in stationary stellar winds of hot massive stars on the metal content of...
  • Publicación
    The empirical scale of temperatures of the low main sequence (F0V-K5V).
    We have calibrated the effective temperatures of the low main sequence stars ranging spectral types from F0 to K5 versus [Fe/H] and colours (B-V), (R-I), (V-R)...
  • Publicación
    The energy of waves in the photosphere and lower chromosphere. I. Velocity statistics
    Context: Acoustic waves are one of the primary suspects besides magnetic fields for the chromospheric heating process to temperatures above radiative...
  • Publicación
    The energy of waves in the photosphere and lower chromosphere. II. Intensity statistics
    Context. The energy source powering the solar chromosphere is still undetermined, but leaves its traces in observed intensities. Aims: We investigate the...
  • Publicación
    The energy of waves in the photosphere and lower chromosphere. III. Inversion setup for Ca II H spectra in local thermal equilibrium
    Context. The Ca II H line is one of the strongest lines in the solar spectrum, and it provides continuous information on the solar atmosphere from the...
  • Publicación
    The energy of waves in the photosphere and lower chromosphere. IV. Inversion results of Ca II H spectra
    Context. Most semi-empirical static one-dimensional (1D) models of the solar atmosphere in the magnetically quiet Sun (QS) predict an increase in temperature at...
  • Publicación
    The energy-dependent temporal variation of the ROSAT PSPC gain.
    The existence of systematic spectral-fit residuals in ROSAT PSPC spectra, and their dependence on time, is by now a well established fact. This paper describes...