Publication type: Refereed

  • Publication
    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)...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    The enigma of Gaia18cjb: A possible rare hybrid of FUor and EXor properties
    Context. Gaia18cjb is one of the Gaia-alerted eruptive young star candidates that has been experiencing a slow and strong brightening during the last 13 years...
  • Publication
    The enrichment history of cosmic metals
    We use a suite of cosmological, hydrodynamical simulations to investigate the chemical enrichment history of the Universe. Specifically, we trace the origin of...
  • Publication
    The entropy of galaxy spectra: how much information is encoded?
    The inverse problem of extracting the stellar population content of galaxy spectra is analysed here from a basic standpoint based on information theory. By...