Luminosity dependence in the ratio of X-ray to infrared emission of QSOs

Research output: Contribution to journalArticle (Academic Journal)peer-review


The correlation of X-ray and near-infrared luminosity is studied for a sample of radio-quiet QSOs. The X-ray to infrared ratio is found to decrease as the infrared luminosity increases. No preference is found between the correlations of X-ray luminosity with optical or infrared luminosity. This implies that optical and infrared emission are equally good predictors of X-ray emission. Source models which directly link infrared and X-ray emission are discussed, and a preference is found for a specific synchrotron self-Compton model. This model predicts the correct luminosity dependence of the X-ray to infrared ratio if certain conditions apply.
Original languageEnglish
Pages (from-to)188-195
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 1 Jul 1987


  • Infrared Spectra
  • Luminosity
  • Quasars
  • X Ray Spectra
  • Astronomical Models
  • Compton Effect
  • Near Infrared Radiation
  • Synchrotron Radiation
  • Visible Spectrum


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