The X-ray variability of high-redshift QSOs

J. Manners, O. Almaini, A. Lawrence

Research output: Contribution to journalArticlepeer-review

Abstract

We present an analysis of X-ray variability in a sample of 156 radio-quiet quasars taken from the ROSAT archive, covering a redshift range 0.12) in the sense that QSOs of the same X-ray luminosity are more variable at z>2. We discuss possible explanations for this effect. The simplest explanation may be that high-redshift QSOs are accreting at a larger fraction of the Eddington limit than local AGNs.
Original languageEnglish
Pages (from-to)390-398
JournalMonthly Notices of the Royal Astronomical Society
Volume330
Publication statusPublished - 1 Feb 2002

Keywords

  • GALAXIES: ACTIVE
  • GALAXIES: EVOLUTION
  • GALAXIES: NUCLEI
  • QUASARS: GENERAL
  • X-RAYS: GALAXIES
  • X-RAYS: GENERAL
  • galaxies: active
  • galaxies: evolution
  • galaxies: nuclei
  • quasars: general
  • X-rays: galaxies
  • X-rays: general

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