The ionized intergalactic gas: baryonic dark matter

A. Zurita*, M. Rozas, J. E. Beckman, S. Ryder

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We use Hα measurements of complete sets of H II regions in disc galaxies to compute the fraction of ionizing photons which escape from them using the hypothesis of density bounding. The escaping flux is more than enough to ionize the observed diffuse ionized gas (DIG) and the balance implies that an important fraction of the flux escapes into the intergalactic medium (IGM).

Original languageEnglish
Pages (from-to)499
Number of pages1
JournalAstrophysics and Space Science
Issue numberSuppl. 1
Publication statusPublished - 1 Dec 2001
Externally publishedYes


  • Galaxies:spiral
  • H II regions
  • IGM
  • ISM


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