A ∼10 Mpc void in the Lyα forest at z = 3.17

Adam Dobrzycki, Jill Bechtold

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


The spectrum of the z = 3.285 quasar, Q0302-003, shows a large (∼10 Mpc) void in the Lyα forest at z ≈ 3.17. By simulating the absorption spectrum of the quasar with a range of Lyα forest cloud parameters, we find that the probability of such a void occurring by chance is ∼2 × 10-4. Since the void is near (although not centered on) the redshift of a bright foreground quasar, we discuss the possibility that the void results from ionization of the clouds by the EUV radiation of this QSO.

Original languageEnglish (US)
Pages (from-to)L69-L72
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - Aug 20 1991


  • Cosmology
  • Galaxies: intergalactic medium
  • Quasars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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