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.
- Galaxies: intergalactic medium
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science