Authors: WeiHao Bian ShiYan Zhang
Publish Date: 2010/05/20
Volume: 53, Issue: 1, Pages: 191-195
Abstract
For a sample of 411 type II QSOs with redshifts less then 03 we use the Balmer decrements to do the reddening correction of the O III luminosities and then derive the intrinsic O III luminosity function We find that the host reddening correction of the O III 5007 luminosity for type II QSOs cannot be neglected The median Balmer decrement of Hα/Hβ=40 corresponds to an extinction of 094 mag for the O III 5007 line which is consistent with the result derived from the median Hβ/Hγ Comparing the intrinsic luminosity function of type II QSOs with that of type I QSOs we find that the upper limit of the type II QSO’s fraction in the total QSOs is 80 for type II QSOs with z 03 and 86⩽log L O III/L ⊙⩽94
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