Luminosity function of optically-selected type II QSOs

Details Luminosity function of optically-selected type II QSOs Luminosity function of optically-selected type II QSOs

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010scchg..53s.191b&link_type=abstract

Science China Physics, Mechanics and Astronomy, Volume 53, Issue 1, pp.191-195

Astronomy and Astrophysics

Astronomy

Type Ii Qsos, Luminosity Function, Emission Lines, Balmer Decrements

Scientific paper

For a sample of 411 type II QSOs with redshifts less then 0.3, 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=4.0 corresponds to an extinction of 0.94 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 < 0.3 and 8.6⩽log ( L [O III]/ L &sun;)⩽9.4.

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