Biasses in the estimation of the UV background strength.
Abstract
The author has examined the possibility that current estimates of measuring the strength of the UV background by means of the so-called "inverse" or "proximity" effect may be in error to various systematic biasses. He concludes that the largest source of uncertainty in current estimates comes from the lack of knowledge of the systemic velocity of the host QSOs. Bases on current estimates of the mean blueshift of the emission lines of Lyα 1216 Å and CIV 1549 Å observed in samples of luminous QSOs the author concludes that current data is consistent with QSOs accounting for at least 25% of the background intensity. It is possible that QSOs may account for the whole of the UV background if current models of QSO evolution and revised intergalactic opacities are used.
- Publication:
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Extragalactic Background Radiation Meeting
- Pub Date:
- February 1995
- Bibcode:
- 1995ebr..proc..269E
- Keywords:
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- UV Background: Quasars