The Metagalactic Ionizing Radiation Field at Low Redshift
The Astronomical Journal1999Vol. 118(4), pp. 1450–1460
Citations Over TimeTop 10% of 1999 papers
Abstract
We compute the ionizing radiation eld at low redshift, arising from Seyferts, QSOs, and starburst galaxies. This calculation combines recent Seyfert luminosity functions, extrapolated ultraviolet uxes from our IUE-AGN database, and a new intergalactic opacity model based on Hubble Space T elescope and Keck Lya absorber surveys. At z \ 0 for AGNs only, our best estimate for the specic intensity at 1 ryd is ergs cm~2 s~1 Hz~1 sr~1 , independent of and ". The one-sided
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