“Radiation-lifted torus”

• Predict covering factor
• f(LX, MBH)
• Redshift evolution Buchner+15
• LX/(MBH2/3) rad. pressure Elitzur+15, Wada15
• Opt./SDSS Oh+15
• replace receding torus
• Unphysical for X-rays

“Galaxy gas as obscurer: II.” Buchner & Bauer (2017)