A First Close Look at the Balmer-edge Behavior of the Quasar Big Blue Bump
arXiv:astro-ph/0212259 · doi:10.1046/j.1365-8711.2003.06934.x
Abstract
We have found for the first time a Balmer edge feature in the Big Blue Bump emission of a quasar. The feature is seen in the polarized flux spectrum of the quasar, where all the emissions from outside the nucleus are scraped off and removed. The existence of the Balmer-edge absorption feature directly indicates that the Big Blue Bump is indeed thermal and optically-thick.
2 pages, 2 figures. To be published in conference proceedings "Active Galactic Nuclei: from Central Engine to Host Galaxy"