TY - JOUR AU - Mitchell Begelman BT - The Astrophysical Journal DA - 06/2006 DO - 10.1086/503093 PY - 2006 SP - 1065 EP - 1080 T2 - The Astrophysical Journal TI - Photon Bubbles and the Vertical Structure of Accretion Disks VL - 643 SN - 0004-637X ER -