Poster Title: Measuring Black Hole Masses in Double Peaked Broad Lined AGN
Abstract: To date there have been few black hole (BH) mass estimates for luminous broad line AGN, including those derived from reverberation mapping. In this context, objects with "double-peaked" broad lines are particularly important because the line emission is believed to arise in a relativistically rotating accretion disk. If this model is correct, then the BH mass can be determined directly from periodic variations in the line-profile shape. In two cases (Arp 102B and NGC 1097) such variations have been claimed. We describe the first result from a HST STIS long-slit spectroscopy mapping of the velocity field of circum-nuclear ionized gas for 5 of the nearest and brightest "double-peaked emitters" (NGC 1097, Arp 102B, Pictor A, 3C390.3, 3C332), designed to set independent limits on the central masses of the systems .
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