High-Spatial Resolution Imaging and Polarization of AGN

Physics

Scientific paper

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Hst Proposal Id #5746 Quasars &Amp, Agn Seyferts

Scientific paper

After the discovery of significant optical polarization in some Seyfert 2 the study of polarized flux has proved to be a very useful tool for a better understanding of these objects. In particular, spectropolarimetry observations have provided very useful information on the nature of Seyfert 2 galaxies and have revealed in some spectrum broad Balmer lines and a polarized non stellar continuum. The polarized spectrum reproduces the spectrum of a Seyfert 1 galaxy indicating that these Seyfert 2 galaxies contain a hidden Seyfert 1 nucleus; the emission from the nucleus is reflected in our line of sight producing the observed polarization. More recently HST imaging polarimetry has proven to be a unique tool for a better understanding of the hidden radiation source and and its relation with the surrounding medium. For this reason we propose to carry out imaging polarimetry of Seyfert 2 galaxies. In addition we propose to perform new observations of candidates for the continuation of this program. This is a follow to Proposal 3504 for which 7.85 hours have been approved for Cycle 4.

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