Revealing AGN by Polarimetry

Details Revealing AGN by Polarimetry Revealing AGN by Polarimetry

2004-08-05

arxiv.org/abs/astro-ph/0408106v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures; contributed talk to be published in the proceedings of the conference "Astronomical Polarimetry - Current

Scientific paper

Polarimetric study in the UV and optical has been one of the keys to reveal the structure and nature of active galactic nuclei (AGN). Combined with the HST's high spatial resolution, it has directly confirmed the predicted scattering geometry of ~100 pc scale and accurately located the hidden nuclear position in some nearby active galaxies. Recently, we are using optical spectropolarimetry to reveal the nature of the accretion flow in the central engine of quasars. This is to use polarized light to de-contaminate the spectrum and investigate the Balmer edge spectral feature, which is otherwise buried under the strong emission from the outer region surrounding the central engine.

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