Spectropolarimetric test of the relativistic disk model for the broad emission lines of active galactic nuclei

Details Spectropolarimetric test of the relativistic disk model for the broad emission lines of active galactic nuclei Spectropolarimetric test of the relativistic disk model for the broad emission lines of active galactic nuclei

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354l...1c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 354, May 1, 1990, p. L1-L4. Research supported by NASA.

Other

14

Accretion Disks, Active Galactic Nuclei, Astronomical Models, Emission Spectra, Line Spectra, Polarimetry, Radio Galaxies, Attitude (Inclination), Broadband, Electron Scattering, Polarization Characteristics, Relativistic Effects

Scientific paper

Previously, it was claimed that the broad emission lines of the radio galaxy Arp 102B can be fitted by the line profile from a simple relativistic Keplerian thin disk. It was argued that the lines originating from the relativistic accretion disk could be polarized due to electron scattering, which is likely to be the dominant opacity in the line-emitting region of Arp 102B. In the present work, the expected polarization properties of these broad emission lines are calculated. The percentage of polarization depends strongly on the inclination angle. For some angles, the red peak of the polarized, double-peaked line profile can be higher than the blue peak. This is in contrast to the total line profile, in which the blue peak is always higher than the red one. Spectropolarimetric observations could, therefore, provide an independent test of the relativistic disk model for the broad emission lines of Arp 102B and other active galactic nuclei.

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