Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.5603g&link_type=abstract
American Astronomical Society Meeting 207, #56.03; Bulletin of the American Astronomical Society, Vol. 37, p.1240
Astronomy and Astrophysics
Astronomy
Scientific paper
We present over a decade of spectroscopic monitoring of broad Hα emission lines in a sample of broad-line radio galaxies that demonstrate extremely broad, double-peaked line profiles that are well modeled by emission from photoionized gas in a relativistic accretion disk around a central black hole. We use the slow, systematic variability of the shape of the broad Hα lines to extract information about the structure and dynamics of the broad-line gas. We successfully rule out many alternative "non-accretion disk" models for the source of the double-peaked line emission, and test the robustness of the accretion disk model, and models for dynamical processes in the accretion disk, by directly comparing the observed profile variability with model predictions.
Eracleous Michael
Filippenko Alexei V.
Gezari Suvi
Halpern Jules P.
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