Comments on the nature of the Lyman edge from thin accretion disks

Details Comments on the nature of the Lyman edge from thin accretion disks Comments on the nature of the Lyman edge from thin accretion disks

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..155l&link_type=abstract

In: Testing the AGN paradigm; Proceedings of the 2nd Annual Topical Astrophysics Conference, Univ. of Maryland, College Park, Oc

Astronomy and Astrophysics

Astrophysics

15

Accretion Disks, Active Galactic Nuclei, Continuous Radiation, Local Thermodynamic Equilibrium, Lyman Spectra, Ultraviolet Emission, Electron Scattering, Optical Thickness, Relativistic Effects, Thermal Emission

Scientific paper

The detection of an intrinsic Lyman edge in the continuum emission of AGN can serve as an important evidence for the thermal nature of the UV emission. Non LTE and electron scattering effects can significantly decrease the amplitude of the edge. These effects, combined with strong relativistic effects, expected if the emission originates from a thin accretion disk, can make it hard to detect the edge in existing data. High S/N observations over a large wavelength range are required in order to put interesting constraints on the presence of a thin disk edge, in particular, and on the thermal nature of the UV emission in general.

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