Lyman edges - Signatures of accretion disks

Details Lyman edges - Signatures of accretion disks Lyman edges - Signatures of accretion disks

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..139k&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

8

Accretion Disks, Lyman Spectra, Quasars, Spectral Signatures, Ultraviolet Emission, Ultraviolet Spectra, Astronomical Models, Optical Thickness, Red Shift, Spectral Line Width

Scientific paper

Accretion disks are thought to provide the ultraviolet emission seen in the big blue bump of quasars. However, observations of the UV spectra of quasars do not show the additional signatures predicted by the accretion disk models. This paper will concentrate on just one of those signatures - the Lyman edge. Two studies are briefly discussed which explore the Lyman edge region of both high and low redshift quasars (Antonucci, Kinney, and Ford 1989 and Koratkar, Kinney, and Bohlin 1992). Both studies find that Lyman edges are not present in quasar spectra as frequently as predicted by the models or at the strength predicted by accretion disk models.

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