Narrow-Line Seyfert 1 Galaxies with high-energy sharp spectral drops: reflection-versus absorption models

Details Narrow-Line Seyfert 1 Galaxies with high-energy sharp spectral drops: reflection-versus absorption models Narrow-Line Seyfert 1 Galaxies with high-energy sharp spectral drops: reflection-versus absorption models

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006an....327.1071b&link_type=abstract

Astronomische Nachrichten, Vol.327, Issue 10, p.1071

Astronomy and Astrophysics

Astronomy

3

X-Rays: Galaxies, Galaxies: Active, Galaxies: Seyfert

Scientific paper

With the launch of XMM-Newton in 1999, two Narrow-Line Seyfert 1 Galaxies (NLS1s) have been detected (IRAS 13224-3809 and 1H 0707-495) showing sharp spectral drops at energies equal or above the neutral Fe K edge at 7.1 keV without any narrow Fe K reemission. In this paper I summarize our present knowledge on the observed properties of sharp high-energy spectral drops. I list the problems presently arising from the reflection dominated and the optically thick disc models. Finally, I present an alternative solution which consists of a combination of the accretion disc model and the reflection dominated model. This might solve the problems of the standard accretion disc model.

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