The Reflection-Dominated X-Ray Spectrum of NGC6552

Details The Reflection-Dominated X-Ray Spectrum of NGC6552 The Reflection-Dominated X-Ray Spectrum of NGC6552

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.268l..55r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 268, NO. 3/JUN1, P. L55, 1994

Astronomy and Astrophysics

Astronomy

54

Scientific paper

A serendipitous observation of the Seyfert 2 galaxy NGC 6552 by the ASCA Gas Imaging Spectrometer shows this object to have a remarkable X-ray spectrum. It displays a strong Kα line of neutral iron, in addition to low-energy structure. Here we present a model in which reflection from neutral matter dominates the X-ray spectrum. The model includes fluorescence of C, O, Ne, Mg, Si, S, Ar, Ca, Cr, Fe and NI. A good fit is obtained by assuming that the reflector is of cosmic abundance in these elements; the data require that the iron abundance be within a factor of 2 of the cosmic value. The reflector orientation and the possibility of constraining abundances further are discussed. The implication of such reflection-dominated sources for the X-ray background is also discussed.

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