Variable Fe-Kα line profiles in Sy 1 galaxies

Details Variable Fe-Kα line profiles in Sy 1 galaxies Variable Fe-Kα line profiles in Sy 1 galaxies

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..622g&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

Active And Peculiar Galaxies And Related Systems, X-Ray Sources, X-Ray Bursts

Scientific paper

We discuss Fe Kα line profile variability in an ASCA sample of Seyfert 1 galaxies. In particular, we examine the line core energies defined by fitting narrow Gaussians. Such an empirical analysis is simplistic but avoids modeling uncertainties. We find significant Fe flux and/or energy variability in ~60% of the sample on time scales ranging from years to hours. For example, the peak line energy in Mrk 279 changes from 6.3 to 6.5 keV in ~104 s, suggesting an emission region no more than a few light-hours across. .

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