Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chfe.sympe..11s&link_type=abstract
Chandra Fellows Symposium 2001, held 15 October, 2001 at Harvard-Smithsonian Center for Astrophysics, meeting abstract.
Astronomy and Astrophysics
Astrophysics
Scientific paper
High resolution soft X-ray spectra of Seyfert galaxies obtained with the grating spectrometers onboard Chandra and XMM-Newton are providing us with a detailed view of the circumnuclear regions surrounding the supermassive black hole. In Seyfert 1 galaxies, where the central continuum radiation source is viewed directly, accurate velocity and column density measurements of the outflowing gas along the line of sight are now possible, thereby allowing us to infer the properties of the intrinsic radiation spectrum produced in the vicinity of the black hole. The X-ray spectra of Seyfert 2 galaxies, on the other hand, are dominated by discrete line emission, presumably formed in the same outflowing gas that imprints absorption features in Seyfert 1 spectra. I will show some recent results obtained with Chandra and XMM-Newton, and discuss a few examples where the newly acquired X-ray spectra are challenging our conventional understanding of the physical conditions in these systems.
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