NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-19 T12:35:25 PDT
Help | Comment | NED Home

For refcode 2004A&A...415...39D:
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2004A&A...415...39D Investigating the central engine of Seyfert 2 galaxies with and without Polarized Broad Lines S. J. Deluit Received 28 April 2003 / Accepted 9 October 2003 We study the hard X-ray emission of two samples of Seyfert 2 galaxies with and without Polarized Broad Lines (PBL). In the hard X-ray domain, absorption effects do not significantly modify the intrinsic emission allowing us a direct access to the central engine. The purpose of this study is to compare the primary emission of the two Seyfert 2 subclasses in order to investigate the nature of their central engine and to test unified models according to which they both have a hidden Seyfert 1 nucleus. We compute the average hard X-ray spectra of Seyfert 2 galaxies with and without PBL observed with BeppoSAX/PDS (15-136 keV). The two spectra have a common general behavior at first sight, but investigating deeper we find differences in the intrinsic properties of the two categories of Seyfert 2 galaxies. Sy2 with polarized broad lines have physical conditions close to those of Sy1 galaxies whereas Sy2 without PBL differ substantially, suggesting that they may have a particular place in the scheme of Seyfert galaxies. Keywords: galaxies: active, galaxies: nuclei, galaxies: Seyfert, X-rays: galaxies, methods: data analysis
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home