Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..629g&link_type=abstract
Highlights of Astronomy, Volume 14 IAU XXVI General Assembly, 14-25 August 2006 Karel A. van der Hucht, ed., p.629
Astronomy and Astrophysics
Astronomy
Scientific paper
The origin of the soft X-ray emission in obscured Active Galactic Nuclei (AGN) is still largely unknown, despite important progress made possible by recent measurements with Chandra and XMM-Newton. Our understanding of the evolution of accretion onto supermassive black holes, and of its interaction with gas andstars in the dense nuclear environment would receive a dramatic burst by thesolution of this mystery. In this paper, we will: (a) show why high-resolution X-ray spectroscopy is crucial to the solution of this issue; (b) present CIELO, the first catalogue of soft X-ray emission lines in obscured AGN ( 80 sources), built from observations of the Reflection Grating Spectrometer (rgs) on-board XMM-Newton; and (c) discuss the implementation of the IVOA Line Data Model in VO tools (such as the SED builder VOSpec), and its application to CIELO. The combination of the unprecedented RGS sensitivity in the soft X-ray regime, and of the VO protocol power leads us to be closer than ever to unveiling the nature of soft X-ray emission in obscured AGN.
Bianchi Simone
Guainazzi Matteo
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