The dark side of accretion: chasing type 2 QSOs

Details The dark side of accretion: chasing type 2 QSOs The dark side of accretion: chasing type 2 QSOs

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2039f&link_type=abstract

Chandra Proposal ID #07900290

Physics

Chandra Proposal Id #07900290

Scientific paper

One of the major results of Chandra and XMM surveys is that a population of highly obscured, Seyfert like AGN at 0.5-1, dominates the accretion powered luminosity density, calling for a revision of AGN Unified Schemes. Alternatively, luminous QSOs may follow a different formation and evolution pattern than Seyferts. Thus also the build up and evolution of the obscuring gas could be drammatically different. While we have a relatively good knowledge of the obscuration properties of Seyfert like AGN, little is still known about obscuration in powerful QSOs at high-z. The goal of this proposal is to nearly double the number of confirmed type 2 QSOs by accurately locate with Chandra ~30 XMM ELAIS-S1 sources with high X-ray to optical flux ratio (and therefore good type 2 QSO candidates).

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