Hunting for Intrinsically X-ray Weak Quasars: The Case of PHL 1811 Analogs

Details Hunting for Intrinsically X-ray Weak Quasars: The Case of PHL 1811 Analogs Hunting for Intrinsically X-ray Weak Quasars: The Case of PHL 1811 Analogs

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2870b&link_type=abstract

Chandra proposal ID #11700262

Astronomy and Astrophysics

Astronomy

Scientific paper

A central dogma of X-ray astronomy is that luminous X-ray emission is a universal property of efficiently accreting supermassive black holes. One interesting challenge to this idea has come from the quasar PHL 1811 which appears to be intrinsically X-ray weak and also has distinctive emission-line properties. We propose to observe a sample of eight SDSS quasars, selected to have similar UV emission-line properties to that of PHL 1811, to test if they are also X-ray weak. Our analyses of the currently available X-ray data appear to support this hypothesis but do not provide a proper test. Our results will have implications for the nature of accretion-disk coronae, emission-line formation, and AGN selection.

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