Extended Emission and Accretion Rates in BL Lacertae Objects

Physics

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Chandra Proposal Id #05700663

Scientific paper

We propose X-ray imaging observations of 6 higher-redshift BL Lacs, to study the gaseous environment around the nucleus. The sample extends our AO1 sample to higher luminosities, to probe the circumnuclear environs as a function of core power and distance. The science goals of the proposed investigation are: 1) confirm the presence of diffuse hot halos around the cores of BL Lacs, testing unification models which unify these sources with FRI galaxies; 2) determine the role of the external gas for confining the jet; and 3) estimate the nuclear accretion rate (via Bondi theory) as a function of different BL Lac subclasses, to test the origin of the blazar luminosity spectral sequence.

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