Resolving Relativistic Effects and the Accretion Flow Geometry of a Black Hole in Outburst

Physics

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Chandra Proposal Id #05400500

Scientific paper

We propose to study the accretion flow geometry of a Galactic black hole in outburst using the Chandra HETGS. Models for the accretion flow geometry in Galactic black holes make different predictions which can be tested with high resolution spectroscopy. We will build on the recent successes of this program -- including the detection of broad Fe K lines likely shaped by Doppler shifts and strong gravity, and narrow absorption lines in an outflowing disk atmosphere -- by obtaining spectra with improved sensitivity. We request a total of 200 ksec (4 obs. of 50 ksec; 1 ``fast'' TOO and 3 follow-ups) for this Chandra study. We will support these observations with simultaneous RXTE and Integral observations, and with radio, IR, and optical observations from approved programs around the globe.

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