Resolving the Low/hard State of Cygnus X-1 with Chandra

Details Resolving the Low/hard State of Cygnus X-1 with Chandra Resolving the Low/hard State of Cygnus X-1 with Chandra

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1183l&link_type=abstract

Chandra Proposal ID #04400676

Computer Science

Chandra Proposal Id #04400676

Scientific paper

Galactic black holes with relativistic radio jets are called microquasars. These systems are seen at high inclination, partially obscuring their central accretion engine. Cygnus X-1 is seen relatively face-on; it might be regarded as a micro-Seyfert-1, and this may explain why a broad Fe K-alpha emission line consistent with emission from the inner disk is often observed in this source. We request a 60 ksec HETGS observation of Cygnus X-1 in the low/hard state to diagnose its accretion flow geometry in this state through precise Fe K alpha line spectroscopy. We will examine the nature of the companion wind via highly ionized absorption lines, to constrain its role in feeding the central engine. We will make simultaneous RXTE (2-250 keV) and Integral (3 keV - 10 MeV) observations.

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