Evidence for a Magnetically Driven Disk Wind in the Black Hole GRO J1655-40

Details Evidence for a Magnetically Driven Disk Wind in the Black Hole GRO J1655-40 Evidence for a Magnetically Driven Disk Wind in the Black Hole GRO J1655-40

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0802m&link_type=abstract

American Astronomical Society, HEAD meeting #9, #8.02; Bulletin of the American Astronomical Society, Vol. 38, p.361

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Scientific paper

We recently observed the Galactic black hole GRO J1655-40 in outburst on two occasions, using Chandra and RXTE. The Chandra/HETG spectra reveal over 90 absorption lines. The lines are blue-shifted, consistent with absorption in an accretion disk wind. A number of simple constraints, as well as photoionization modeling, suggest that radiative and thermal processes are unlikly to drive the wind. Rather, the observed wind is broadly consistent with magnetically-driven winds predicted in MRI disk simulations, and may also be consistent with Blandford-Payne magnetocentrifugal winds. These findings will be presented within the context of disk-driven outflows in other Galactic compact objects and AGN.

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