Outflows from X-Ray Pulsars in the Propeller State

Details Outflows from X-Ray Pulsars in the Propeller State Outflows from X-Ray Pulsars in the Propeller State

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..812c&link_type=abstract

Chandra Proposal ID #03400623

Physics

Chandra Proposal Id #03400623

Scientific paper

As an accreting X-ray pulsar enters the propeller state, the accreted matter encounters a centrifugal barrier and thus cannot follow the field lines to reach the magnetic poles. Consequently, the X-ray pulsation ceases. It is thought that in this state the accreted material is actually ejected and thus forms an outflow. Indirect evidence for such an outflow exists for GX 1+4, based on the non-thermal nature of its observed X-ray spectrum in the propeller state. Now the powerful combination of the HETG and ACIS allows, for the first time, an attempt to studying gas dynamics in X-ray pulsars during this poorly understood state, by measuring Doppler-shifted iron fluorescent lines. We propose a joint Chandra and RXTE ToO campaign to observe GX 1+4 in the propeller state.

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