Physics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sgrb.confe..31k&link_type=abstract
Presented at the KITP Conference: Supernova and Gamma-Ray Burst Remnants, Feb 10, 2006, Kavli Institute for Theoretical Physics,
Physics
Scientific paper
The interaction of the expanding shock from a supernova explosion with thesurrounding environment is a powerful source of radiation in variousspectral bands at different stages in the development of the supernovaremnant. Studying the X-rays generated by such objects is therefore likelyto reveal details of these on going interactions. For example, the X-rayemission from the relatively old supernova remnant PKS1209-52 is highlyasymmetric - 75% of the total emission arises from the eastern side of theshock. We describe a possible model that can explain this extra emissionfrom the eastern lobe of the remnant as resulting from a recent encounterbetween the shock front and a small, dense, interstellar cloud. Theparticular mechanism is a plasma streaming instability known as themodified two-stream instability. The presence of the cloud makes itpossible to extract some of the kinetic energy of the shock wave andconvert this into X-ray emission via high-energy electrons generated fromlower hybrid waves in the plasma interaction region. We have carried out2-D fluid simulation of the interaction which agrees very well with theobserved geometry of the source. Finally, the neutron star remnant of theoriginal supernova explosion is seen to generate cyclotron absorptionfeatures in its X-ray emission spectrum that reveal the detailed dynamicsof the magnetic field of the neutron star itself. Planned laboratoryexperiments to study the results will be outlined.
Bingham Richard
Bryans Paul
Kellett Barry J.
Shapiro Vadim
Spicer Ds
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