Shock Acceleration Efficiency in Kepler's Supernova Remnant

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

Fast shock waves like those in young supernova remnants put some fraction of their energy into fast particles, and another fraction into magnetic field. These fractions are not well determined typically, because synchrotron emission from relativistic electrons depends on roughly the product of the two, while the shock energy density depends on gas density and shock speed. Shock speeds can be difficult to determine from thermal X-ray spectra, as electrons and ions may have different temperatures, and significant energy may be lost to the fast particles. Most importantly, accurate thermal-gas densities are often unknown, or only roughly known from X-ray emission measures. All these quantities may vary at different locations in a supernova remnant. We present new determinations of gas densities at various points around the periphery of Kepler's supernova remnant, from modeling Spitzer IRS spectra from shock-heated dust. In combination with shock velocities from proper motions, radio brightnesses, and magnetic-field determinations from X-ray synchrotron morphology, we can then estimate the fractions of shock energy in relativistic electrons and in magnetic field, at different points around the remnant periphery. Furthermore, X-ray synchrotron emission visible around much of the periphery allows the determination of maximum electron energies. We present spatially resolved estimates of these quantities and discuss their significance for theoretical models of shock acceleration.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Shock Acceleration Efficiency in Kepler's Supernova Remnant does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Shock Acceleration Efficiency in Kepler's Supernova Remnant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shock Acceleration Efficiency in Kepler's Supernova Remnant will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1578257

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.