Kepler's Supernova Remnant: an Imaging Study of the Blast Wave - Circumstellar Medium Interaction

Details Kepler's Supernova Remnant: an Imaging Study of the Blast Wave - Circumstellar Medium Interaction Kepler's Supernova Remnant: an Imaging Study of the Blast Wave - Circumstellar Medium Interaction

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9731s&link_type=abstract

HST Proposal ID #9731

Physics

Hst Proposal Id #9731 Ism And Circumstellar Matter

Scientific paper

Kepler's SNR {SN 1604 AD} is the prime example of a young Galactic SNR where the blast wave is running into the wind of the progenitor star. The interaction between the blast wave and the inhomogeneous circumstellar medium gives rise to knots, evolving on a time scale of years, that dominate the optical emission from the remnant. Also visible in the optical are fainter Balmer line filaments that exhibit a range of geometries - from normal sheet-like filaments to more diffuse clumps of emission, the latter unique to this remnant. We propose to image Kepler's SNR through several narrowband filters using ACS/WFC and WFPC2. The morphology and ionization structure of the knots will be obtained from H-alpha, [S II], and [O III] images. We will also obtain a [N II] image, which is known to be strong and spatially variable in the remnant. The proposed H-alpha images will be deep enough so that the physical scales and structure of the Balmer dominated non-radiative shocks can be investigated. Our data will be a critical part of multiwavelength studies of Kepler's SNR. They will complement Chandra and XMM X-ray data and VLA radio data, and provide a significant advance in understanding the processes of magnetic field amplification and cosmic ray acceleration in SNRs as well as the evolution and dynamics of the blast wave - circumstellar medium interaction.

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