3D Kinematic Reconstruction of Cas A's High-Velocity Ejecta Jets

Details 3D Kinematic Reconstruction of Cas A's High-Velocity Ejecta Jets 3D Kinematic Reconstruction of Cas A's High-Velocity Ejecta Jets

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943916m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #439.16

Astronomy and Astrophysics

Astronomy

Scientific paper

A three-dimensional kinematic reconstruction of the optical emission from the Galactic supernova remnant Cassiopeia A (Cas A) encompassing both the main shell and the NE and SW streams of high-velocity ejecta (aka 'jets') is presented. The 3D map has been created from radial velocities and relative emission line strengths extracted from over 10,000 spectra covering the wavelength region 4000-8000 Angstroms. Also presented are 2010 HST/WFC3 observations obtained with the F098M filter sensitive to [S III] 9069, 9531 and [S II] 10287-10370 emissions that reveal the extent of ejecta in never-seen-before depth. These observations permit investigation of the jets' nature and relation to the remnant's overall dynamics, which in turn can be used to draw inferences about how the original explosion took place. This new 3D reconnaissance of Cas A's highest velocity ejecta may serve as a useful guide for multi-dimensional CCSN models that incorporate explosion asymmetries and bipolar jets.

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