2014 Fall Physics Colloquium Series: Sangwook Park, Ph.D.

DateSeptember 17, 2014Time4:00 - 5:00 pm
LocationBaylor Sciences Building, Room e.125
Description
Sangwook Park, Ph.D.
Assistant Professor, Department of Physics
University of Texas, Arlington

X-Ray Study of Supernova Remnants: New Insights for Type Ia Explosions and Progenitors

Supernova remnants are an excellent laboratory to study many fundamental subjects of modern astronomy and astrophysics such as the nature of stellar evolution, explosion, interstellar chemical/density structures, and cosmic-ray acceleration. With the emergence of modern X-ray observatories supernova remnant study has been revolutionized for the last decade. We briefly introduce recent results from deep X-ray observations of Type Ia supernova remnants, Kepler and G299.2-2.9. We detect Fe-peak ejecta elements Mn, Cr, Fe, and Ni in Kepler. Our estimated mass ratios among these elements show that Kepler’s supernova was a thermonuclear explosion of a relatively young white dwarf with a super-solar metallicity. G299.2-2.9 shows a significantly elongated emission feature from a strong outflow-like metal-rich stellar debris gas. This particular emission feature may suggest an asymmetric explosion or a significantly modified environment, unlike the traditional picture of Type Ia supernova.

For more information, please contact: Dr. Anzhong Wang 254-710-2276

PublisherDepartment of Physics
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