Cornell University

Cornell Department of Astronomy & Space Sciences Fall 2022 Colloquium Series

Thursday, September 1, 2022 at 3:30pm to 4:30pm

Space Sciences Building, 105

"Shock acceleration in the inhomogeneous interstellar medium"



With the development of multi-messenger astronomy and the detection of astrophysical neutrinos, we are in a golden age of new cosmic ray (CR) measurements and studies.

Supernova remnants are believed as the leading candidate for the source of Galactic CRs. Recent observations, however, challenge the well-developed theory of diffusive shock acceleration of CRs in supernova remnants. I will reexamine the assumptions in the standard shock acceleration model and discuss the key missing physics for shocks propagating in the turbulent and inhomogeneous interstellar medium. A more realistic shock acceleration model holds the promise to understand the observational puzzles and the origin of Galactic CRs.

Dial-In Information

To view via Zoom, please contact Monica Carpenter ( or Jason Jennings ( for the link.

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Contact E-Mail

Contact Name

Monica Carpenter

Contact Phone



Siyao Xu

Speaker Affiliation

Institute for Advanced Study

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