UConn Physics Colloquium

New Source of X-ray Emission in the Solar System and Beyond

Dr. Vasili Kharchenko
Harvard-Smithsonian Center for Astrophysics

New mechanism of X-ray and Extreme Ultraviolet (EUV) emission induced in collisions between the solar wind ions and neutral gas is discussed. The interaction between the Solar Wind and neutral interstellar, planetary, and cometary gases is reviewed. EUV and X-ray emission spectra of cascading photons, produced in the charge-exchange collisions of heavy solar wind ions are constructed and compared with the results of laboratory measurements and astrophysical observations. Results of modeling of X-ray emissions from the interstellar gas and planetary and cometary atmospheres are presented and compared with observational data from the X-ray and EUV satellite telescopes: ROSAT, Chandra, XMM-Newton, EUVE, and CHIPS. Source of the charge-exchange emission induced by stellar winds are analyzed.

Friday, January 20, 2006
4:00 pm
Room P-36

(We will meet for refreshments prior to the talk at 3:30 p.m., in the Gant Science Complex, Physics Library, Room P-103.)

© 2006 Department of Physics, University of Connecticut
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