UK Physics & Astronomy Physics & Astronomy
Colloquium


Colloquium



3:30 PM, Friday, March 8, 2002


Room 155, Chem-Phys Building







Dr. Eric D. Feigelson


Penn State University





X-rays, young stars and the origin of our solar system





Stars and planets form at low temperatures from molecular clouds in the Galaxy. But X-ray and radio astronomical studies show that young stars have greatly elevated levels of high energy phenomena - multimillion degree plasma and MeV particles - compared to older stars like our Sun today. This paradox, including recent findings from NASA's Chandra X-ray Observatory, is presented and understood in terms of violent flares in magnetic fields generated in young stars. It may also help resolve the long-standing mystery concerning the high abundances of radioactive isotopes in ancient meteorites.



*** Refreshments served at 3:15 PM ***


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Send comments to
Moshe Elitzur
moshe@pa.uky.edu



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On 11 Feb 2002, 17:10.