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Kurzbeschreibung
Mitschnitt einer Veranstaltung am Donnerstag, dem 24. Juni 2010 im Victor-Franz-Hess-Hörsaal der Fakultät für Physik der Universität Wien
Moderation: Walter Kutschera (Universität Wien)
Roland Diehl ist Professor am Max Planck-Institut für extraterrestrische Physik in Garching.
Abstract: Fusion reactions in stars and in supernova-explosions are responsible for the great variety of chemical elements in our universe. In these processes admixtures of unstable nuclei are produced as well. Their decay in the interstellar medium leads to the emission of characteristic lines with energies typical for gamma-ray emission. In this way, space born telescopes are able to observe cosmic nucleosynthesis. Since 2002 the ESA mission INTEGRAL provides data from different regions in our Milky Way. In particular, long-lived radionuclides, e.g. 44-Ti, 26-Al and 60-Fe have been detected, and annihilation radiation originating from interstellar positrons. In this talk the measurement techniques and the astrophysical processes and conditions are highlighted. Recent observations and open questions are discussed.
Inhalt
Kapitel Titel Position
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1. Vorspann 00:00:00
2. W. Kutschera: Begrüßung und Einleitung 00:00:14
3. Nukleosynthese 00:06:26
4. Sternentstehung und Sternstruktur 00:16:21
5. Cosmic cycles of matter 00:24:50
6. Gamma-ray astronomy 00:32:34
7. Dominant nuclear reactions 00:42:26
8. Galactic structure, supernovae and massive stars 00:46:42
9. Iron production in stars 00:56:18
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