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Michaël De Becker

Massive stars: privileged sources of cosmic-rays for interstellar astrochemistry

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Mots-clés : astrochimie, étoile massive, milieu interstellaire, rayon cosmique

Abstract

Massive stars can be considered as crucial engines for interstellar physics. They are indeed the main providers of UV radiation field, and constitute a substantial source of chemical enrichment. On their evolution time-scale (at most about 10 Myr), they typically stay close to their formation site, i.e. close to molecular clouds very rich in interstellar molecules. These stellar objects have also the property to be involved in particle acceleration processes leading to the production of high energy charged particles (cosmic-rays). After rejection in the interstellar medium, these particles will play a substantial role in processes such as those simulated in various facilities dedicated to experimental astrochemistry. This short contribution intends to put these particles, crucial for astrochemistry, in their adequate astrophysical context.

Keywords : astrochemistry, cosmic-ray, interstellar medium, massive star

To cite this article

Michaël De Becker, «Massive stars: privileged sources of cosmic-rays for interstellar astrochemistry», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 84 - Année 2015, Actes de colloques, Workshop d'astrochimie expérimentale, 15 - 20 URL : https://popups.uliege.be:443/0037-9565/index.php?id=4593.

About: Michaël De Becker

Department of Astrophysics, Geophysics & Oceanography, University of Liège, Belgium and Liège Space Research Institute (LiSRI), University of Liège, Belgium, debecker@astro.ulg.ac.be