Star Formation with ALMA

S. Guilloteau 1
1 AMOR 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
Abstract : Stars are believed to form from interstellar material through the gravitational collapse of dusty clouds. Interstellar medium is a very dynamical environment in which clouds of atomic gas (and its associated dust counterpart) form in warm medium fragments, perhaps as a result of turbulence or the passage of shock, and subsequently cool down and condense. Although the dust is a tiny fraction (of order 1%) of the total material mass, it plays a major role in the cloud evolution because its opacity can shield the cloud center from the interstellar UV field and dust surfaces act as a catalyst on which molecular hydrogen can form. For high enough column density, the combined effect of dust shielding and self-shielding of H 2 2 turn the initially predominantly atomic gas into molecular form. H 2 2 forms first, but more and more complex species such as CO, CN, and HCN, form during cloud evolution.
Keywords : Physics
Type de document :
Communication dans un congrès
38th SAAS-FEE Advanced Course on Millimeter Astronomy - 3-8 Mar 2008. Les Diablerets, Switzerland - Millimeter Astronomy, Saas-Fee Advanced Course, Volume 38. ISBN 978-3-662-57545-1. Springer-Verlag GmbH Germany, part of Springer Nature, 2018, p. 111, Mar 2018, Les Diablerets, Switzerland. 〈10.1007/978-3-662-57546-8_2〉
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https://hal.archives-ouvertes.fr/hal-01868326
Contributeur : Marie-Paule Pomies <>
Soumis le : mercredi 5 septembre 2018 - 13:01:44
Dernière modification le : mercredi 19 septembre 2018 - 01:19:23

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S. Guilloteau. Star Formation with ALMA. 38th SAAS-FEE Advanced Course on Millimeter Astronomy - 3-8 Mar 2008. Les Diablerets, Switzerland - Millimeter Astronomy, Saas-Fee Advanced Course, Volume 38. ISBN 978-3-662-57545-1. Springer-Verlag GmbH Germany, part of Springer Nature, 2018, p. 111, Mar 2018, Les Diablerets, Switzerland. 〈10.1007/978-3-662-57546-8_2〉. 〈hal-01868326〉

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