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OATS-UNI/TS SEMINAR
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Speaker: Raffaella Schneider (INAF - OARoma)

Title: Dust formation in the first supernovae
Date: Wednesday, December 4th, 2013
Time: 11:30
Venue: Villa Bazzoni
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Abstract The first supernovae to explode in the Universe start the process of metal enrichment and have a major impact on early structure formation in the Universe. The metals and dust grains released and dispersed by the first supernovae change the cooling properties of the interstellar medium out of which second generation stars form, allowing the first low-mass and long-lived stars to form. Stellar archaeology of the most metal-poor stars observed in the halo of our galaxy and its dwarf satellites is providing strong constraints on these early star formation and chemical enrichment phases. Yet, theoretical predictions have to rely on poorly constrained physical parameters, such as the mass of Population III stars and their physical properties. Here we present a systematic investigation of the metal and dust yields released by the first supernovae with the aim to reproduce the properties of the environment out of which the most metal-poor stars have formed. Furthermore, we discuss the mass and composition of dust yields and the role of dust-induced cooling and fragmentation in the formation of the most metal-poor stars.
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Contact: John Danziger (OATS)