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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)