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Paper: Effects of Photodissociation on the Fragmentation of Accretion Disk around Proto First Stars
Volume: 458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way
Page: 81
Authors: Susa, H.
Abstract: Very recently, the final stages of the first star formation have been investigated intensively. At such stages, an accretion disk is formed around the very first seed of a proto-star, and they seem to fragment inevitably. As a result, it might be possible for sub-solar mass first stars to form from such fragments. However, most of the previous numerical studies did not include the effects of photodissociating radiation from the first proto-stars, which could suppress the fragmentation of the disk. In this paper we include the transfer of Lyman-Werner photons to assess the effects of photodissociation on the fragmentation of the accretion disk. Consequently, we find that the dissociating radiation tends to suppress the mass accretion, but it cannot quench the fragmentation process.
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