| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chieffi, Alessandro
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2015Supernova dust formation and the grain growth in the early universe: the critical metallicity for low-mass star formationcitations
- 2015The metal and dust yields of the first massive starscitations
- 2014Dust grain growth and the formation of the extremely primitive star SDSS J102915+172927citations
- 2014The Origin of the Most Iron-poor Starcitations
- 2013Growth of Dust Grains in a Low-Metallicity Gas and its Effect on the Cloud Fragmentation
- 2009Sulfur in the globular clusters <ASTROBJ>47 Tucanae</ASTROBJ> and <ASTROBJ>NGC 6752</ASTROBJ>citations
- 2008The Peculiar Type Ib Supernova 2006jc: A WCO Wolf-Rayet Star Explosioncitations
Places of action
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article
Growth of Dust Grains in a Low-Metallicity Gas and its Effect on the Cloud Fragmentation
Abstract
We study formation of low-mass star (< Msun) in an extremely metal-poor gas (Z ~ 10^-5 Zsun) in the early universe. Our study is motivated by the recent discovery of a low-mass (M* < 0.8 Msun) and extremely metal-poor (Z < 4.5x10^-5 Zsun) star in the Galactic halo by Caffau et al. In such a low-metallicity gas, dust cooling is considered to trigger instability even in an extremely low-metallicity cloud (Z < 10^-4 Zsun). However, in the early universe, the sites where grains are formed are limited and thus dust abundance is smaller than present-day. We propose a model that the accretion of heavy elements onto grain surfaces (grain growth) can induce dust cooling. We calculate cloud evolution and grain growth self-consistently. As a result, grain growth in a gas cloud can eventually enhance dust amount and induce dust cooling for the metallicity 4.5x10^-5 Zsun.