Search Results - "Chiaki, Gen"

Disc fragmentation and oligarchic growth of protostellar systems in low-metallicity gas clouds by Chiaki, Gen, Yoshida, Naoki

“…ABSTRACT We study low-metallicity star formation with a set of high-resolution hydrodynamics simulations for various gas metallicities over a wide range…”
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Seeding the second star: enrichment from population III, dust evolution, and cloud collapse by Chiaki, Gen, Wise, John H

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Classification of extremely metal-poor stars: absent region in A(C)–[Fe/H] plane and the role of dust cooling by Chiaki, Gen, Tominaga, Nozomu, Nozawa, Takaya

“…Abstract Extremely metal-poor (EMP) stars are the living fossils with records of chemical enrichment history at the early epoch of galaxy formation. By the…”
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Amplification of Turbulence in Contracting Prestellar Cores in Primordial Minihalos by Higashi, Sho, Susa, Hajime, Chiaki, Gen

“…Abstract We investigate the amplification of turbulence through gravitational contraction of the primordial gas in minihalos. We perform numerical simulations…”
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Gravitational collapse and the thermal evolution of low-metallicity gas clouds in the early Universe by Chiaki, Gen, Yoshida, Naoki, Hirano, Shingo

“…We study gravitational collapse of low-metallicity gas clouds and the formation of protostars by three-dimensional hydrodynamic simulations. Grain growth,…”
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Does the structure of Population III supernova ejecta affect the elemental abundance of extremely metal-poor stars? by Chiaki, Gen, Tominaga, Nozomu

“…ABSTRACT The first generation of metal-free (Population III) stars are crucial for the production of heavy elements in the earliest phase of structure…”
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Amplification and Saturation of Turbulent Magnetic Fields in Collapsing Primordial Gas Clouds by Higashi, Sho, Susa, Hajime, Federrath, Christoph, Chiaki, Gen

“…Abstract Recent numerical studies suggest that magnetic fields play an important role in primordial star formation in the early Universe. However, the detailed…”
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Saturation Level of Turbulence in Collapsing Gas Clouds by Higashi, Sho, Susa, Hajime, Chiaki, Gen

“…Abstract We investigate the physical mechanism that determines the saturation level of the turbulence in collapsing gas clouds. We perform a suite of…”
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Triggered Population III star formation: the effect of H2 self-shielding by Chiaki, Gen, Wise, John H

“…ABSTRACT The multiplicity of metal-free (Population III) stars may influence their feedback efficiency within their host dark matter haloes, affecting…”
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Particle splitting in smoothed particle hydrodynamics based on Voronoi diagram by Chiaki, Gen, Yoshida, Naoki

“…We present a novel method for particle splitting in smoothed particle hydrodynamics simulations. Our method utilizes the Voronoi diagram for a given particle…”
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Accelerated Growth of Seed Black Holes by Dust in the Early Universe by Park, KwangHo, Chiaki, Gen, Wise, John H.

“…Abstract We explore the effect of dust on the growth of seed black holes (BHs) in the early universe. Previous 1D radiation-hydrodynamic (RHD) simulations show…”
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Formation of massive stars under protostellar radiation feedback: very metal-poor stars by Fukushima, Hajime, Hosokawa, Takashi, Chiaki, Gen, Omukai, Kazuyuki, Yoshida, Naoki, Kuiper, Rolf

“…ABSTRACT We study the formation of very metal-poor stars under protostellar radiative feedback effect. We use cosmological simulations to identify low-mass…”
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Direct-collapse black hole formation induced by internal radiation of host haloes by Chiaki, Gen, Chon, Sunmyon, Omukai, Kazuyuki, Trinca, Alessandro, Schneider, Raffaella, Valiante, Rosa

“…ABSTRACT We estimate the fraction of haloes that host supermassive black holes (SMBHs) forming through the direct-collapse (DC) scenario by using cosmological…”
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Blocking Metal Accretion onto Population III Stars by Stellar Wind by Tanaka, Shuta J., Chiaki, Gen, Tominaga, Nozomu, Susa, Hajime

“…Low-mass population III (PopIII) stars of could survive up until the present. The nondetection of low-mass PopIII stars in our Galaxy has already put a…”
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Metal-poor star formation triggered by the feedback effects from Pop III stars by Chiaki, Gen, Susa, Hajime, Hirano, Shingo

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Seeding the second star – II. CEMP star formation enriched from faint supernovae by Chiaki, Gen, Wise, John H, Marassi, Stefania, Schneider, Raffaella, Limongi, Marco, Chieffi, Alessandro

“…ABSTRACT Carbon-enhanced metal-poor (CEMP) stars are the living fossils holding records of chemical enrichment from early generations of stars. In this work,…”
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The Supersonic Project: Early Star Formation with the Streaming Velocity by Lake, William, Williams, Claire E., Naoz, Smadar, Marinacci, Federico, Burkhart, Blakesley, Vogelsberger, Mark, Yoshida, Naoki, Chiaki, Gen, Chen, Avi, Chiou, Yeou S.

“…Abstract At high redshifts ( z ≳ 12), the relative velocity between baryons and dark matter (the so-called streaming velocity) significantly affects star…”
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The Supersonic Project: The Early Evolutionary Path of Supersonically Induced Gas Objects by Lake, William, Naoz, Smadar, Burkhart, Blakesley, Marinacci, Federico, Vogelsberger, Mark, Chiaki, Gen, Chiou, Yeou S., Yoshida, Naoki, Nakazato, Yurina, Williams, Claire E.

“…Abstract Supersonically induced gas objects (SIGOs) are a class of early universe objects that have gained attention as a potential formation route for…”
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Supernova dust formation and the grain growth in the early universe: the critical metallicity for low-mass star formation by Chiaki, Gen, Marassi, Stefania, Nozawa, Takaya, Yoshida, Naoki, Schneider, Raffaella, Omukai, Kazuyuki, Limongi, Marco, Chieffi, Alessandro

“…We investigate the condition for the formation of low-mass second-generation stars in the early Universe. It has been proposed that gas cooling by dust thermal…”
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The Supersonic Project: The Eccentricity and Rotational Support of SIGOs and DM GHOSts by Williams, Claire E., Naoz, Smadar, Lake, William, Chiou, Yeou S., Burkhart, Blakesley, Marinacci, Federico, Vogelsberger, Mark, Chiaki, Gen, Nakazato, Yurina, Yoshida, Naoki

“…Abstract A supersonic relative velocity between dark matter (DM) and baryons (the stream velocity) at the time of recombination induces the formation of…”
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