74 citations · 279 across the 11 of their papers we have counts for
8 papers · 1 filter
Supernova dust synthesis --- Carbonaceous dust in the very early universe
Gen Chiaki, Takaya Nozawa, Chiaki Kobayashi +1
Recent observations have revealed the spectral feature of carbonaceous grains even in a very distant galaxy. We develop a state-of-the-art dust synthesis code by self-consistently…
The impact of carbon and oxygen abundances on the metal-poor initial mass function
Piyush Sharda, Anish M. Amarsi, Kathryn Grasha +5
Star formation models predict that the metal-poor initial mass function (IMF) can be substantially different from that observed in the metal-rich Milky Way. This changeover occurs…
Does the structure of Pop III supernova ejecta affect the elemental abundance of extremely metal-poor stars?
Gen Chiaki, Nozomu Tominaga
The first generation of metal-free (Pop III) stars are crucial for the production of heavy elements in the earliest phase of structure formation. Their mass scale can be derived fr…
Seeding the second star -- II. CEMP star formation enriched from faint supernovae
Gen Chiaki, John H. Wise, Stefania Marassi +3
Carbon-enhanced metal-poor (CEMP) stars are the living fossils holding records of chemical enrichment from early generations of stars. In this work, we perform a set of numerical s…
Seeding the Second Star: enrichment from population III, dust evolution, and cloud collapse
Gen Chiaki, John H. Wise
We investigate the formation of extremely metal-poor (EMP) stars that are observed in the Galactic halo and neighboring ultra-faint dwarf galaxies. Their low metal abundances (${\r…
Metal-poor star formation triggered by the feedback effects from Pop III stars
Gen Chiaki, Hajime Susa, Shingo Hirano
Metal enrichment by the first-generation (Pop III) stars is the very first step of the matter cycle in the structure formation and it is followed by the formation of extremely meta…
Classification of extremely metal-poor stars: absent region in A(C)-[Fe/H] plane and the role of dust cooling
Gen Chiaki, Nozomu Tominaga, Takaya Nozawa
Extremely metal-poor (EMP) stars are the living fossils with records of chemical enrichment history at the early epoch of galaxy formation. By the recent large observation campaign…
Blocking metal accretion onto population III stars by stellar wind
Shuta J. Tanaka, Gen Chiaki, Nozomu Tominaga +1
Low-mass population III (PopIII) stars of could survive up until the present. Non-detection of low-mass PopIII stars in our Galaxy has already put a string…