426 citations · 3.2k across the 59 of their papers we have counts for
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Population III Supernovae as a dust factory I --- molecule formation and mixing/fallback in ejecta
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…
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…
Pure iron grains are rare in the universe
Yuki Kimura, Kyoko K. Tanaka, Takaya Nozawa +2
The abundant forms in which the major elements in the universe exist have been determined from numerous astronomical observations and meteoritic analyses. Iron (Fe) is an exception…
Dust evolution with active galactic nucleus feedback in elliptical galaxies
Hiroyuki Hirashita, Takaya Nozawa
We have recently suggested that dust growth in the cold gas phase dominates the dust abundance in elliptical galaxies while dust is efficiently destroyed in the hot X-ray emitting…
Properties of interstellar dust responsible for extinction laws with unusually low total-to-selective extinction ratios of Rv=1-2
Takaya Nozawa
It is well known that the extinction properties along lines of sight to Type Ia supernovae are described by steep extinction curves with unusually low total-to-selective extinction…
Revisiting the lifetime estimate of large presolar grains in the interstellar medium
Hiroyuki Hirashita, Takaya Nozawa, Ryosuke S. Asano +1
Some very large (>0.1 um) presolar grains are sampled in meteorites. We reconsider the lifetime of very large grains (VLGs) in the interstellar medium focusing on interstellar shat…