188 citations · 473 across the 20 of their papers we have counts for
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The First Star-by-star -body/Hydrodynamics Simulation of Our Galaxy Coupling with a Surrogate Model
Keiya Hirashima, Michiko S. Fujii, Takayuki R. Saitoh +9
A major goal of computational astrophysics is to simulate the Milky Way Galaxy with sufficient resolution down to individual stars. However, the scaling fails due to some small-sca…
ASURA-FDPS-ML: Star-by-star Galaxy Simulations Accelerated by Surrogate Modeling for Supernova Feedback
Keiya Hirashima, Kana Moriwaki, Michiko S. Fujii +5
We introduce new high-resolution galaxy simulations accelerated by a surrogate model that reduces the computation cost by approximately 75 percent. Massive stars with a Zero Age Ma…
Surrogate Modeling for Computationally Expensive Simulations of Supernovae in High-Resolution Galaxy Simulations
Keiya Hirashima, Kana Moriwaki, Michiko S. Fujii +4
Some stars are known to explode at the end of their lives, called supernovae (SNe). The substantial amount of matter and energy that SNe release provides significant feedback to st…
The 300 pc resolution imaging of a z = 8.31 galaxy: Turbulent ionized gas and potential stellar feedback 600 million years after the Big Bang
Yoichi Tamura, Tom J. L. C. Bakx, Akio K. Inoue +16
We present the results of 300 pc resolution ALMA imaging of the [OIII] 88 m line and dust continuum emission from a Lyman break galaxy MACS0416_Y1. The velocity-inte…
3D-Spatiotemporal Forecasting the Expansion of Supernova Shells Using Deep Learning toward High-Resolution Galaxy Simulations
Keiya Hirashima, Kana Moriwaki, Michiko S. Fujii +3
Supernova (SN) plays an important role in galaxy formation and evolution. In high-resolution galaxy simulations using massively parallel computing, short integration timesteps for…
Possible Systematic Rotation in the Mature Stellar Population of a Galaxy
Tsuyoshi Tokuoka, Akio K. Inoue, Takuya Hashimoto +13
We present new observations with the Atacama Large Millimeter/submillimeter Array for a gravitationally-lensed galaxy at , MACS1149-JD1. [O III] 88-m emission is detected…
Deep learning reconstruction of three-dimensional galaxy distributions with intensity mapping observations
Kana Moriwaki, Naoki Yoshida
Line intensity mapping is emerging as a novel method that can measure the collective intensity fluctuations of atomic/molecular line emission from distant galaxies. Several observa…
Capturing the inside-out quenching by black holes with far-infrared atomic line ratios
Shigeki Inoue, Hiroshi Matsuo, Naoki Yoshida +2
We propose to use relative strengths of far-infrared fine structure lines from galaxies to characterise early phases of the inside-out quenching by massive black holes (BHs). The B…
Deep Learning for Line Intensity Mapping Observations: Information Extraction from Noisy Maps
Kana Moriwaki, Masato Shirasaki, Naoki Yoshida
Line intensity mapping (LIM) is a promising observational method to probe large-scale fluctuations of line emission from distant galaxies. Data from wide-field LIM observations all…
Deep learning for intensity mapping observations: Component extraction
Kana Moriwaki, Nina Filippova, Masato Shirasaki +1
Line intensity mapping (LIM) is an emerging observational method to study the large-scale structure of the Universe and its evolution. LIM does not resolve individual sources but p…
Large Population of ALMA Galaxies at z>6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit?
Yuichi Harikane, Masami Ouchi, Akio K. Inoue +20
We present our new ALMA observations targeting [OIII]88um, [CII]158um, [NII]122um, and dust continuum emission for three Lyman break galaxies at z=6.0293-6.2037 identified in the S…
Cross-correlation between the 21-cm signal and [OIII] emitters during early cosmic reionization
K. Moriwaki, N. Yoshida, M. B. Eide +1
We study statistics of the 21-cm signal from the epoch of reionization. We propose to use [OIII] line emitting galaxies to cross-correlate with the 21-cm signal from .…
The distribution and physical properties of high-redshift [OIII] emitters in a cosmological hydrodynamics simulation
Kana Moriwaki, Naoki Yoshida, Ikkoh Shimizu +7
Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) detected far-infrared emission lines such as the [OIII] 88 μm line from galaxies at .…