Publications/論文

〇 Publications list link (orcid): NASA/ADS

〇 Publications list link : Google Scholar

2025

• [lead-paper]
  "Expectation for the MeV Gamma-Ray Emission from Pair-Instability Supernovae",
  Ryo Sawada (2025), accepted for publication in The Astrophysical Journal,
  https://iopscience.iop.org/article/10.3847/1538-4357/ade3cd

• "Destratification in the Progenitor Interior of the Mg-rich Supernova Remnant N49B",
  T. Sato, K. Matsunaga, Ryo Sawada, K. Takahashi, Y. Suwa, J. P. Hughes, H. Uchida, T. Narita, H. Umeda (2025), The Astrophysical Journal, 984, 185
  https://iopscience.iop.org/article/10.3847/1538-4357/adc68d

• [lead-paper]
  "Towards Multi Energy Neutrino Astronomy: Diagnosing Enhanced Circumstellar Material around Stripped-Envelope Supernovae",
  Ryo Sawada & Y. Ashida (2025), The Astrophysical Journal, 982 (1), 93 
  https://doi.org/10.3847/1538-4357/adb721
  

2024

• [lead-paper]
  "Gravitational Collapse of White Dwarfs to Neutron Stars. I. From Initial Conditions to Explosions with Neutrino-radiation Hydrodynamics Simulations",
  M. Mori*, Ryo Sawada*, Y. Suwa, A. Tanikawa, K. Kashiyama, K. Murase (2024), Publications of the Astronomical Society of Japan, psae104 (*These two authors contributed equally to this work.)
  https://doi.org/10.1093/pasj/psae104
  

• "Progenitor Constraint-incorporating Shell Merger: The Case of Supernova Remnant G359.0–0.9",
  K. Matsunaga, H. Uchida, R. Enokiya, T. Sato, Ryo Sawada, H. Umeda, T. Narita, T. G. Tsuru (2024), The Astrophysical Journal, 970 (1), 4
  https://iopscience.iop.org/article/10.3847/1538-4357/ad5284 

• "Impacts of the 12C(α,γ)16O reaction rate on 56Ni nucleosynthesis in pair-instability supernovae",
  H. Kawashimo, Ryo Sawada, Y. Suwa, T. J. Moriya, A. Tanikawa, N. Tominaga (2024), Monthly Notices of the Royal Astronomical Society, 531 (2), 2786–2801
  https://academic.oup.com/mnras/article/531/2/2786/7676192 

• [lead-paper]
  "Self-consistent Conditions for 26Al Injection into Protosolar Disk from a Nearby Supernova",
  Ryo Sawada, T. Taki, H. Kurokawa, Y. Suwa (2024), The Astrophysical Journal, 963 (1), 68
  https://iopscience.iop.org/article/10.3847/1538-4357/ad1e62
  

• "Binary Interaction Can Yield a Diversity of Circumstellar Media around Type II Supernova",
  T. Matsuoka & Ryo Sawada (2024), The Astrophysical Journal, 963 (2), 105
  https://iopscience.iop.org/article/10.3847/1538-4357/ad1829

2023

• [lead-paper] 
  "Updating the 56Ni Problem in Core-collapse Supernova Explosion",
  Ryo Sawada & Y. Suwa (2023), submitted
  https://arxiv.org/abs/2301.03610

2022

• [lead-paper]
  "On the Energy Source of Ultrastripped Supernovae",
  Ryo Sawada, K.Kashiyama, Y. Suwa (2022), The Astrophysical Journal 927 (2),223 
  https://iopscience.iop.org/article/10.3847/1538-4357/ac53ae
  

• "X-Raying the Birth of Binary Neutron Stars and Neutron Star–Black Hole Binaries",
  K.Kashiyama, Ryo Sawada, Y. Suwa (2022), The Astrophysical Journal, 935 (2), 86
  https://iopscience.iop.org/article/10.3847/1538-4357/ac7ff7

• "Constraints on the Explosion Timescale of Core-collapse Supernovae Based on Systematic Analysis of Light Curves",
  S. Saito, M. Tanaka, Ryo Sawada, T.J. Moriya (2022), The Astrophysical Journal, 931 (2), 153 
  https://iopscience.iop.org/article/10.3847/1538-4357/ac6bec

2021

• [lead-paper]
  "A Consistent Modeling of Neutrino-driven Wind with Accretion Flow onto a Protoneutron Star and Its Implications for 56Ni Production",
  Ryo Sawada & Y. Suwa (2021), The Astrophysical Journal 908 (1), 6
  https://iopscience.iop.org/article/10.3847/1538-4357/abd476

• "Are Stripped Envelope Supernovae Really Deficient in 56Ni?",
  R. Ouchi, K. Maeda, J.P. Anderson, Ryo Sawada (2021), The Astrophysical Journal 922 (2), 141  
  https://iopscience.iop.org/article/10.3847/1538-4357/ac2306 
  

2019

• [lead-paper]
  "Nucleosynthesis Constraints on the Energy Growth Timescale of a Core-collapse Supernova Explosion",
  Ryo Sawada & K. Maeda (2019), The Astrophysical Journal 886 (1), 47 https://iopscience.iop.org/article/10.3847/1538-4357/ab4da3

Before 2018

• "Systematic analysis of inelastic scattering off self-conjugate A=4n nuclei",
  S. Adachi, T. Kawabata, K. Minomo, Ryo Sawada, et al. (2018), Physical Review C 97 (1), 014601
  https://journals.aps.org/prc/abstract/10.1103/PhysRevC.97.014601

• "Time-Reversal Measurement of the -Wave Cross Sections of the 7Be(n,α)4He Reaction for the Cosmological Li Problem",
  T. Kawabata, Y. Fujikawa, T. Furuno, Ryo Sawada, et al. (2017), Physical review letters 118 (5), 052701 
  https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.052701