筑波大学 宇宙物理学研究室 森正夫
Theoretical Astrophysics and Computational Physics

Achievements

See a summary of my research achievements

Below is a list of my recent research papers, selected papers to date, and received research funding.

Recent publications

  • Accelerated Hermite integrator for orbital integration with OpenACC and MPI,
    Otaki, Koki; Mori, Masao; Miki, Yohei; Takahashi, Daisuke, submitted to the Journal of Supercomputing.
  • The Characteristic Mass and Energy Conversion Efficiency in the Cusp-Core Transition of Dark Matter Haloes: Implications for Scaling Relations and Supernova Feedbacks,
    Shinozaki, Michi; Mori, Masao; Kaneda, Yuka; Hayashi, Kohei, has been accepted for publication in Monthly Notices of the Royal Astronomical Society. [arXiv:2601.13868]
  • Cusp-to-Core Transition of Dark Matter Halos across Galaxy Mass Scales,
    Hayashi, Kohei; Kaneda, Yuka; Mori, Masao; Shinozaki, Michi, accepted for publication in 'Publications of the Astronomical Society of Japan.' [arXiv:2507.22155]
  • Collision frequency between dark matter subhaloes within Milky Way-like galaxies,
    Otaki, Koki; Kazuno, Yudai; Mori, Masao, New Astronomy, 124, 102501 (2026). [New Astronomy / arXiv:2511.16464]
  • Formation of the Andromeda Giant Stream and the 10 kpc Ring Structure in the Andromeda Galaxy,
    Mori, Masao; Hotta, Ayami; Otaki, Koki, "Dynamical Masses of Local Group Galaxies", Proceedings of the International Astronomical Union, 379, 110-115 (2025). [ IAUS379]
  • c-M relation of the sub-galactic dark matter halos and the effect of the cusp-to-core transition,
    Kaneda, Yuka; Otaki, Koki; Mori, Masao, "Dynamical Masses of Local Group Galaxies", Proceedings of the International Astronomical Union, 379, 172-176 (2025). [ IAUS379]
  • Simultaneous Formation of the Andromeda Giant Southern Stream and the Substructures in the Andromeda Halo,
    Yamaguchi, Misa; Mori, Masao; Kirihara, Takanobu; Miki, Yohei; Ogami, Itsuki; Chiba, Masashi; Komiyama, Yutaka; Tanaka, Mikito, Publications of the Astronomical Society of Japan, 77, L36-L42 (2025) [PASJ / arXiv:2503.21217]
  • The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC. I.: New Insights on the stellar halo up to 120 kpc,
    Ogami, Itsuki, et al., Monthly Notices of the Royal Astronomical Society, 536, 530 (2025) [MNRAS / arXiv:2401.00668]
  • Cosmological evolution of dark matter subhaloes under tidal stripping by growing Milky Way-like galaxies,
    Kazuno, Yudai; Mori, Masao; Kaneda, Yuka; Otaki, Koki, Publications of the Astronomical Society of Japan, 76, L39 (2024) [PASJ / arXiv:2410.22185]
  • A universal scaling relation incorporating the cusp-to-core transition of dark matter haloes,
    Kaneda, Yuka; Mori, Masao; Otaki, Koki, Publications of the Astronomical Society of Japan, 76, 1026 (2024) [PASJ / arXiv:2407.03614]
  • Novel hydrodynamic schemes capturing shocks and contact discontinuities and comparison study with existing methods,
    Yuasa, Takuhiro; Mori, Masao, New Astronomy, 109, 102208 (2024). [New Astronomy / arXiv:2312.03224v3]
  • Frequency of the dark matter subhalo collisions and bifurcation sequence arising from the formation of dwarf galaxies,
    Otaki, Koki; Mori, Masao, Monthly Notices of the Royal Astronomical Society, 525, 2535-2552 (2023). [MNRAS / arXiv:2308.03737]
  • Transonic galactic wind model including stellar Feedbacks and application to outflows in high/low-z galaxies,
    Igarashi, Asuka; Mori, Masao; Nitta, Shin-ya, Publications of the Astronomical Society of Japan, 75, 1214-1245 (2023).
  • Study of Galaxy Collisions and Thermodynamic Evolution of Gas Using the Exact Integration Scheme,
    Otaki, Koki; Mori, Masao, Lecture Notes in Computer Science, 13378, 373-387 (2022).
  • Destruction of the central black hole gas reservoir through head-on galaxy collisions,
    Miki, Yohei; Mori, Masao; Kawaguchi, Toshihiro, Nature Astronomy, 5, 478-484 (2021).
  • Discrimination of heavy elements originating from Pop III stars in z = 3 intergalactic medium,
    Kirihara, Takanobu; Hasegawa, Kenji; Umemura, Masayuki; Mori, Masao; Ishiyama, Tomoaki, Monthly Notices of the Royal Astronomical Society, 491, 4387-4395 (2020).
  • Stellar Stream and Halo Structure in the Andromeda Galaxy from a Subaru/Hyper Suprime-Cam Survey,
    Komiyama, Yutaka; Chiba, Masashi; Tanaka, Mikito; Tanaka, Masayuki; Kirihara, Takanobu; Miki, Yohei; Mori, Masao, et al., Astrophysical Journal, 853, 29 (2018).
  • Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program strategy and clustering properties of ~2000 Lya emitters at z = 6-7 over the 0.3-0.5 Gpc2 survey area,
    Ouchi, Masami; Harikane, Yuichi; Shibuya, Takatoshi; Shimasaku, Kazuhiro; Taniguchi, Yoshiaki; Konno, Akira; Kobayashi, Masakazu; Kajisawa, Masaru; Nagao, Tohru; Ono, Yoshiaki; Inoue, Akio K.; Umemura, Masayuki; Mori, Masao, et al., Publications of the Astronomical Society of Japan, 70, 13O (2018)
  • The nature of the progenitor of the M31 north-western stream: globular clusters as milestones of its orbit,
    Kirihara, Takanobu; Miki, Yohei; Mori, Masao, Monthly Notices of the Royal Astronomical Society, 469, 3390 (2017).
  • Formation of the Andromeda giant stream: asymmetric structure and disc progenitor,
    Kirihara, Takanobu; Miki, Yohei; Mori, Masao; Kawaguchi, Toshihiro; Rich, R. Michael, Monthly Notices of the Royal Astronomical Society, 464, 35 (2017).
  • ALMA Reveals Strong [C II] Emission in a Galaxy Embedded in a Giant Lyα Blob at z = 3.1,
    Umehata, Hideki; Matsuda, Yuichi; Tamura, Yoichi; Kohno, Kotaro; Smail, Ian; Ivison, R. J.; Steidel, Charles C.; Chapman, Scott C.; Geach, James E.; Hayes, Matthew; Nagao, Tohru; Ao, Yiping; Kawabe, Ryohei; Yun, Min S.; Hatsukade, Bunyo; Kubo, Mariko; Kato, Yuta; Saito, Tomoki; Ikarashi, Soh; Nakanishi, Kouichiro; Lee, Minju; Izumi, Takuma; Mori, Masao; Ouchi, Masami, Astrophysical Journal, 834, L16 (2017).
  • Universal Dark Halo Scaling Relation for the Dwarf Spheroidal Satellites,
    Hayashi, Kohei; Ishiyama, Tomoaki; Ogiya, Go; Chiba, Masashi; Inoue, Shigeki; Mori, Masao, Astrophysical Journal, 843, 97 (2017).
  • Polytropic transonic galactic outflows in a dark matter halo with a central black hole,
    Igarashi, Asuka; Mori, Masao; Nitta, Shin-ya, Monthly Notices of the Royal Astronomical Society, 470, 2225 (2017).

Selected publications

  • Destruction of the central black hole gas reservoir through head-on galaxy collisions, Miki, Yohei; Mori, Masao; Kawaguchi, Toshihiro, Nature Astronomy, 5, 478-484 (2021).

  • The connection between the cusp-to-core transformation and observational universalities of DM haloes, Ogiya, Go; Mori, Masao; Ishiyama, Tomoaki; Burkert, Andreas, Astrophysical Journal, 440, L7 (2014)

  • The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Oscillation, Ogiya, Go; Mori, Masao, Astrophysical Journal, 793, 46 (2014).

  • The Once and Future Andromeda Stream, Mori, Masao; Rich, R. Michael, Astrophysical Journal, 674, L77 (2008).

  • The evolution of galaxies from primeval irregulars to present-day ellipticals, Mori, Masao; Umemura, Masayuki, Nature, 440, 644 (2006).

  • The Nature of Lyα Blobs: Supernova-dominated Primordial Galaxies,
    Mori, Masao; Umemura, Masayuki; Ferrara, Andrea, Astrophysical Journal, 613, L97 (2004).

  • Early Metal Enrichment by Pregalactic Outflows. II. Three-dimensional Simulations of Blow-Away, Mori, Masao; Ferrara, Andrea; Madau, Piero, Astrophysical Journal, 571, 40 (2002).

  • Gas Stripping of Dwarf Galaxies in Clusters of Galaxies, Mori, Masao; Burkert, Andreas, Astrophysical Journal, 538, 559 (2000).

  • Dissipative Process as a Mechanism of Differentiating Internal Structures between Dwarf and Normal Elliptical Galaxies in a Cold Dark Matter Universe, Mori, Masao; Yoshii, Yuzuru; Tsujimoto, Takuji; Ken'ichi, Nomoto, Astrophysical Journal, 511, 585 (1999).

  • The Evolution of Dwarf Galaxies with Star Formation in an Outward-propagating Supershell, Mori, Masao; Yoshii, Yuzuru; Tsujimoto, Takuji; Nomoto, Ken'ichi, Astrophysical Journal, 478, L21 (1997).

Research grants

  • 2025
    "Galaxy Collisions and the Evolution of the Galactic Habitable Zone" (NAOJ Astrobiology Center Project, Principal Investigator)

  • 2024-2027
    "Hunting Dark Satellites Problem: Clarification of the Dark Matter Paradox" (Grant-in-Aid for Scientific Research (C), Principal Investigator)

  • 2024-2026
    "Stellar System Dynamics Theory of Galaxies and its Application to the Elucidation of Galactic Dark Matter" (Principal Investigator: Masafumi Chiba, Fundamental Research (B), Co-Investigator)

  • 2020-2023
    "Do Dark Satellites Exist? - Elucidating Problems in the Cold Dark Matter Model" (Grant-in-Aid for Scientific Research (C), Principal Investigator)

  • 2015-2019
    "Cosmological-Scale Material Cycles Explored by Subaru HSC and SDSS" (Principal Investigator: Masami Ouchi, Grant-in-Aid for Scientific Research (A), Co-Investigator)

  • 2013-2018
    "Construction of a Galaxy Phylogenetic Tree by Radiative-Fluid Simulations" (Grant-in-Aid for Scientific Research (C), Principal Investigator)

  • 2011-2014
    "Cosmic Reionisation by Next Generation Large Scale Exploration and Simulation" (Principal Investigator: Masami Ouchi, Grant-in-Aid for Scientific Research (A), Co-Investigator)

  • 2009-2012
    "Exploration of Galaxy Genesis by Combining Theory and Observation" (Grant-in-Aid for Scientific Research (A), Principal Investigator)

  • 2008-2012
    "Unravelling the Cosmic Dark Ages from First Generation Objects to Protogalaxies" (Principal Investigator: Masayuki Umemura, Specially Promoted Research, Co-Investigator)

  • 2006-2008
    "Galaxy Ontogeny Probed by High-Precision Hybrid Simulations" (Grant-in-Aid for Scientific Research (C), Principal Investigator)

  • 2004-2007
    "Investigation of the Origin of the First Generation of Cosmic Objects Using Fusion Parallel Computing" (Principal Investigator: Masayuki Umemura, Specially Promoted Research, Co-Investigator)

  • 2002-2004
    "Broadband Modelling of Galaxy Evolution by Hybrid Simulation" (Young Scientists (B), Principal Investigator)

  • 2003-2004
    "Material Circulation Processes in the Universe Probed by Parallel Computers" (Fund for the Promotion of Science, Japan Association for the Promotion and Mutual Aid of Private Schools, Principal Investigator)

  • 2003
    "Formation of First Generation Galaxies: Strategies Towards Observational Demonstration of Physical Scenarios" (Principal Investigator: Ryoichi Nishi, JSPS Japan-Italy Seminar)

  • 2002
    "Formation of First Generation Galaxies and Its Cosmological Significance" (Principal Investigator
    Masayuki Umemura, JSPS Japan-Italy Seminar)

  • 2001
    Research Grant from the Astronomy Foundation (Principal Investigator)

  • 1997-1999
    JSPS Postdoctoral Fellowship for Research Fellows (Principal Investigator)