Ryosuke Hirai's Homepage

International Conferences

• Stars in Brisbane & 10th Australian Exoplanet Workshop
  University of Southern Queensland@Brisbane, Australia, Nov 2024, Invited talk "Supernovae in the context of binary evolution"
  
• The Progenitors of Supernovae and their Explosions
  Landscape Hotel@Dali, China, Aug 2024, Invited talk "Post-supernova binary interactions: the tale of SN2022jli"
  
• 41st Liège International Astrophysical Colloquium: The eventful life of massive star multiples
  Universite de Liege@Liege, Belgium, Jul 2024, Oral "Post-supernova binary interactions: the tale of SN2022jli"
  
• Fundamentals of Stellar Outflows: Celebrating and Amplifying the Scientific Life of Stan Owocki (StanFest)
  KU Leuven@Leuven, Belgium, Jul 2024, Oral "The chaotic history of Eta Carinae"
  
• ANITA workshop 2024
  Monash University@Melbourne, Australia, Feb 2024, Oral "Pulsar rocket science"
  
• Transients Down Under
  Swinburne University of Technology@Melbourne, Australia, Jan-Feb 2024, SOC
  
• RESCEU-NBIA workshop on gravitational-wave sources
  University of Tokyo@Tokyo, Japan, Dec 2023, Oral "Common envelope evolution in massive binaries" + Panel discussion chair on binary evolution
  
• Australian LSST workshop 2023
  University of New South Wales@Sydney, Australia, Sep 2023, Oral "Modelling of stellar-merger-driven transients"
  
• 2023 Aspen summer program -Stellar interactions and the transients they cause-
  Aspen Center for Physics@Aspen, USA, Jul 2023, Discussion leader on supernovae and binaries
  
• 2023 OzFink Workshop
  Swinburne University of Technology@Melbourne, Australia, May 2023, No presentation
  
• 2023 Aspen Winter Conference -eXtreme Black Holes-
  Aspen Center for Physics@Aspen, USA, Mar 2023, Poster "Wind-fed black hole high-mass X-ray binaries must have >80% Roche lobe filling companions"
  
• 4th Phantom + MCFOST users workshop
  Monash University@Melbourne, Australia, Feb 2023, Oral "New-born neutron stars colliding with companion stars"
  
• ANITA workshop 2023
  University of Adelaide@Adelaide, Feb 2023, Oral "Probing binary interaction physics with supernova explosions"
  
• Gravitational Wave Physics and Astronomy Workshop 2022
  Sofitel Melbourne (and Zoom), Australia, Dec 2022, Oral "A new formalism for common-envelope phases of massive stars"
  
• Supernovae in the Gravitational Wave Detection Era
  Swinburne University of Technology@Melbourne (and Zoom), Australia, Nov-Dec 2022, Invited talk "Supernovae and binary companions"
  
• SuperVirtual 2022 - From Common to Exotic Transients -
  Online, Nov 2022, Oral "New-born neutron stars colliding with companion stars"
  
• ASA Annual Science Meeting 2022
  University of Tasmania@Hobart (and Zoom), Australia, June 2022, Oral "Collisions between new-born neutron stars and stellar companions"
  
• SuperVirtual 2021 - From Common to Exotic Transients -
  Online, Nov 2021, No presentation
  
• Asymmetrical Post-main-sequence Nebulae 8 e2021 - The Shaping of Stellar Outflows
  Online (Granada, Spain), Oct 2021, Oral "Shaping of Eta Carinae's surrounding nebula"
  
• Common Envelope Physics and Outcomes (CEPO 2021)
  Online, Aug-Sep 2021, No presentation
  
• nuclear burning in massive stars – towards the formation of binary black holes –
  Online (YITP), Jul 2021, Organiser (Monash hub leader)
  
• ASA Annual Science Meeting 2021
  University of Melbourne@Melbourne (and Zoom), Australia, July 2021, Oral "Asymmetric winds in close binary systems"
  
• European Astronomical Society Annual Meeting 2021
  Online (Leiden), Jun 2021, Invited talk "Supernovae in Massive Binaries"
  
• Triple Evolution and Dynamics 3
  Online, Mar 2021, Poster "Formation of Eta Carinae’s Surrounding Nebula"
  
• ANITA workshop 2021
  Online (Australia), Feb 2021, Oral "Origin of the Cassiopeia A progenitor"
  
• 43rd COSPAR Scientific assembly
  International Convention Centre, Sydney@COSPAR online platform, Jan-Feb 2021, Poster "A new formation scenario for the progenitor of Cassiopeia A"
  
• 3rd Phantom + MCFOST users workshop
  Monash University@Melbourne, Australia, Feb 2020, Oral "Numerically modelling the origin of Eta Carinae"
  
• ANITA workshop 2020
  The School of Science UNSW Canberra@Canberra, Australia, Feb 2020, Oral "The history of Eta Carinae"
  
• FOE19 Fifty-one Erg
  NCSU Riddick Hall@Raleigh,North Carolina, USA, May 2019, Oral "The appearance of companion stars after supernovae in binaries"
  
• The Supernova-Supernova Remnant Connection
  Royal Astronomical Society@London, UK, Jan 2019, No presentation
  
• Massive Stars and Supernovae
  Gran Hotel Panamericano@Bariloche, Argentina, Nov 2018, Oral "Systematic study of ejecta-companion interaction"
  
• Frontiers of the Physics of Massive Stars: from the Main Sequence to LIGO
  UNAM@Ensenada, Mexico, Jul 2018, Oral "Ejecta-companion interaction in massive binaries"
  
• The Initial Mass Function: From Top to Bottom
  Royal Astronomical Society@London, UK, Nov 2017, No presentation
  
• Ringberg Workshop on "The Progenitor-Supernova-Remnant Connection"
  Ringberg Castle@Tegernsee, Germany, Jul 2017, Oral "The binary companion to the progenitor of iPTF13bvn"
  
• FOE17 Fifty-One Erg
  Oregon State University La Sells Stewart Center@Corvallis,Oregon, USA, Jun 2017, Poster "Formation Scenario of the Progenitor of iPTF13bvn"
  
• Molecule-type Workshop on "Transient Universe in the Big Survey Era: Understanding the Nature of Astrophysical Explosive Phenomena"
  Kyoto U.@Tokyo, Jan 2017, Oral "Revisiting the Formation Scenario of the Progenitor of iPTF13bvn"
  
• 2nd NAOJ-ECT* Workshop on "Many Riddles About Core-Collapse Supernovae: 1 Bethe and Beyond"
  NAOJ@Tokyo, Japan, Jul 2016, Oral "Lessons on binary star evolution from iPTF13bvn"
  
• Numazu Workshop 2015: Challenges of modeling supernovae with nuclear data
  Mishima CCI@Shizuoka, Japan, Sep 2015, Oral "Towards the Formation of Binary Neutron Stars", LOC
  
• F.O.E. Fifty-One Erg
  NCSU Riddick Hall@Raleigh,North Carolina, USA, Jun 2015, Oral "Ejecta-Companion interaction in iPTF 13bvn"
  
• Binary systems, their evolution and environments
  Mongolia-Japan Center@Ulaan Baatar,Mongolia, Sep 2014, Poster "Supernovae in Massive Binaries and their Impact on the Companion"
  
• Multi-Messengers from Core-Collapse Supernovae(MMCOCOS)
  Fukuoka U.@Fukuoka, Japan, Dec 2013, Poster "Supernovae in Massive Binaries and its Impact on the Companion"
  
• Formations of Compact Objects: from the cradle to the grave
  Waseda U.@Tokyo, Japan, Mar 2012, LOC

Japanese Conferences

• Fukui binary workshop 2024
  Fukui Prefectural University, May 2024, Oral "Binaries and Explosions"
  
• Spring Annual Meeting of the Astronomical Society of Japan
  Online (Tokyo), Mar 2024, Oral "中性子星ロケット機構が連星進化に及ぼす影響"
  
• Spring Annual Meeting of the Astronomical Society of Japan
  Online (Hiroshima), Mar 2022, Oral "超新星直後の中性子星と伴星との衝突現象"
  
• 34th Rironkon Symposium
  Online (ICRR), Dec 2021, Oral "大質量X線連星内での非等方な恒星風駆動と降着"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Online (Kyoto-Sangyo), Sep 2021, Oral "X線連星内での非対称な恒星風駆動と降着"
  
• Neutron Star Workshop 2021
  Online, Aug 2021, Oral "連星系内での非球対称な恒星風の降着"
  
• Spring Annual Meeting of the Astronomical Society of Japan
  Online (Tokyo-tech), Mar 2021, Oral "伴星を持たない水素欠乏超新星の親星の起源"
  
• Binary/Variable star workshop 2020
  Online (Kyoto), Jan 2021, Oral "イータカリーナを取り巻く星雲の起源"
  
• Stellar Alchemy to Galactic Archeology
  Online (NAOJ), Oct 2020, Invited talk "連星進化理論の現状と化学進化への影響"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Online (Hirosaki U.), Sep 2020, No presentation
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Kumamoto U., Sep 2019, Oral "イータ・カリーナと人形星雲の起源"
  
• 31st Rironkon Symposium
  YITP, Dec 2018, Poster "イータカリーナの星雲の起源"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Hokkaido U., Sep 2017, Oral "iPTF13bvnの親星系に存在するブラックホールの起源について"
  
• Spring Annual Meeting of the Astronomical Society of Japan
  Kyushu U., Mar 2017, Oral "iPTF13bvnの連星親星モデルの再検証"
  
• Ultra-Luminous X-ray Source Workshop 2017
  JAXA, Mar 2017, Oral "BH-NS binary formation in iPTF13bvn"
  
• 29th Rironkon Symposium
  Tohoku U., Dec 2016, Oral "iPTF13bvnの連星親星モデル"
  
• Conference on Binary systems, Variables and Cool Stars 2016
  Keio U., Oct 2016, Oral "超新星iPTF13bvnの連星親星モデル"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Ehime U., Sep 2016, Oral "流体力学シミュレーションにおける高速自己重力計算手法の提案"
  
• 46th Summer School of Young Astronomers and Astrophysicists
  Nagano, Jul 2016, Poster "自己重力流体シミュレーションにおける高速自己重力計算手法"
  
• A05 Camp
  Shizuoka, Jan 2016, No presentation
  
• 28th Rironkon Symposium
  Osaka U., Dec 2015, Poster "超新星爆発によって共通外層状態が誘発される可能性について"
  
• Spring Annual Meeting of the Astronomical Society of Japan
  Osaka U., Mar 2015, Oral "超新星爆発前後での連星系の生存可能性"
  
• A04/05 Joint Camp 2015
  Niigata, Jan 2015, Oral "中性子星連星の形成に向けた超新星爆発後の連星系の生存可能性"
  
• 27th Rironkon Symposium
  NAOJ, Dec 2014, Poster "iPTF 13bvnにおける伴星の観測的特徴"
  
• 2nd DTA Symposium
  NAOJ, Oct 2014, Oral"大質量連星系内での超新星爆発"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Yamagata U., Sep 2014, Oral "大質量連星系内での超新星爆発が伴星に与える影響とそのパラメータ依存性"
  
• SNGRB Workshop 2014
  RIKEN, Aug 2014, No presentation
  
• 44th Summer School of Young Astronomers and Astrophysicists
  Nagano, Jul 2014, Oral "大質量連星系における超新星爆発とその伴星への影響", LOC
  
• Binary Star Workshop
  Kyoto U., Feb 2014, Oral "連星系中の超新星爆発が伴星に与える影響"
  
• Autumn Annual Meeting of the Astronomical Society of Japan
  Tohoku U., Sep 2013, Oral "大質量連星系における超新星爆発が伴星に与える影響"
  
• 43rd Summer School of Young Astronomers and Astrophysicists
  Miyagi, Jul 2013, Oral "大質量連星系における超新星爆発が伴星に与える影響", Chairman
  
• Binary Star Workshop Tokyo
  Keio U., May 2013, No presentation
  
• 42nd Summer School of Young Astronomers and Astrophysicists
  Fukui, Aug 2012, Oral "連星系中の超新星爆発"
  

Seminars

• ABBL-iTHEMS Joint Astro Seminar
  ABBL-iTHEMS, RIKEN (via Zoom), June 2024, "Challenging conventional wisdom in binary evolution"
• RESCEU Seminar
  RESCEU,University of Tokyo, May 2024, "Birth of neutron stars in binary systems"
• Astrophysics Seminar
  Department of Earth Science and Astronomy, University of Tokyo, May 2024, "Birth of neutron stars in binary systems"
• Orange meeting
  Online (Australia), Oct 2023, "Pulsar rocket science"
• Orange meeting
  Online (Australia), May 2023, "Pulsar planets, superluminous supernovae and hypervelocity stars, all in one go"
• Astro Colloquium
  University of Melbourne, Nov 2022, "Violent stellar interactions"
• Astro Seminar
  University of Delaware (via Zoom), Oct 2022, "Violent stellar interactions"
• Informal Seminar
  Heidelberg Institute for Theoretical Studies, Sep 2022, "Violent stellar interactions: collisions and common-envelopes"
• Seminar on Stellar Astrophysics (SESTAS)
  Max Planck Institute for Astrophysics, Sep 2022, "Violent stellar interactions: collisions, common-envelopes and mergers"
• ESO informal discussion
  European Southern Observatory, Sep 2022, "Asymmetric wind-driving in supergiant high-mass X-ray binaries"
• Rikkyo High Energy Astrophysics Colloquium
  Rikkyo University, Mar 2022, "種々の連星相互作用が生み出す大質量星の進化の多様性"
• HEA Colloquium
  ICRR, University of Tokyo, Mar 2022, "Massive binary interactions"
• MQ AAAstro seminar
  Macquarie University (via Zoom), Jun 2021, "Energetic interactions with stellar companions"
• Heidelberg Joint Astronomical Colloquium
  Heidelberg (via Zoom), Apr 2021, "Stellar explosions in multiple systems"
• Astrophysics Seminar
  Technion (via Zoom), Mar 2021, "Simulating the formation of Eta Carinae's surrounding nebula"
• High Energy Astrophysics Seminar
  Hebrew University of Jerusalem (via Zoom), Dec 2020, "Modelling the complicated history of Eta Carinae"
• AP Seminar
  Yukawa Institute + Kyoto University Nuclear Astrophysics group (via Zoom), Nov 2020, "大質量多重連星内における様々な現象"
• Colloquium
  SWIFAR, Yunnan University (via Zoom), Nov 2020, "Impact of supernova explosions on binary companions and its diverse implications"
• Science Colloquium
  NAOJ (via Zoom), Nov 2020, "Impact of supernova explosions on binary companions and its diverse implications"
• Shigeyama-lab seminar
  RESCEU U. Tokyo (via Zoom), May 2020, "The complicated history of Eta Carinae (and Cassiopeia A)"
• Physics Colloquium
  Monash University (via Zoom), Apr 2020, "The complicated history of Eta Carinae"
• Colloquium
  Tohoku University, Nov 2019, "The multiple eruptions of Eta Carinae"
• ISAS Astrophysics Colloquia
  JAXA, Sep 2019, "The origin of Eta Carinae"
• Seminar
  Waseda University, Sep 2019, "The origin of Eta Carinae"
• Colloquium
  University of Tokyo, Sep 2019, "The multiple eruptions of Eta Carinae and its evolution"
• Lunch talk
  KIAA/Peking University, Sep 2019, "The multiple eruptions of Eta Carinae"
• Seminar
  Yunnan National Astronomical Observatory, Sep 2019, "Hydrodynamical simulations of various processes in massive binary systems (and triples!)"
• Astronomy seminar
  University of Sheffield, Apr 2019, "Supernova ejecta-companion interaction and its application"
• Lunch seminar
  Anton Pannekoek Institute, Mar 2019, "Supernova ejecta-companion interaction and its application"
• Informal seminar
  Heidelberg Institute of Theoretical Studies, Mar 2019, "Supernovae in binary systems"
• Nuclear × condensed matter physics seminar
  Chiba Institute of Technology, Dec 2018, "謎多き星イータカリーナはどのように形成されたのか"
• Earth Sciences Seminar
  Oxford U., Oct 2018, "Hyperbolic self-gravity solver and beyond"
• Astrophysics seminar
  Delaware U., Sep 2018, "Supernovae in binary systems"
• Astrophysics colloquium
  Oxford U., Jun 2018, "Supernovae in binaries and the stellar widow/ers"
• SPI-MAX
  Oxford U., Jan 2018, "iPTF13bvn: where is its companion?"
• Seminar
  Albert Einstein Institute@Potsdam-Golm, Dec 2017, "Consequences of Supernovae in Massive Binaries towards the Formation of Double Neutron Star Binaries"
• Stellar Astrophysics group meeting
  Argelander Institute@Bonn, Nov 2017, "Ejecta-companion interaction in massive binaries"
• Colloquium of Theoretical Astronomy Division
  NAOJ, Oct 2017, "Understanding core-collapse supernovae in binaries with various numerical approaches"
• R-ASTRO Seminar
  RIKEN, Oct 2017, "The influence of supernovae on the evolution of binary systems"
• HEA Colloquium
  ICRR U. Tokyo, May 2017, "様々な数値計算手法で探る重力崩壊型超新星爆発"
• Molecule-type Workshop discussion session
  YITP, Jan 2017, "Review on Common Envelope Evolution"
• Kyoto U. Department of Astronomy Seminar
  Kyoto U. Department of Astronomy, Jul 2016, "Hyperbolic Self-Gravity Solver and Beyond"
• Shigeyama lab. Seminar
  RESCEU U. Tokyo, Jan 2016, "大質量連星系内の超新星爆発が伴星へ与える影響とその観測可能性"
• KEK theory seminar
  KEK, Jul 2015, "Ejecta-Companion Interaction in Massive Star Binaries"
• Kyoto U. TAP Colloquium
  Kyoto U. Theoretical Astrophysics group, Jun 2015, "大質量連星系内の超新星爆発が伴星へ与える影響とその観測可能性"
• Kyoto U. Department of Astronomy Seminar
  Kyoto U. Department of Astronomy, Jun 2015, "大質量連星系内の超新星爆発が伴星へ与える影響とその観測可能性"
• Astrophysical BigBang seminar
  RIKEN, Apr 2014, "Supernovae in Massive Binaries and its Impact on the Companion"

Summer Schools

• 2016 MESA Summer School
  UC Santa Barbara, Aug 2016
  
• Autumn School on binary and multiple stars
  National University of Mongolia, Aug 2014
  
• Astrophysical MHD/Plasma Simulation Summer School
  Chiba U., Aug 2013
  
• Summer School "From Quarks to Supernovae"
  Yukawa Institute, Aug 2011

Others

• Yamada lab 20th Anniversary Workshop
  Waseda University, Mar 2024, Oral "Physics of Massive Binaries"
• Monash Science ECN Symposium 2023
  Monash University, Sep 2023, Oral "Eta Carinae -the eccentric life of a superstar-"
• Astronomy Night
  Notting Hill Neighbourhood House, Sep 2023, Oral "The complex lives of stars"
• CAS Free public astronomy lectures
  Swinburne University of Technology, Jun 2022, Oral "Eta Carinae -the eccentric life of a superstar-"
• Melbourne High School: Astronomy Club talk
  Melbourne High School, May 2022, Oral "The Complex Lives of Stars ~how to make gravitational waves~"
• Hikawa High School: Science lab II
  Hikawa High School (via Teams), Aug 2021, Oral "爆発する宇宙 ～爆発系研究者の海外研究生活～"
• Waseda Jitsugyo High School: Graduation memorial lectures
  Waseda Jitsugyo High School (via Zoom), Mar 2021, Oral "アカデミアの世界 ～宇宙物理学者になるまで～"
• 2nd Oxbridge Japanese society + Masason foundation meet-up
  Wolfson college, Oxford, Apr 2019, Oral "宇宙物理学～虚構と現実の狭間で～"
• 6th Cross-disciplinary Meeting of Japanese Young Scientists in Europe
  Fleming's Express Hotel Frankfurt, Aug 2018, Oral "連星系内で起こる様々な爆発現象"
• Early Bird Program, Achievements Report Meeting
  Waseda U., Mar 2016, Oral+Poster "大質量連星系内での超新星爆発によって熱された伴星が引き起こす様々な現象"
• Early Bird Program, 1st Bird Meeting
  Waseda U., Jun 2015, Oral "宇宙物理学とその応用　～他分野との共同研究に向けて～"
• Waseda Jitsugyo High School: Afterschool Enrichment　1st OB/OG Graduate school student lectures
  Waseda Jitsugyo High School, Jun 2015, Oral "連星系と超新星爆発"