Ryosuke Hirai's Homepage

Publications

1. "The Chaotic History of Eta Carinae"
   Ryosuke Hirai
   Proceedings of Stan Fest: Fundamentals of Stellar Outflows: Celebrating and Amplifying the Scientific Life of Stan Owocki, 241-249 (2026)
   
2. "Supernova-induced binary-interaction-powered supernovae: a model for SN2022jli"
   Ryosuke Hirai, Philipp Podsiadlowski, Peter Hoeflich, Maxim V. Barkov, Conrad Chan, David Liptai, Shigehiro Nagataki
   The Astrophysical Journal, Volume 995, Issue 1, id.55, 17 pp. (2025)
   arXiv:2507.09974
3. "Neutron star kicks plus rockets as a mechanism for forming wide low-eccentricity neutron star binaries"
   Ryosuke Hirai, Philipp Podsiadlowski, Alexander Heger, Hiroki Nagakura
   The Astrophysical Journal Letters, Volume 972, Issue 1, id.L18, 8 pp. (2024)
   arXiv:2407.20967
4. "Constraining mass-transfer and common-envelope physics with post-supernova companion monitoring"
   Ryosuke Hirai
   Monthly Notices of the Royal Astronomical Society, Volume 523, Issue 4, pp.6011-6019 (2023)
   arXiv:2304.13864
5. "A two-stage formalism for common-envelope phases of massive stars"
   Ryosuke Hirai, Ilya Mandel
   The Astrophysical Journal Letters, Volume 937, Issue 2, id.L42, 7 pp. (2022)
   arXiv:2209.05328
6. "Neutron stars colliding with binary companions: formation of hypervelocity stars, pulsar planets, bumpy superluminous supernovae and Thorne-Żytkow objects"
   Ryosuke Hirai, Philipp Podsiadlowski
   Monthly Notices of the Royal Astronomical Society, Volume 517, Issue 3, pp.4544-4556 (2022)
   arXiv:2208.00915
7. "Conditions for accretion disc formation and observability of wind-accreting X-ray binaries"
   Ryosuke Hirai, Ilya Mandel
   Publications of the Astronomical Society of Australia, Volume 38, article id. e056 (2021)
   arXiv:2108.03774
8. "Simulating the formation of η Carinae's surrounding nebula through unstable triple evolution and stellar merger-induced eruption"
   Ryosuke Hirai, Philipp Podsiadlowski, Stanley P. Owocki, Fabian R. N. Schneider, Nathan Smith
   Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 3, pp.4276-4296 (2021)
   arXiv:2011.12434
9. "Formation pathway for lonely stripped-envelope supernova progenitors: implications for Cassiopeia A"
   Ryosuke Hirai, Toshiki Sato, Philipp Podsiadlowski, Alejandro Vigna-Gomez, Ilya Mandel
   Monthly Notices of the Royal Astronomical Society, Volume 499, Issue 1, pp.1154-1171 (2020)
   arXiv:2008.05076
10. "Comprehensive study of ejecta-companion interaction for core-collapse supernovae in massive binaries"
    Ryosuke Hirai, Philipp Podsiadlowski, Shoichi Yamada
    The Astrophysical Journal, Volume 864, Issue 2, article id. 119, 17pp. (2018)
    arXiv:1803.10808
11. "The Origin of the Possible Massive Black Hole in the Progenitor System of iPTF13bvn"
    Ryosuke Hirai
    Monthly Notices of the Royal Astronomical Society: Letters, Volume 469, Issue 1, p.L94-L98 (2017)
    arXiv:1704.07663
12. "Formation Scenario of the Progenitor of iPTF13bvn Revisited"
    Ryosuke Hirai
    Monthly Notices of the Royal Astronomical Society, Volume 466, Issue 4, p.3775-3783 (2017)
    arXiv:1612.05666
13. "Hyperbolic Self-Gravity Solver for Large Scale Hydrodynamical Simulations"
    Ryosuke Hirai, Hiroki Nagakura, Hirotada Okawa, Kotaro Fujisawa
    Physical Review D, Volume 93, Issue 8, id.083006 (2016)
    arXiv:1602.05700
    Note: One of the figures was featured in the Physical Review D "Kaleidoscope"!
14. "Possible Signatures of Ejecta-Companion Interaction in iPTF 13bvn"
    Ryosuke Hirai, Shoichi Yamada
    The Astrophysical Journal, Volume 805, Issue 2, article id. 170, 7 pp. (2015)
    arXiv:1504.01845
15. "The Outcome of Supernovae in Massive Binaries; Removed Mass, and its Separation Dependence"
    Ryosuke Hirai, Hidetomo Sawai, Shoichi Yamada
    The Astrophysical Journal, Volume 792, Issue 1, article id. 66, 15 pp. (2014)
    arXiv:1404.4297
16. "Evolution of Massive Main-Sequence Stars in Binary Population Synthesis. II. Consequences for Black Hole High-Mass X-ray Binaries and Binary Black Holes"
    Adam Brček, Ryosuke Hirai, Ilya Mandel, Jack Yutong Chen
    submitted to ApJ
    arXiv:2610.27186
17. "The Kick Velocities of Neutron Stars in Binary Systems"
    Paul Disberg, Ilya Mandel, Ryosuke Hirai
    accepted for publication in ApJ
    arXiv:2608.19690
18. "On Bimodality in the Eccentricity Distribution of Galactic Double Neutron Stars"
    Aldana Grichener, Paul Disberg, Ryosuke Hirai, Ilya Mandel
    submitted to ApJ
    arXiv:2608.00174
19. "The Best Guess: Testing new and old formalisms for the common envelope against observations"
    Riley Thai, Amanda Karakas, Zara Osborn, Robert Izzard, Ryosuke Hirai, Alex Kemp, Simon Campbell
    The Astrophysical Journal, Volume 1010, Issue 1, id.73, 21 pp. (2026)
    arXiv:2607.06333
20. "Dust Formation in Common Envelope Binary Interactions -- III. Lightcurves"
    Chunliang Mu, Orsola De Marco, Luis C. Bermúdez-Bustamante, Ryosuke Hirai, Daniel J. Price, Lionel Siess, Miguel González-Bolívar, Mike Y. M. Lau, Nadejda Blagorodnova
    submitted to MNRAS
    arXiv:2606.26495
21. "From mass-loss histories to lightcurves: a generalised framework for interaction-powered transients"
    Nikhil Sarin, Ryosuke Hirai
    Monthly Notices of the Royal Astronomical Society, Volume 552, Issue 1, id.stag1640, 25 pp. (2026)
    arXiv:2605.19571
22. "Comprehensive neutrino light curves and spectra: from pre-supernova evolution to early supernova phase"
    Chinami Kato, Hiroki Nagakura, Akira Ito, Ryosuke Hirai, Shun Furusawa, Takashi Yoshida, Ryuichiro Akaho
    The Astrophysical Journal Supplement Series, Volume 286, Issue 1, id.17, 35 pp. (2026)
    arXiv:2603.09810
23. "Mass transfer stability for AM CVn binaries with white dwarf donors"
    Lucy O. McNeill, Ryosuke Hirai
    Proceedings of Science, 87th Fujihara Seminar: The 50th Anniversary Workshop of the Disk Instability Model in Compact Binary Stars (DIM50th2025), 46
    arXiv:2512.01377
24. "Weakened Inspirals I: High Mass Ratio Common Envelope Interactions in RGB Stars"
    Jack Nibbs, Orsola De Marco, Lionel Siess, Ryosuke Hirai, Daniel Price
    Publications of the Astronomical Society of Australia, Volume 43, id.e066, 21 pp. (2026)
    arXiv:2512.16225
25. "Evolution of Massive Main-sequence Stars in Rapid Population Synthesis. I. Framework and Implementation"
    Adam Brček, Ryosuke Hirai, Ilya Mandel, Harmony Lower
    The Astrophysical Journal, Volume 1002, Issue 1, id.78, 13 pp. (2026)
    arXiv:2512.13838
26. "Impacts of hydrogen envelope on supernova fallback and the resulting compact remnant masses"
    Kengo Shinoda, Yudai Suwa, Ryosuke Hirai, Ryo Sawada, Kengo Tomida, Kazunari Iwasaki, Takeru K. Suzuki
    Monthly Notices of the Royal Astronomical Society, Volume 552, Issue 1, id.stag1388, 12 pp. (2026)
    arXiv:2512.11404
27. "Delayed Wind Onset in Pa 30, the Remnant of Type Iax SN 1181"
    Takatoshi Ko, Ryosuke Hirai, Taiga Sasaoka, Toshikazu Shigeyama
    Publications of the Astronomical Society of Japan, Volume 78, Issue 2, pp. 645-654, 10 pp. (2026)
    arXiv:2511.14829
28. "Tidal heating in detached double white dwarf binaries"
    Lucy O. McNeill, Ryosuke Hirai
    The Astrophysical Journal, Volume 992, Issue 1, id.154, 18 pp. (2025)
    arXiv:2507.21821
29. "Rapid stellar and binary population synthesis with COMPAS: methods paper II"
    Team COMPAS: Ilya Mandel, Jeff Riley, Adam Boesky, Adam Brcek, Ryosuke Hirai, Veome Kapil, Mike Y. M. Lau, JD Merritt, Nicolás Rodríguez-Segovia, Isobel Romero-Shaw, Yuzhe Song, Simon Stevenson, Avi Vajpeyi, L. A. C. van Son, Alejandro Vigna-Gómez, Reinhold Willcox
    The Astrophysical Journal Supplement Series, Volume 280, Issue 1, id.43, 9 pp. (2025)
    arXiv:2506.02316
30. "Population Synthesis Study on the Binary Origin of Type Ibn Supernovae"
    Takatoshi Ko, Tomoya Kinugawa, Daichi Tsuna, Ryosuke Hirai, Yuki Takei
    Monthly Notices of the Royal Astronomical Society, Vol. 541, Issue 4, pp. 3747-3762 (2025)
    arXiv:2506.00931
31. "Common envelopes in massive stars III: The obstructive role of radiation transport in envelope ejection"
    Mike Y. M. Lau, Ryosuke Hirai, Daniel J. Price, Ilya Mandel, Matthew R. Bate
    Astronomy & Astrophysics, Volume 699, id.A274, 18 pp. (2025)
    arXiv:2503.20506
32. "Precursor Activity Preceding Interacting Supernovae I: Bridging the Gap with SN 2022mop"
    S. J. Brennan, S. Bartmentloo, S. Schulze, K. W. Smith, R. Hirai, J. J. Eldridge, M. Fraser, H. F. Stevance, S. J. Smartt, S. Anand, A. Aryan, T.-W. Chen, K. K. Das, A. J. Drake, C. Fransson, A. Gangopadhyay, A. Gkini, W. V. Jacobson-Galán, A. Jerkstrand, J. Johansson, M. Nicholl, G. Pignata, N. Sarin, A. Singh, J. Sollerman, S. Srivastav, B.F.A. van Baal, K. C. Chambers, M. W. Coughlin, H. Gao, M. J. Graham, M. E. Huber, C.-C. Lin, T. B. Lowe, E. A. Magnier, F. J. Masci, J. Purdum, A. Rest, B. Rusholme, R. Smith, I. A. Smith, J. W. Tweddle, R.J. Wainscoat, T. de Boer
    submitted to A&A
    arXiv:2503.08768
33. "Evidence of non-Solar elemental composition in the clocked bursts from SRGA J144459.2−604207"
    Akira Dohi, Nobuya Nishimura, Ryosuke Hirai, Tomoshi Takeda, Wataru Iwakiri, Toru Tamagawa, Amira Aoyama, Teruaki Enoto, Satoko Iwata, Yo Kato, Takao Kitaguchi, Tatehiro Mihara, Naoyuki Ota, Takuya Takahashi, Sota Watanabe, Kaede Yamasaki
    Publications of the Astronomical Society of Japan, Volume 77, Issue 3, pp.L17-L23 (2025)
    arXiv:2411.10993
34. "NinjaSat monitoring of Type-I X-ray bursts from the clocked burster SRGA J144459.2−604207"
    Tomoshi Takeda, Toru Tamagawa, Teruaki Enoto, Takao Kitaguchi, Yo Kato, Tatehiro Mihara, Wataru Iwakiri, Masaki Numazawa, Naoyuki Ota, Sota Watanabe, Arata Jujo, Amira Aoyama, Satoko Iwata, Takuya Takahashi, Kaede Yamasaki, Chin-Ping Hu, Hiromitsu Takahashi, Akira Dohi, Nobuya Nishimura, Ryosuke Hirai, Yuto Yoshida, Hiroki Sato, Syoki Hayashi, Yuanhui Zhou, Keisuke Uchiyama, Hirokazu Odaka, Tsubasa Tamba, Kentaro Taniguchi
    Publications of the Astronomical Society of Japan, Volume 77, Issue 3, pp.L24-L30 (2025)
    arXiv:2411.10992
35. "Constraining the CSM structure and progenitor mass-loss history of interacting supernovae through 3D hydrodynamic modeling: The case of SN 2014C"
    Salvatore Orlando, Emanuele Greco, Ryosuke Hirai, Tomoki Matsuoka, Marco Miceli, Shigehiro Nagataki, Masaomi Ono, Ke-Jung Chen, Dan Milisavljevic, Daniel Patnaude, Fabrizio Bocchino, Nancy Elias-Rosa
    The Astrophysical Journal, Volume 977, Issue 1, id.118, 35 pp. (2024)
    arXiv:2410.17699
36. "Evolution of the Convective Core Mass during the Main Sequence"
    Minori Shikauchi, Ryosuke Hirai, Ilya Mandel
    The Astrophysical Journal, Volume 984, Issue 2, id.149, 10 pp. (2025)
    arXiv:2409.00460
37. "Bumpy Superluminous Supernovae Powered by Magnetar-star Binary Engine"
    Jin-Ping Zhu, Liang-Duan Liu, Yun-Wei Yu, Ilya Mandel, Ryosuke Hirai, Bing Zhang, Aming Chen
    The Astrophysical Journal Letters, Volume 970, Issue 2, id.L42, 10 pp. (2024)
    arXiv:2405.01224
38. "Fits for the convective envelope mass in massive stars"
    Lewis Picker, Ryosuke Hirai, Ilya Mandel
    The Astrophysical Journal, Volume 969, Issue 1, id.1, 8 pp. (2024)
    arXiv:2402.13180
39. "Expansion of accreting main-sequence stars during rapid mass transfer"
    Mike Y. M. Lau, Ryosuke Hirai, Ilya Mandel, Christopher A. Tout
    The Astrophysical Journal Letters, Volume 966, Issue 1, id.L7, 10 pp. (2024)
    arXiv:2401.09570
40. "Dust formation in common envelope binary interactions -- II: 3D simulations with self-consistent dust formation"
    Luis C. Bermúdez-Bustamante, Orsola De Marco, Lionel Siess, Daniel J. Price, Miguel González-Bolívar, Mike Y. M. Lau, Chunliang Mu, Ryosuke Hirai, Taïssa Danilovich, Mansi M. Kasliwal
    Monthly Notices of the Royal Astronomical Society, Volume 533, Issue 1, pp.464-481 (2024)
    arXiv:2401.03644
41. "Evidence for Evolved Stellar Binary Mergers in Observed B-type Blue Supergiants"
    Athira Menon, Andrea Ercolino, Miguel A. Urbaneja, Daniel J. Lennon, Artemio Herrero, Ryosuke Hirai, Norbert Langer, Abel Schootemeijer, Emmanouil Chatzopoulos, Juhan Frank, Sagiv Shiber
    The Astrophysical Journal Letters, Volume 963, Issue 2, id.L42, 12 pp. (2024)
    arXiv:2311.05581
42. "SN 2022jli: a type Ic supernova with periodic modulation of its light curve and an unusually long rise"
    Moore T., Smartt S.J., Nicholl M., Srivastav S., Stevance H.F., Jess D.B., Grant S.D.T., Fulton M.D., Rhodes L., Sim S.A., Hirai R., Podsiadlowski P., Anderson J.P., Ashall C., Bate W., Fender R., Gutierrez C.P., Howell D.A., Huber M.E., Inserra C., Leloudas G., Monard L.A.G., Muller-Bravo T.E., Shappee B.J., Smith K.W., Terreran G., Tonry J., Tucker M.A., Young D.R., Aamer A., Chen T.-W., Ragosta F., Galbany L., Gromadzki M., Harvey L., Hoeflich P., McCully C., Newsome M., Gonzalez E.P., Pellegrino C., Ramsden P., Perez-Torres M., Ridley E.J., Sheng X., Weston J.
    The Astrophysical Journal Letters, Volume 956, Issue 1, id.L31, 13 pp. (2023)
    arXiv:2309.12750
43. "The Impact of Angular Momentum Loss on the Outcomes of Binary Mass Transfer"
    Reinhold Willcox, Morgan MacLeod, Ilya Mandel, Ryosuke Hirai
    The Astrophysical Journal, Volume 958, Issue 2, id.138, 12 pp. (2023)
    arXiv:2308.06666
44. "Time-independent Simulations of Steady-State Accretion with Nuclear Burning"
    Kaho Tse, Alexander Heger, Ryosuke Hirai, Duncan Galloway
    arXiv:2305.10627
45. "Rapid population synthesis of black-hole high-mass X-ray binaries: implications for binary stellar evolution"
    Isobel M. Romero-Shaw, Ryosuke Hirai, Arash Bahramian, Reinhold Willcox, Ilya Mandel
    Monthly Notices of the Royal Astronomical Society, Volume 524, Issue 1, pp.245-259 (2023)
    arXiv:2303.05375
46. "The Galactic underworld: The spatial distribution of compact remnants"
    David Sweeney, Peter Tuthill, Sanjib Sharma, Ryosuke Hirai
    Monthly Notices of the Royal Astronomical Society, Volume 516, Issue 4, pp.4971-4979 (2022)
    arXiv:2210.04241
47. "Common envelopes in massive stars II: The distinct roles of hydrogen and helium recombination"
    Mike Y. M. Lau, Ryosuke Hirai, Daniel J. Price, Ilya Mandel
    Monthly Notices of the Royal Astronomical Society, Volume 516, Issue 4, pp.4669-4678 (2022)
    arXiv:2206.06411
48. "Common envelope binary interaction simulations between a thermally-pulsating AGB star and a low mass companion"
    Miguel González-Bolívar, Orsola De Marco, Mike Y. M. Lau, Ryosuke Hirai, Daniel J. Price
    Monthly Notices of the Royal Astronomical Society, Volume 517, Issue 3, pp.3181-3199 (2022)
    arXiv:2205.09749
49. "An environment analysis of the Type Ib SN 2019yvr and the possible presence of an inflated binary companion"
    Ning-Chen Sun, Justyn R. Maund, Paul A. Crowther, Ryosuke Hirai, Amir Kashapov, Ji-Feng Liu, Liang-Duan Liu, Emmanouil Zapartas
    Monthly Notices of the Royal Astronomical Society, Volume 510, Issue 3, pp.3701-3715 (2022)
    arXiv:2111.06471
50. "Common envelopes in massive stars: Towards the role of radiation pressure and recombination energy in ejecting red supergiant envelopes"
    Mike Y. M. Lau, Ryosuke Hirai, Miguel González-Bolívar, Daniel J. Price, Orsola De Marco, Ilya Mandel
    Monthly Notices of the Royal Astronomical Society, Volume 512, Issue 4, pp.5462-5480 (2022)
    arXiv:2109.10352
51. "Rapid stellar and binary population synthesis with COMPAS"
    Team COMPAS: Jeff Riley, Poojan Agrawal, Jim W. Barrett, Kristan N. K. Boyett, Floor S. Broekgaarden, Debatri Chattopadhyay, Sebastian M. Gaebel, Fabian Gittins, Ryosuke Hirai, George Howitt, Stephen Justham, Lokesh Khandelwal, Floris Kummer, Mike Y. M. Lau, Ilya Mandel, Selma E. de Mink, Coenraad Neijssel, Tim Riley, Lieke van Son, Simon Stevenson, Alejandro Vigna-Gomez, Serena Vinciguerra, Tom Wagg, Reinhold Willcox
    The Astrophysical Journal Supplement Series, Volume 258, Issue 2, id.34, 30 pp. (2022)
    arXiv:2109.10352
52. "COMPAS: A rapid binary population synthesis suite"
    Team COMPAS: Jeff Riley, Poojan Agrawal, Jim W. Barrett, Kristan N. K. Boyett, Floor S. Broekgaarden, Debatri Chattopadhyay, Sebastian M. Gaebel, Fabian Gittins, Ryosuke Hirai, George Howitt, Stephen Justham, Lokesh Khandelwal, Floris Kummer, Mike Y. M. Lau, Ilya Mandel, Selma E. de Mink, Coenraad Neijssel, Tim Riley, Lieke van Son, Simon Stevenson, Alejandro Vigna-Gomez, Serena Vinciguerra, Tom Wagg, Reinhold Willcox
    Journal of Open Source Software, vol. 7, issue 69, id. 3838 (2022)
    
53. "Stellar core-merger-induced collapse: new formation pathways for black holes, Thorne-Żytkow objects, magnetars, and superluminous supernovae"
    Iminhaji Ablimit, Philipp Podsiadlowski, Ryosuke Hirai, James Wicker
    Monthly Notices of the Royal Astronomical Society, Volume 513, Issue 4, pp.4802-4813 (2022)
    arXiv:2108.08430
54. "Supernova explosions in active galactic nuclei discs"
    Evgeni Grishin, Alexey Bobrick, Ryosuke Hirai, Ilya Mandel, Hagai B. Perets
    Monthly Notices of the Royal Astronomical Society, Volume 507, Issue 1, pp.156-174 (2021)
    arXiv:2105.09953
55. "The observability of inflated companion stars after supernovae in massive binaries"
    Misa Ogata, Ryosuke Hirai, Kotaro Hijikawa
    Monthly Notices of the Royal Astronomical Society, Volume 505, Issue 2, pp.2485-2499 (2021)
    arXiv:2103.10111
56. "Wind mass-loss rates of stripped stars inferred from Cygnus X-1"
    Coenraad J. Neijssel, Serena Vinciguerra, Alejandro Vigna-Gomez, Ryosuke Hirai, James C. A. Miller-Jones, Arash Bahramian, Thomas J. Maccarone, Ilya Mandel
    The Astrophysical Journal, Volume 908, Issue 2, id.118 (2021)
    arXiv:2102.09092
57. "Neutron Star Extreme Matter Observatory: A kilohertz-band gravitational-wave detector in the global network"
    K. Ackley, V. B. Adya, P. Agrawal, P. Altin, G. Ashton, M. Bailes, E. Baltinas, A. Barbuio, D. Beniwal, C. Blair, D. Blair, G. N. Bolingbroke, V. Bossilkov, S. Shachar Boublil, D. D. Brown, B. J. Burridge, J. Calderon Bustillo, J. Cameron, H. Tuong Cao, J. B. Carlin, S. Chang, P. Charlton, C. Chatterjee, D. Chattopadhyay, X. Chen, J. Chi, J. Chow, Q. Chu, A. Ciobanu, T. Clarke, P. Clearwater, J. Cooke, D. Coward, H. Crisp, R. J. Dattatri, A. T. Deller, D. A. Dobie, L. Dunn, P. J. Easter, J. Eichholz, R. Evans, C. Flynn, G. Foran, P. Forsyth, Y. Gai, S. Galaudage, D. K. Galloway, B. Gendre, B. Goncharov, S. Goode, D. Gozzard, B. Grace, A. W. Graham, A. Heger, F. Hernandez Vivanco, R. Hirai, N. A. Holland, Z. J. Holmes, E. Howard, E. Howell, G. Howitt, M. T. Hübner, J. Hurley, C. Ingram, V. Jaberian Hamedan, K. Jenner, L. Ju, D. P. Kapasi, T. Kaur, N. Kijbunchoo, M. Kovalam, R. Kumar Choudhary, P. D. Lasky, M. Y. M. Lau, J. Leung, J. Liu, K. Loh, A. Mailvagan, I. Mandel, J. J. McCann, D. E. McClelland, K. McKenzie, D. McManus, T. McRae, A. Melatos, P. Meyers, H. Middleton, M. T. Miles, M. Millhouse, Y. Lun Mong, B. Mueller, J. Munch, J. Musiov, S. Muusse, R. S. Nathan, Y. Naveh, C. Neijssel, B. Neil, S. W. S. Ng, V. Oloworaran , D. J. Ottaway, M. Page, J. Pan, M. Pathak, E. Payne, J. Powell, J. Pritchard, E. Puckridge, A. Raidani, V. Rallabhandi, D. Reardon, J. A. Riley, L. Roberts, I. M. Romero-Shaw, T. J. Roocke, G. Rowell, N. Sahu, N. Sarin, L. Sarre, H. Sattari, M. Schiworski, S. M. Scott, R. Sengar, D. Shaddock, R. Shannon, J. SHI, P. Sibley, B. J. J. Slagmolen, T. Slaven-Blair, R. J. E. Smith, J. Spollard, L. Steed, L. Strang, H. Sun, A. Sunderland, S. Suvorova, C. Talbot, E. Thrane, D. Töyrä, P. Trahanas, A. Vajpeyi, J. V. van Heijningen, A. F. Vargas, P. J. Veitch, A. Vigna-Gomez, A. Wade, K. Walker, Z. Wang, R. L. Ward, K. Ward, S. Webb, L. Wen, K. Wette, R. Willcox, J. Winterflood, C. Wolf, B. Wu, M. Jet Yap, Z. You, H. Yu, J. Zhang, J. Zhang, C. Zhao, X. Zhu
    Publications of the Astronomical Society of Australia, Volume 37, article id. e047 (2020)
    arXiv:2007.03128
58. "The sensitivity of presupernova neutrinos to stellar evolution models"
    Chinami Kato, Ryosuke Hirai, Hiroki Nagakura
    Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 3, pp.3961-3972 (2020)
    arXiv:2005.03124
59. "A Sub-Solar Metallicity Progenitor for Cassiopeia A, the remnant of a Type IIb Supernova"
    Toshiki Sato, Takashi Yoshida, Shigehiro Nagataki, Masaomi Ono, Keiichi Maeda, Ryosuke Hirai, John P. Hughes, Brian J. Williams, Yoshitomo Maeda
    The Astrophysical Journal, Volume 893, Issue 1, id.49 (2020)
    arXiv:2003.08922
60. "Origins of Type Ibn SNe 2006jc/2015G in interacting binaries and implications for pre-SN eruptions"
    Ning-Chen Sun, Justyn R. Maund, Ryosuke Hirai, Paul A. Crowther, Philipp Podsiadlowski
    Monthly Notices of the Royal Astronomical Society, Volume 491, Issue 4, p.6000-6019 (2020)
    arXiv:1909.07999
61. "Hydrodynamical simulations and similarity relations for eruptive mass loss from massive stars"
    Stanley P. Owocki, Ryosuke Hirai, Philipp Podsiadlowski, Fabian R. N. Schneider
    Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, p.988-1000 (2019)
    arXiv:1902.06220
62. "The W4 method: a new multi-dimensional root-finding scheme for nonlinear systems of equations"
    Hirotada Okawa, Kotaro Fujisawa, Yu Yamamoto, Ryosuke Hirai, Nobutoshi Yasutake, Hiroki Nagakura, Shoichi Yamada
    Applied Numerical Mathematics, Volume 183, p.157-172 (2023)
    arXiv:1809.04495
63. "Formation pathway of Population III coalescing binary black holes through stable mass transfer"
    Kohei Inayoshi, Ryosuke Hirai, Tomoya Kinugawa, Kenta Hotokezaka
    Monthly Notices of the Royal Astronomical Society, Volume 468, Issue 4, p.5020-5032 (2017)
    arXiv:1701.04823
64. "左側通行の国々を巡る研究者の旅"
    平井 遼介
    The Astronomical Herald, Volume 119, Issue 10, p.594-596 (2026)
    
65. "Common envelopes at StanFest"
    Ilya Mandel, Ryosuke Hirai and Lewis Picker
    Fundamentals of Stellar Outflows (StanFest2024) Conference Proceedings (2024)
    arXiv:2412.10691
66. "Dusty Common Envelope Evolution"
    Lionel Siess, Luis C. Bermúdez-Bustamante, Orsola De Marco, Daniel J. Price, Miguel González-Bolívar, Chunliang Mu, Mike Y. M. Lau, Ryosuke Hirai and Taïssa Danilovich
    XIV Torino Workshop on AGB stars Conference Proceedings, Galaxies, Volume 12, Issue 6, id.82 (2024)
    
67. "Post-supernova binary interactions"
    Ryosuke Hirai
    Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 3 - 41st Liège International Astrophysical Colloquium, 206-215 (2024)
    
68. "Roman CCS White Paper: Characterizing the Galactic population of isolated black holes"
    Casey Y. Lam, Natasha Abrams, Jeff Andrews, Etienne Bachelet, Arash Bahramian, David Bennett, Valerio Bozza, Floor Broekgaarden, Sukanya Chakrabarti, William Dawson, Kareem El-Badry, Maya Fishbach, Giacomo Fragione, Scott Gaudi, Abhimat Gautam, Ryosuke Hirai, Daniel Holz, Matthew Hosek Jr., Macy Huston, Tharindu Jayasinghe, Samson Johnson, Daisuke Kawata, Naoki Koshimoto, Jessica R. Lu, Ilya Mandel, Shota Miyazaki, Przemek Mróz, Smadar Naoz, Clément Ranc, Dominick Rowan, Rainer Schödel, Tomer Shenar, Josh Simon, Rachel Street, Takahiro Sumi, Daisuke Suzuki, Sean Terry
    arXiv:2306.12514
69. "Science Cases for the Keck Wide-Field Imager"
    J. Cooke, C. Angus, K. Auchettl, J. Bally, B. Bolin, S. Brough, J. N. Burchett, R. Foley, G. Foran, D. Forbes, J. Gannon, R. Hirai, G. G. Kacprzak, R. Margutti, C. Martinez-Lombilla, U. Mestric, A. Moller, A. Rest, J. Rhodes, R. M. Rich, F. Schussler, R. Wainscoat, J. Walawender, I. Wold, J. Zhang
    arXiv:2207.11698
70. "水素欠乏超新星の親星の起源"
    平井 遼介
    The Astronomical Herald, Volume 111, Issue 9, p.580-588 (2018)
    Note: One of the figures was also used for the cover!