T. Okamoto Publications

Refereed Publications

  1. C. Scannapieco, M. Wadepuhl, O. H. Parry, J. F. Navarro, A. Jenkins, V. Springel, R. Teyssier, E. Carlson, H. M. P. Couchman, R. A. Crain, C. Dalla Vecchia, C. S. Frenk, C. Kobayashi, P. Monaco, G. Murante, T. Okamoto, T. Quinn, J. Schaye, G. S. Stinson, T. Theuns, J. Wadsley, S. D. M. White, R. Woods.
    "The Aquila comparison project: the effects of feedback and numerical methods on simulations of galaxy formation"
    2012, Monthly Notices of the Royal Astronomical Society, in press
  2. A. Tanikawa, K. Yoshikawa, T. Okamoto, K. Nitadori
    "N-body Simulation for Self-Gravitating Collisional Systems with a New SIMD Instruction Set Extension to the x86 Architecture, Advanced Vector Extensions"
    2012, New. A., 17, 2
  3. P. H. Owen, V. R. Eke, C. S. Frenk, T. Okamoto
    "The Baryons in the Milky Way Satellites"
    2012, MNRAS, 419, 3304
  4. T. Okamoto, K. Yoshikawa, M. Umemura
    "ARGOT: Accelerated radiative transfer on grids using oct-tree"
    2012, MNRAS, 419, 2855
  5. H. Matsui, T. R. Saitoh, J. Makino, K. Wada, K. Tomisaka, E. Kokubo, H. Daisaka, Takashi Okamoto, Naoki Yoshida
    "Origin of Multiple Nuclei in Ultraluminous Ifrared Galaxies"
    2012, 746, 26
  6. I. Shimizu, N. Yoshida, T. Okamoto
    "Lyman-alpha Emitters in Cosmological Simulations I: Lyman-alpha Escape Fraction and Statistical Properties at z=3.1"
    2011, MNRAS, 418, 2273
  7. T. Okamoto, C. S. Frenk, A. Jenkins, T. Theuns
    "The properties of satellite galaxies in simulations of galaxy formation"
    2010, MNRAS, 406, 208
  8. P. Bett, V. Eke, C. S. Frenk, A. Jenkins, T. Okamoto
    "The angular momentum of cold dark matter haloes with and without baryons"
    2010, MNRAS, 404, 1137
  9. T. Okamoto, C. S. Frenk
    "The origin of failed subhaloes and the common mass scale of the Milky Way satellite galaxies"
    2009, MNRAS, 399, L174
  10. T. R. Saitoh, H. Daisaka, E. Kokubo, J. Makino, T. Okamoto, K. Tomisaka, K. Wada, N. Yoshida
    "Toward First-Principle Simulations of Galaxy Formation: II. Shock-Induced Starburst at a Collision Interface During the First Encounter of Interacting Galaxies"
    2009, PASJ, 61, 481
  11. T. Okamoto, L. Gao, T. Theuns
    "Mass loss of galaxies due to an ultraviolet background"
    2008, MNRAS, 390, 920
  12. T. R. Saitoh, H. Daisaka, E. Kokubo, J. Makino, T. Okamoto, K. Tomisaka, K. Wada, N. Yoshida
    "Toward First-Principle Simulations of Galaxy Formation: I. How Should We Choose Star Formation Criteria in High-Resolution Simulations of Disk Galaxies?"
    2008, PASJ, 60, 667
  13. J. Zavala, T. Okamoto, C. S. Frenk
    "Bulges versus disks: the evolution of angular momentum in cosmological simulations of galaxy formation"
    2008, MNRAS, 387, 364
  14. T. Okamoto, R. S. Nemmen, R. G. Bower
    "The impact of radio feedback from active galactic nuclei in cosmological simulations: Formation of disk galaxies"
    2008, MNRAS, 385, 161
  15. C. M. Booth, Tom Theuns, T. Okamoto
    "Simulating molecular cloud regulated star formation in galaxies"
    2007, MNRAS, 376, 1588
  16. N. I. Libeskind, S. Cole, C. S. Frenk, T. Okamoto, A. Jenkins
    "Satellite systems around galaxies in hydrodynamic simulations"
    2007, MNRAS, 374, 16L
  17. M. Nagashima, T. Okamoto
    "Type Ia supernovae in a hierarchical galaxy formation model: the Milky Way"
    2006, ApJ, 643, 863
  18. T. R. Saitoh, J. Koda, T. Okamoto, K. Wada, A. Habe
    "Tidal disruption of dark matter halos around proto-globular clusters"
    2006, ApJ, 640, 22
  19. T. Okamoto, V. R. Eke, C. S. Frenk, A. Jenkins
    "The effects of feedback on the morphology of galaxy discs"
    2005, MNRAS, 363, 1299
  20. M. Nagashima, C. G. Lacey, T. Okamoto, C. M. Baugh, C. S. Frenk, S. Cole
    "The metal enrichment of elliptical galaxies in hierarchical galaxy formation models"
    2005, MNRAS Letters, 363, L31
  21. J. Bailin, D. Kawata, B. K. Gibson, M. Steinmetz, J. F. Navarro, C. B. Brook, S. P. D. Gill, R. A. Ibata, A. Knebe, G. F. Lewis, T. Okamoto
    "Internal alignment of the halos of disk galaxies in cosmological hydrodynamic simulations"
    2005, ApJ. 627, L17
  22. T. Kodama, M. Tanaka, T. Tamura, H. Yahagi, M. Nagashima, I. Tanaka, N. Arimoto, T. Futamase, M. Iye, Y. Karasawa, N. Kashikawa, W. Kawasaki, T. Kitayama, H. Matsuhara, F. Nakata, T. Ohashi, K. Ohata, T. Okamoto, S. Okamura, K. Shimasaku, Y. Suto, N. Tamura, K. Umetsu, T. Yamada
    "Panoramic views of cluster-scale assemblies explored by Subaru wide-field imaging"
    2005, PASJ, 57, 309 (astro-ph/0502444 for people can't access to PASJ)
  23. T. Okamoto, A. Jenkins, V.R. Eke, V. Quilis, C.S. Frenk
    "Momentum transfer across shear flows in Smoothed Particle Hydrodynamic simulations of galaxy formation"
    2003, MNRAS, 345, 429
  24. T. Suwa, A. Habe, K. Yoshikawa, T. Okamoto
    "Cluster Morphology as a Test of Different Cosmological Models"
    2003, ApJ, 588, 7
  25. T. Okamoto, M. Nagashima
    "Environmental Effects on Evolution of Cluster Galaxies in a Lambda-dominated Cold Dark Matter Universe"
    2003, ApJ, 587, 500
  26. T. Okamoto, M. Nagashima
    "Morphology-Density Relation for Simulated Clusters of Galaxies in Cold Dark Matter-dominated Universes"
    2001, ApJ, 547, 109
  27. T. Okamoto, A. Habe
    "Evolution of Cluster Galaxies in Hierarchical Clustering Universes"
    2000, PASJ, 52, 457
  28. T. Okamoto, A. Habe
    "Formation and Evolution of Galactic Halos in Clusters of Galaxies"
    1999, ApJ, 516, 591

Proceedings

  1. T. Okamoto, S. Yachi, A. Habe
    'Galaxy Distribution in Clusters of Galaxies '
    1999, in 'Cosmological Parameters and the Evolution of the Universe' ed. Sato K., Kluwer IAU 183, p. 262
  2. T. Okamoto, A. Habe
    'Formation and Evolution of Galactic Halos in Clusters of Galaxies'
    in 'Proceedings of the International Conference on Numerical Astrophysics, Tokyo, Japan, 1998', eds. Miyama S., Tomisaka K., and Hanawa T. Kluwer, 1999. (Astrophysics and space science library ; v. 240), p.57
  3. A. Habe, T. Okamoto
    'Formation and evolution of galactic halos in a cluster of galaxies',
    in 'Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology', Eds. J. Paul, T. Montmerle, & E. Aubourg (CEA Saclay)
  4. T. Okamoto, M. Nagashima
    'Morphology-Density Relation for Simulated Clusters of Galaxies in Cold Dark Matter Dominated Universes'
    in 'Tsukuba International Workshop 'The Physics of the Galaxy Formation',
    eds. Umemura M. and Susa, H., ASP conference series, 2001, p. 149
  5. T. Okamoto, M. Nagashima
    'Environmental Effects on Evolution of Cluster Galaxies'
    in Proceedings of IAU Symp. 208 'Astrophysical Supercomputing using Particle Simulations', eds. Makino J. and Hut, P., (San Francisoco: ASP), pp.435-436
  6. T. Saitou, A. Habe, T. Okamoto
    'Cloud mass function in a gas rich dwarf galaxy',
    in IAU Symp. 208, Astrophysical Supercomputing using Particle Simulations, pp.441-442
  7. T. Suwa, A. Habe, K. Yoshikawa, T. Okamoto 'Substructure of Galaxy Clusters and Cosmological Constant',
    in IAU Symp. 208, Astrophysical Supercomputing using Particle Simulations, pp.447-448
  8. T. Okamoto, M. Nagashima
    'Morphological Evolution of Cluster Galaxies'
    in Proceedings of 'Galaxy Evolution: Theory and Observations',
    RevMexAA (SC), vol 17, eds. V. Avila-Reese, C. Firmani, C.S. Frenk & C. Allen, pp. 98-99
  9. T. Saitou, T. Okamoto, A. Habe
    'Study of Multiphase Interstellar Matter in a Gas Rich Dwarf Galaxy'
    in the Proceedings of the IAU 8th Asian-Pacific Regional Meeting, Vol. II, Eds. S. Ikeuchi, J. Hearnshaw, & T. Hanawa, ASP Conference Series, Vol. 289, pp.289-290
  10. A. Habe, T. Suwa, K. Yoshikawa, T. Okamoto
    'Structure of Clusters of Galaxies and Open CDM and CDM'
    in Studies of Galaxies in the Young Universe with New Generation Telescope, Proceedings of Japan-German Seminar, Eds. N. Arimoto & W. Duschl, 2004, pp.99-106
  11. T. Okamoto, M. Nagashima 'The roles of ram-pressure stripping and minor mergers in the evolution of galaxies'
    in Outskirts of Galaxy Clusters: Intense Life in the Suburbs, ed. A. Diaferio, IAU Colloquium 195, pp.534-538
  12. N. Holliman, C. Baugh, C. Frenk, A. Jenkins, B. Froner, D. Hassaine, J. Helly, N. Metcalfe, T. Okamoto
    'Cosmic Cookery: Making a Stereoscopic 3D Animated Movie'
    in Stereoscopic Displays and Virtual Reality Systems XVII, Proceedings of SPIE-IS & T Electronic Imaging, SPIE Vol. 6055 A, January 2006, ISBN 0-8194-6095-8
  13. M. Nagashima, C. G. Lacey, T. Okamoto, C. M. Baugh, C. S. Frenk, S. Cole
    'The metal enrichment of galaxies and galaxy clusters in the cold dark matter universe'
    in ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology. AIP Conference Proceedings, Volume 847, pp. 442-444 (2006).
  14. T. Okamoto
    'Simulations of coevolving galaxies and supermassive black holes'
    in Mapping the Galaxy and Nearby Galaxies, eds. K. Wada and F. Combs, ASSP Proceedings, p. 367 (Springer: 2007)
  15. T. R. Saitoh, J. Koda, T. Okamoto, K. Wada, A. Habe
    'Tidal Disruption of Dark Matter Halos Around Proto-globular Cluster'
    in Mapping the Galaxy and Nearby Galaxies, eds. K. Wada and F. Combs, ASSP Proceedings, p. 373 (Springer: 2007)
  16. T. Okamoto
    'Galaxy Foramtion'
    in New Horizons in Astronomy: Frank N. Bash Symposium 2007 ASP Conference Series, Vol. 393, proceedings of the conference held 14-16 October 2007 at the University of Texas, Austin, Texas, USA. Edited by Anna Frebel, Justyn R. Maund, Juntai Shen, and Michael H. Siegel. San Francisco: Astronomical Society of the Pacific, 2008., p.111
  17. M. Nagashima, T. Okamoto
    'Chemical Abundance Patterns in the Local Dwarf Galaxies in the CDM Universe'
    in Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399, proceedings of the conference held 11-16 December, 2007, at Shonan Village Center, Hayama, Japan. Edited by Tadayuki Kodama, Toru Yamada, and Kentaro Aoki. San Francisco: Astronomical Society of the Pacific, 2008., p.475
  18. T. Okamoto
    'Dark Satellites of the Milky Way'
    in HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conference Proceedings, Volume 1240, pp. 399-402 (2010)
  19. T. R. Saitoh, H. Daisaka, E. Kokubo, J. Makino, T. Okamoto, K. Tomisaka, K. Wada, N. Yoshida
    "Shock-induced star cluster formation in colliding galaxies"
    Proceedings of IAU Symposium 270, Computational Star Formation (arXiv:1101.3708)

Talks at international conferences

  1. "Galaxy Distribution in Clusters of Galaxies"
    at IAU Symposium 183: Cosmological Parameters and the Evolution of the Universe 18-22, August, 1997, Kyoto, Japan
  2. "Formation and Evolution of Galactic Halos in Clusters of Galaxies"
    at Numerical Astrophysics, 10-13, March, 1998, Tokyo, Japan
  3. "Morphology-Density Relation for Simulated Clusters of Galaxies in Cold Dark Matter Dominated Universes"
    at Tsukuba International Workshop 'The Physics of the Galaxy Formation, 3-7, July, 2000, Tsukuba, Japan
  4. "Environmental Effects on Evolution of Cluster Galaxies"
    at IAU Symp. 208 'Astrophysical Supercomputing using Particle Simulations', 10-13, July, 2001, Tokyo, Japan
  5. "Environmental Effects on Evolution of Cluster Galaxies"
    at A New Era in Cosmology, 11, Sept. 2001, Durham, UK
  6. "Morphological Evolution of Cluster Galaxies"
    at Galaxy Evolution: Theory and Observations, Cozumel, Quintana Roo, Mexico, 8-12 April 2002
  7. "The roles of ram-pressure stripping and minor mergers in the evolution of galaxies"
    in Outskirts of Galaxy Clusters: Intense Life in the Suburbs, 12-16, March, 2004, Torino, Italy
  8. "The effect of feedback on the morphology of galaxy discs" at The formation of the disk galaxies, 21-27, June, 2005, Ascona (Monte Verita) Switzerland
  9. "Simulations of coevolving galaxies and supermassive black holes"
    at Mapping the Galaxy and Nearby Galaxies, 26-30, June, 2006, Ishigaki Island, Okinawa, Japan
  10. Invited review talk on "Galaxy Formation" at Frank N. Bash Symposium 2007: New Horizons in Astronomy, 14-16, Oct, 2007, Texas, Austin.
  11. "Modelling suppression of galaxy formation due to a UV-background"
    at Extragalactic Workshop on "Semi-analytic models - are we kidding ourselves?", 24-25, June 2008, Birmingham, UK.
  12. "Dark Satellites of the Milky Way"
    at HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION, 19-23, Oct 2009, Malta
  13. "Cosmological Disc Galaxy Formation"
    at Galaxies in the Dark, 31 Jly - 4 Aug. 2011, Cafayate, Salta, Argentina
  14. "Shaping galaxies by feedback: satellites, discs, and bulges"
    at Disc Galaxy Formation in a cosmological context, 14-18 May 2012, Heidelberg, Germany
  15. "Cosmological pseudobulge formation"
    at First Stars IV - from Hayashi to the Future -, 21-25 May 2012, Kyoto, Japan

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