Preprints:

Articles in Refereed Journals:

19. Ken'ichiro Nakazato, Eri Mochida, Yuu Niino, and Hideyuki Suzuki;

``Spectrum of the Supernova Relic Neutrino Background and Metallicity Evolution of Galaxies''

The Astrophysical Journal 804 (2015) 75 (15 pages), arXiv:1503.01236 [astro-ph.HE].

The flux data of supernova relic neutrinos computed in this study are here.

18. Ken'ichiro Nakazato;

``Self-organized criticality in a spherically closed cellular automaton: Modeling soft gamma repeater bursts driven by magnetic reconnection''

Physical Review D 90 (2014) 043010 (6 pages), arXiv:1408.1206 [astro-ph.HE].

17. H. Togashi, M. Takano, K. Sumiyoshi, and K. Nakazato;

``Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae''

Progress of Theoretical and Experimental Physics 2014 (2014) 023D05 (19 pages), arXiv:1401.5579 [nucl-th].

16. Tsuyoshi Miyatsu, Sachiko Yamamuro, and Ken'ichiro Nakazato;

``A new equation of state for neutron star matter with nuclei in the crust and hyperons in the core''

The Astrophysical Journal 777 (2013) 4 (10 pages), arXiv:1308.6121 [astro-ph.HE].

The EOS tables computed in this study are here.

15. Ken'ichiro Nakazato;

``Imprint of Explosion Mechanism on Supernova Relic Neutrinos''

Physical Review D 88 (2013) 083012 (5 pages), arXiv:1306.4526 [astro-ph.HE].

14. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Stellar Core Collapse with Hadron-Quark Phase Transition''

Astronomy & Astrophysics 558 (2013) A50 (5 pages), arXiv:1309.3383 [astro-ph.HE].

13. Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Possible Constraints on the Density Dependence of the Nuclear Symmetry Energy from Quasi-periodic Oscillations in Soft Gamma Repeaters''

Monthly Notices of the Royal Astronomical Society 434 (2013) 2060-2068, arXiv:1303.4500 [astro-ph.HE].

12. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, Tomonori Totani, Hideyuki Umeda, and Shoichi Yamada;

``Supernova Neutrino Light Curves and Spectra for Various Progenitor Stars: From Core Collapse to Proto-neutron Star Cooling''

The Astrophysical Journal Supplement 205 (2013) 2 (17 pages), arXiv:1210.6841 [astro-ph.HE].

The supernova neutrino data computed in this study are here.

11. Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Effect of superfluidity on neutron star crustal oscillations''

Monthly Notices of the Royal Astronomical Society: Letters 428 (2013) L21-L25, arXiv:1210.0955 [astro-ph.HE].

10. Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Probing the Equation of State of Nuclear Matter via Neutron Star Asteroseismology''

Physical Review Letters 108 (2012) 201101 (4 pages), arXiv:1202.6242 [astro-ph.HE].

9. Ken'ichiro Nakazato, Shun Furusawa, Kohsuke Sumiyoshi, Akira Ohnishi, Shoichi Yamada, and Hideyuki Suzuki;

``Hyperon Matter and Black Hole Formation in Failed Supernovae''

The Astrophysical Journal 745 (2012) 197 (10 pages), arXiv:1111.2900 [astro-ph.HE].

8. Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Curvature effect on nuclear ``pasta'': Is it helpful for gyroid appearance?''

Physical Review C 83 (2011) 065811 (10 pages), arXiv:1011.3866 [nucl-th].

7. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Impact of Quarks and Pions on Dynamics and Neutrino Signal of Black Hole Formation in Non-rotating Stellar Core Collapse''

The Astrophysical Journal 721 (2010) 1284-1294, arXiv:1001.5084 [astro-ph.HE].

6. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy''

Physical Review D 81 (2010) 083009 (6 pages), arXiv:1004.0291 [astro-ph.HE].

5. Ken'ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada;

``Gyroid Phase in Nuclear Pasta''

Physical Review Letters 103 (2009) 132501 (4 pages), arXiv:0905.2016 [nucl-th].

4. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Oscillation and Future Detection of Failed Supernova Neutrinos from Black Hole Forming Collapse''

Physical Review D 78 (2008) 083014 (14 pages), arXiv:0810.3734 [astro-ph], WU-AP/293/08;

Erratum: ibid. 79 (2009) 069901(E) (1 page).

3. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Astrophysical Implications of Equation of State for Hadron-Quark Mixed Phase: Compact Stars and Stellar Collapses''

Physical Review D 77 (2008) 103006 (12 pages), arXiv:0804.0661 [astro-ph], WU-AP/275/07.

2. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Numerical Study of Stellar Core Collapse and Neutrino Emission: Probing the Spherically Symmetric Black Hole Progenitors with 3-30M_solar Iron Cores''

The Astrophysical Journal 666 (2007) 1140-1151, arXiv:0705.4350 [astro-ph], WU-AP/258/06.

1. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars''

The Astrophysical Journal 645 (2006) 519-533, astro-ph/0509868, WU-AP/233/05.

Proceedings in Refereed Journals:

7. H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, and M. Takano;

``Equation of state for nuclear matter in core-collapse supernovae by the variational method ''

Journal of Physics: Conference Series 569 (2014) 012058 (5 pages).

Proceedings of 3rd International Workshop on ``State of the Art in Nuclear Cluster Physics'' (SOTANCP3), ed. by T. Yamada and Y. Kanada-En'yo.

6. Hajime Togashi, Masatoshi Takano, Kohsuke Sumiyoshi, and Ken'ichiro Nakazato;

``Nuclear equation of state with the variational method and its application to supernova simulations''

International Journal of Modern Physics: Conference Series 29 (2014) 1460221 (9 pages).

Proceedings of the Workshop on Hadron Nuclear Physics (HNP2013), ed. by X.-H. Zhong.

5. Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Constraints on the nuclear symmetry energy via asteroseismology''

Journal of Physics: Conference Series 453 (2013) 012016 (6 pages).

Proceedings of 15th Conference on Recent Developments in Gravity (NEB 15), ed. by T. Papakostas and D.A. Pliakis.

4. Ken'ichiro Nakazato;

``Some Topics on Nuclear Astrophysics and Neutrino Astronomy''

Progress of Theoretical Physics Supplement 186 (2010) 51-56.

Proceedings of YITP International Symposium: New Frontiers in QCD 2010, ed. by A. Ohnishi et al.

3. K. Sumiyoshi, K. Nakazato, C. Ishizuka, A. Ohnishi, S. Yamada, and H. Suzuki;

``Emergence of hyperons in failed supernovae with short neutrino bursts''

Nuclear Physics A835 (2010) 295-302.

Proceedings of 10th International Conference on Hypernuclear and Strange Particle ``Hyp X'', ed. by B.F. Gibson, K. Imai, T. Motoba, T. Nagae and A. Ohnishi.

2. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Stellar Collapse with Hadron-Quark Phase Transition of Hot and Dense Matter''

Progress of Theoretical Physics Supplement 174 (2008) 76-79.

Proceedings of YITP International Symposium: Fundamental Problems in Hot and/or Dense QCD, ed. by T. Kunihiro et al.

1. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars''

Journal of Physics: Conference Series 31 (2006) 205-206.

Proceedings of The Third 21COE Symposium: Astrophysics as Interdisciplinary Science, ed. by K. Maeda, S. Yamada and T. Daishido.

Other Proceedings:

20. H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, M. Takano;

``Nuclear equation of state for core-collapse supernovae with realistic nuclear forces''

PoS(NIC XIII)169 (6 pages),

Proceedings of 13th Symposium on Nuclei in the Cosmos, Proceedings of Science, 2014.

19. Tsuyoshi Miyatsu, Sachiko Yamamuro, Ken'ichiro Nakazato, and Myung-Ki Cheoun;

``Complete equation of state for neutron stars using the relativistic Hartree-Fock approximation''

AIP Conference Proceedings 1594 (2014) 420-425.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG12), ed. by S. Jeong, N. Imai, H. Miyatake, and T. Kajino.

18. Ken'ichiro Nakazato;

``Supernova explosion and black hole formation with hadron-quark phase transition''

AIP Conference Proceedings 1594 (2014) 278-283.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG12), ed. by S. Jeong, N. Imai, H. Miyatake, and T. Kajino.

17. H. Togashi, S. Yamamuro, K. Nakazato, M. Takano, H. Suzuki, and K. Sumiyoshi;

``New Nuclear Equation of State for Core-Collapse Supernovae with the Variational Method''

EPJ Web of Conferences 66 (2014) 07026 (4 pages).

Proceedings of 25th International Nuclear Physics Conference (INPC2013), ed. by S. Lunardi et al.

16. Masatoshi Takano, Hajime Togashi, Sachiko Yamamuro, Ken'ichiro Nakazato, and Hideyuki Suzuki;

``Variational Method for Nuclear Matter with an Explicit Energy Functional''

PoS(NIC XII)236 (6 pages),

Proceedings of 12th Symposium on Nuclei in the Cosmos, ed. by J. Lattanzio, A. Karakas, M. Lugaro and G. Dracoulis, Proceedings of Science, 2012.

15. Hideto Kikuchi, Hideyuki Suzuki, Ken'ichiro Nakazato, Shoichi Yamada, and Kohsuke Sumiyoshi;

``Systematic long term simulations of spherical supernova explosions and their applications''

AIP Conference Proceedings 1484 (2012) 397-399.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG11), ed. by S. Kubono et al.

14. M. Takano, H. Togashi, S. Yamamuro, K. Nakazato, and H. Suzuki;

``Cluster Variational Method for Nuclear Matter with the Three-Body Force''

AIP Conference Proceedings 1484 (2012) 378-380.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG11), ed. by S. Kubono et al.

13. Ken'ichiro Nakazato, and Kohsuke Sumiyoshi;

``The influence of hyperon potential on the black-hole-forming failed supernovae''

AIP Conference Proceedings 1484 (2012) 375-377.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG11), ed. by S. Kubono et al.

12. Ken'ichiro Nakazato, and Kohsuke Sumiyoshi;

``Stellar Core Collapse and Exotic Matter''

IAU Symposium, Volume 279, p. 367-368,

Proceedings of the International Astronomical Union, Death of Massive Stars: Supernovae and Gamma-Ray Bursts, ed. by P.W.A. Roming, N. Kawai and E. Pian, 2012.

11. Ken'ichiro Nakazato, and Kazuhiro Oyamatsu;

``Pasta Phase with Gyroid Morphology at Subnuclear Densities''

PoS(NIC XI)172 (5 pages),

Proceedings of 11th Symposium on Nuclei in the Cosmos, ed. by K. Blaum, N. Christlieb and G. Martinez-Pinedo, Proceedings of Science, 2010.

10. Kohsuke Sumiyoshi, Ken'ichiro Nakazato, Hideyuki Suzuki, and Shoichi Yamada;

``Neutrino burst from failed supernovae as a promising target of neutrino astronomy''

PoS(NIC XI)157 (5 pages),

Proceedings of 11th Symposium on Nuclei in the Cosmos, ed. by K. Blaum, N. Christlieb and G. Martinez-Pinedo, Proceedings of Science, 2010.

9. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Neutrino Astronomy as a Probe into Physics of Hot and Dense Matter''

AIP Conference Proceedings 1269 (2010) 354-356.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG10), ed. by I. Tanihara et al.

8. Ken'ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada;

``Pasta Phase with Gyroid Morphology at Subnuclear Densities''

AIP Conference Proceedings 1238 (2010) 218-221.

Proceedings of Tours Symposium on Nuclear Physics and Astrophysics VII, ed. by H. Susa et al.

7. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Neutrino Astronomy as a Probe into Physics of Hot and Dense Matter''

AIP Conference Proceedings 1238 (2010) 145-150.

Proceedings of Tours Symposium on Nuclear Physics and Astrophysics VII, ed. by H. Susa et al.

6. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Neutrino Emission from Stellar Collapse including Hadron-Quark Mixed Phase''

PoS (NIC X)116 (5 pages),

Proceedings of 10th Symposium on Nuclei in the Cosmos, ed. by S.M. Austin et al., Proceedings of Science, 2008.

5. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Equation of State for Hadron-Quark Mixed Phase and Stellar Collapse''

AIP Conference Proceedings 1016 (2008) 282-287.

Proceedings of Origin of Matter and Evolution of Galaxies (OMEG07), ed. by T. Suda et al.

4. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Neutrino Emission from Stellar Core Collapse and Black Hole Formation''

Proceedings of The 16th Workshop on General Relativity and Gravitation (JGRG16), pp.82-85, ed. by K. Oohara, T. Shiromizu, K. Maeda and M. Sasaki, 2007.

3. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars''

Proceedings of Relativistic Astrophysics and Cosmology - Einstein's Legacy, pp.394-398, ed. by B. Aschenbach, V. Barwitz, G. Hasinger and B. Leibundgut, Springer-Verlag, 2007.

2. Kenta Kiuchi, Ken'ichiro Nakazato, Kei Kotake, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational wave from slightly nonspherical stellar collapse including neutrino effect: Oddparity perturbation''

Proceedings of Relativistic Astrophysics and Cosmology - Einstein's Legacy, pp.79-81, ed. by B. Aschenbach, V. Barwitz, G. Hasinger and B. Leibundgut, Springer-Verlag, 2007.

1. Kenta Kiuchi, Ken'ichiro Nakazato, Kei Kotake, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational wave from realitsic stellar collapse: Odd parity perturbation''

Proceedings of The 15th Workshop on General Relativity and Gravitation (JGRG15), pp.175-178, ed. by T. Shiromizu, H. Yoshino, A. Hosoya, T. Nakamura and M. Sasaki, 2006.

Theses:

2. Ken'ichiro Nakazato;

``Gravitational Collapse and Neutrino Emission of Massive Stars''

Ph.D. thesis (Waseda University), July 2008

1. Ken'ichiro Nakazato;

``Numerical Study on Stellar Core Collapse and Neutrino Emission''

Master thesis (Waseda University), February 2006

Presentations in International Conferences: (as a presenter)

31. Ken'ichiro Nakazato;

``Astrophysical Implications of the Symmetry Energy'' (invited)

Workshop on Science with SpiRIT TPC, Wako, Japan, Jun. 5- 6, 2015.

30. Ken'ichiro Nakazato;

``Supernova Explosion and Black Hole Formation with QCD phase transition'' (invited)

Quarks and Compact Stars, Beijing, China, Oct. 20- 22, 2014.

29. Ken'ichiro Nakazato;

``Stellar core collapse with QCD phase transition'' (invited)

Compact Stars in the QCD Phase diagram IV, Prerow, Germany, Sep. 26- 29, 2014.

28. Ken'ichiro Nakazato;

``Supernova neutrinos and their implications for supernova physics'' (invited)

Multi-Messengers from Core-Collapse Supernovae (MMCOCOS), Fukuoka, Japan, Dec. 2- 6, 2013.

27. Ken'ichiro Nakazato;

``Supernova Explosion and Black Hole Formation with Hadron-Quark Phase Transition'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG12), Tsukuba, Japan, Nov. 18- 22, 2013.

26. Ken'ichiro Nakazato;

``Supernova Neutrino Database'' (poster)

NNN13: International Workshop on Next generation Nucleon Decay and Neutrino Detectors, Kashiwa, Japan, Nov. 11- 13, 2013.

25. Ken'ichiro Nakazato;

``Neutrino emission from stellar core collapse with exotic matter'' (invited)

Workshop on Collapsing Objects, Shanghai, China, Oct. 21- 24, 2013.

24. Ken'ichiro Nakazato;

``Stellar Core Collapse and Exotic Matter'' (invited)

Symposium: `Quarks to Universe in Computational Science (QUCS 2012)', Nara, Japan, Dec. 13- 16, 2012.

23. Ken'ichiro Nakazato, Tomonori Totani, and Hideyuki Suzuki;

``The long term variation of supernova neutrino spectra'' (poster)

The XXV International Conference on Neutrino Physics and Astrophysics (NEUTRINO 2012), Kyoto, Japan, June 3- 9, 2012.

22. Ken'ichiro Nakazato, and Kohsuke Sumiyoshi;

``Stellar Core Collapse and Exotic Matter'' (poster)

IAU Symposium 279 ``Death of Massive Stars: Supernovae and Gamma-Ray Bursts'', Nikko, Japan, Mar. 12- 16, 2012.

21. Ken'ichiro Nakazato;

``Black Hole Formation and Equation of State at Supranuclear Densities'' (talk)

Formations of Compact Objects: from the cradle to the grave, Tokyo, Japan, Mar. 7- 9, 2012.

20. Ken'ichiro Nakazato, and Kohsuke Sumiyoshi;

``The influence of hyperon potential on the black-hole-forming failed supernovae'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG11), Saitama, Japan, Nov. 14- 17, 2011.

19. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Quarks in Failed Supernovae'' (poster)

International Symposium ``From Quarks to Supernovae'', Shizuoka, Japan, Nov. 28- 30, 2010.

18. Ken'ichiro Nakazato, and Kazuhiro Oyamatsu;

``Pasta Phase with Gyroid Morphology at Subnuclear Densities'' (poster)

11th Symposium on Nuclei in the Cosmos, Heidelberg, Germany, Jul. 19- 23, 2010.

17. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Neutrino Astronomy as a Probe into Physics of Hot and Dense Matter'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG10), Osaka, Japan, Mar. 8- 10, 2010.

16. Ken'ichiro Nakazato;

``Nuclear shapes at subnuclear densities: analogy with polymer system'' (talk)

GCOE Symposium: Symmetry Breaking and Quantum Phenomena, Kyoto, Japan, Feb. 15- 17, 2010.

15. Ken'ichiro Nakazato;

``Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy'' (talk)

Seminar talk at ``New Frontiers in QCD 2010'', Kyoto, Japan, Jan. 29, 2010.

14. Ken'ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada;

``Gyroid Phase in Nuclear Pasta'' (talk)

Mini Symposium on Nuclear Astrophysics at ``New Frontiers in QCD 2010'', Kyoto, Japan, Jan. 26, 2010.

13. Ken'ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada;

``Pasta Phase with Gyroid Morphology at Subnuclear Densities'' (poster)

Tours Symposium on Nuclear Physics and Astrophysics VII, Kobe, Japan, Nov. 16- 20, 2009.

12. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Neutrino Astronomy as a Probe into Physics of Hot and Dense Matter'' (talk)

Tours Symposium on Nuclear Physics and Astrophysics VII, Kobe, Japan, Nov. 16- 20, 2009.

11. Ken'ichiro Nakazato, Kazuhiro Oyamatsu, and Shoichi Yamada;

``Gyroid Phase in Nuclear Pasta'' (talk)

Microphysics in Computational Relativistic Astrophysics: MICRA 2009, Copenhagen, Denmark, Aug. 24- 28, 2009.

10. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy'' (talk)

Microphysics in Computational Relativistic Astrophysics: MICRA 2009, Copenhagen, Denmark, Aug. 24- 28, 2009.

9. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, and Shoichi Yamada;

``Oscillation and Future Detection of Failed Supernova Neutrinos from Black Hole Forming Collapse'' (poster)

The 7th RESCEU Symposium on Astroparticle Physics and Cosmology, Tokyo, Japan, Nov. 11- 14, 2008.

8. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Neutrino Emission from Stellar Collapse including Hadron-Quark Mixed Phase'' (poster)

10th Symposium on Nuclei in the Cosmos, Michigan, U.S., Jul. 27- Aug. 1, 2008.

7. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Equation of State for Hadron-Quark Mixed Phase and Stellar Collapse'' (talk)

14th Workshop on ``Nuclear Astrophysics'', Tegernsee, Germany, Mar. 10- 15, 2008.

6. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Equation of State for Hadron-Quark Mixed Phase and Stellar Collapse'' (poster)

YITP International Symposium: Fundamental Problems in Hot and/or Dense QCD, Kyoto, Japan, Mar. 3- 6, 2008.

5. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Equation of State for Hadron-Quark Mixed Phase and Stellar Collapse'' (talk)

Origin of Matter and Evolution of Galaxies (OMEG07), Sapporo, Japan, Dec. 4- 7, 2007.

4. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Neutrino Emission from Stellar Core Collapse and Black Hole Formation'' (poster)

Twenty years after Supernova 1987A, Hawaii, U.S., Feb. 23- 25, 2007.

3. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Neutrino Emission from Stellar Core Collapse and Black Hole Formation'' (talk)

The 16th Workshop on General Relativity and Gravitation (JGRG16), Niigata, Japan, Nov. 27- Dec. 1, 2006.

2. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars'' (talk)

Relativistic Astrophysics and Cosmology - Einstein's Legacy, Munich, Germany, Nov. 7- 11, 2005.

1. Ken'ichiro Nakazato, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars'' (poster)

The Third 21COE Symposium: Astrophysics as Interdisciplinary Science, Tokyo, Japan, Sep. 1- 3, 2005.

Presentations in International Conferences: (NOT as a presenter)

15. Hajime Togashi, Yuta Takehara, Sachiko Yamamuro, Ken'ichiro Nakazato, Hideyuki Suzuki, Kohsuke Sumiyoshi, and Masatoshi Takano;

``Variational study of the supernova equation of state with realistic nuclear forces'' (talk)

Fourth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and The Physical Society of Japan, Hawaii, U.S., Oct. 7- 11, 2014.

14. H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, and M. Takano;

``Nuclear equation of state for core-collapse supernovae with realistic nuclear forces'' (poster)

13th Symposium on Nuclei in the Cosmos, Debrecen, Hungary, July 7- 11, 2014.

13. H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi, and M. Takano;

``Equation of state for nuclear matter in core-collapse supernovae by the variational method'' (talk)

3rd International Workshop on ``State of the Art in Nuclear Cluster Physics'' (SOTANCP3), Yokohama, Japan, May 26- 30, 2014.

12. Tsuyoshi Miyatsu, Sachiko Yamamuro, Ken'ichiro Nakazato, and Myung-Ki Cheoun;

``Complete equation of state for neutron stars using the relativistic Hartree-Fock approximation'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG12), Tsukuba, Japan, Nov. 18- 22, 2013.

11. Hajime Togashi, Masatoshi Takano, Kohsuke Sumiyoshi, and Ken'ichiro Nakazato;

``Nuclear EoS with the variational method and its application to supernova simulations'' (talk)

Workshop on Hadron Nuclear Physics (HNP2013), Zhangjiajie, China, July 18- 22, 2013.

10. H. Togashi, S. Yamamuro, K. Nakazato, M. Takano, H. Suzuki, and K. Sumiyoshi;

``New Nuclear Equation of State for Core-Collapse Supernovae with the Variational Method'' (poster)

25th International Nuclear Physics Conference (INPC2013), Firenze, Italy, July 2- 7, 2013.

9. Masatoshi Takano, Hajime Togashi, Sachiko Yamamuro, Ken'ichiro Nakazato, and Hideyuki Suzuki;

``Variational Method for Nuclear Matter with an Explicit Energy Functional'' (poster)

12th Symposium on Nuclei in the Cosmos, Cairns, Australia, Aug. 5- 10, 2012.

8. Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, and Kazuhiro Oyamatsu;

``Constraints on the nuclear symmetry energy via asteroseismology'' (talk)

15th Conference on Recent Developments in Gravity (NEB 15), Chania, Greece, June 20- 23, 2012.

7. H. Suzuki, H. Kikuchi, M. Kuno, K. Nakazato, K. Sumiyoshi, and S. Yamada;

``Systematic study of supernova neutrino oscillation using outputs of supernova simulations'' (poster)

The XXV International Conference on Neutrino Physics and Astrophysics (NEUTRINO 2012), Kyoto, Japan, June 3- 9, 2012.

6. Hideto Kikuchi, Hideyuki Suzuki, Ken'ichiro Nakazato, Shoichi Yamada, and Kohsuke Sumiyoshi;

``Systematic long term simulations of spherical supernova explosions and their applications'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG11), Saitama, Japan, Nov. 14- 17, 2011.

5. M. Takano, H. Togashi, S. Yamamuro, K. Nakazato, and H. Suzuki;

``Cluster Variational Method for Nuclear Matter with the Three-Body Force'' (poster)

Origin of Matter and Evolution of Galaxies (OMEG11), Saitama, Japan, Nov. 14- 17, 2011.

4. K. Sumiyoshi, K. Nakazato, S. Yamada, and H. Suzuki;

``Neutrino bursts from failed supernovae as a promising target of neutrino astronomy'' (poster)

11th Symposium on Nuclei in the Cosmos, Heidelberg, Germany, Jul. 19- 23, 2010.

3. K. Sumiyoshi, K. Nakazato, C. Ishizuka, A. Ohnishi, S. Yamada, and H. Suzuki;

``Emergence of hyperons in failed supernovae with short neutrino bursts'' (talk)

10th International Conference on Hypernuclear and Strange Particle ``Hyp X'', Ibaraki, Japan, Sep. 14- 18, 2009.

2. Kenta Kiuchi, Ken'ichiro Nakazato, Kotake, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational wave from realitsic stellar collapse: Odd parity perturbation'' (talk)

The 15th Workshop on General Relativity and Gravitation (JGRG15), Tokyo, Japan, Nov. 28- Dec. 2, 2005.

1. Kenta Kiuchi, Ken'ichiro Nakazato, Kei Kotake, Kohsuke Sumiyoshi, and Shoichi Yamada;

``Gravitational wave from slightly nonspherical stellar collapse including neutrino effect: Oddparity perturbation'' (poster)

Relativistic Astrophysics and Cosmology - Einstein's Legacy, Munich, Germany, Nov. 7- 11, 2005.

Seminar Talks:

5. Ken'ichiro Nakazato

``Supernova Neutrino Database and Spectrum of the Supernova Relic Neutrino Background''

at Kamioka Observatory in The University of Tokyo, Kamioka, Japan, Jan. 30, 2014.

4. Ken'ichiro Nakazato

``Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy''

at Theory Center in High Energy Accelerator Research Organization (KEK), Tsukuba, Japan, May 31, 2011.

3. Ken'ichiro Nakazato

``Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy''

at IPMU in The University of Tokyo, Kashiwa, Japan, Jan. 14, 2010.

2. Ken'ichiro Nakazato

``Gyroid Phase in Nuclear Pasta''

at Theoretical Nuclear Physics Laboratory in RIKEN, Wako, Japan, Nov. 25, 2009.

1. Ken'ichiro Nakazato

``Gravitational Collapse and Neutrino Emission of Population III Massive Stars''

at Stellar Hydrodynamics Grope in Max-Planck Institute for Astrophysics, Garching, Germany, Nov. 14, 2005.

Professional Activities:

Referee for The Astrophysical Journal (2007-)

Member of Physical Society of Japan (2006-)

Member of Astronomical Society of Japan (2005-)