Publication in Refereed Journal

1. Parth Bambhaniya, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Arindam Mazumdar, Tomohiro Harada and Ken-ichi Nakao, Eur. Phys. J. C 84 (1/2024) no.2, 124 (7 pages) doi:10.1140/epjc/s10052-024-12477-3 [arXiv:2209.12610 [gr-qc]].
2. Takahisa Igata, Tomohiro Harada, Hiromi Saida and Yohsuke Takamori, “Periapsis shifts in dark matter distribution around a black hole,” Int. J. Mod. Phys. D32(16) 2350105 (2023) (1/2024) (28 pages) doi:10.1142/S0218271823501055 [arXiv:2202.00202 [gr-qc]].
3. Tomohiro Harada, Takahisa Igata, Hiromi Saida and Yohsuke Takamori, “General formulae for the periapsis shift of a quasi-circular orbit in static spherically symmetric spacetimes and the strong energy condition,” Int. J. Mod. Phys. D32(15) 2350098 (12/2023) (20 pages) doi:10.1142/S0218271823500980 [arXiv:2210.07516 [gr-qc]].
4. Tomohiro Harada, Chul-Moon Yoo and Yasutaka Koga, “Revisiting compaction functions for primordial black hole formation,” Phys. Rev. D 108 (8/2023) no.4, 043515 (8 pages) doi:10.1103/PhysRevD.108.043515 [arXiv:2304.13284 [gr-qc]].
5. Daiki Saito, Tomohiro Harada, Yasutaka Koga and Chul-Moon Yoo, “Spins of primordial black holes formed with a soft equation of state,” JCAP 07 (7/2023), 030 (21 pages) doi:10.1088/1475-7516/2023/07/030 [arXiv:2305.13830 [gr-qc]].
6. Tomohiro Harada, Takaaki Ishii, Takuya Katagiri and Norihiro Tanahashi, “Hairy black holes in AdS with Robin boundary conditions,” JHEP 06 (6/2023), 106 doi:10.1007/JHEP06(2023)106 (32 pages) [arXiv:2304.02267 [hep-th]].
7. Ken-Ichi Nakao, Kazumasa Okabayashi and Tomohiro Harada, “Radiative gravastar with thermal spectrum; Sudden vacuum condensation without gravitational collapse,” Phys. Rev. D 107 (4/2023) no.8, 084036 (11 pages) doi:10.1103/PhysRevD.107.084036 [arXiv:2211.13477 [gr-qc]].
8. Tomohiro Harada, Kazunori Kohri, Misao Sasaki, Takahiro Terada and Chul-Moon Yoo, “Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era,” JCAP 02 (2/2023), 038 (27 pages) doi:10.1088/1475-7516/2023/02/038 [arXiv:2211.13950 [astro-ph.CO]].
9. Ken-Ichi Nakao, Kazumasa Okabayashi and Tomohiro Harada, “Radiative gravastar with Gibbons-Hawking temperature,” Phys. Rev. D 106 (11/2022) no.10, 105006 (17 pages) doi:10.1103/PhysRevD.106.105006 [arXiv:2203.14519 [gr-qc]].
10. Yasutaka Koga, Tomohiro Harada, Yuichiro Tada, Shuichiro Yokoyama and Chul-Moon Yoo, “Effective inspiral spin distribution of primordial black hole binaries,” Astrophys. J. 939 (11/2022) no.2, 65 (10 pages) doi:10.3847/1538-4357/ac93f1 [arXiv:2208.00696 [gr-qc]].
11. Takuma Sato, Hideki Maeda and Tomohiro Harada, “Conformally Schwarzschild cosmological black holes,” Class. Quant. Grav. 39 (9/2022) no.21, 215011 (48 pages) [erratum: Class. Quant. Grav. 40 (3/2023) no.7, 079501 (2 pages)] doi:10.1088/1361-6382/ac902f [arXiv:2206.10998 [gr-qc]].
12. Hideki Maeda and Tomohiro Harada, “Criteria for energy conditions,” Class. Quant. Grav. 39 (8/2022) no.19, 195002 (19 pages) doi:10.1088/1361-6382/ac8861 [arXiv:2205.12993 [gr-qc]].
13. Tomohiro Harada, Hideki Maeda and Takuma Sato, “Thakurta metric does not describe a cosmological black hole,” Phys. Lett. B 833 (7/2022), 137332 (5 pages) doi:10.1016/j.physletb.2022.137332 [arXiv:2106.06651 [gr-qc]].
14. Tomohiro Harada, Takahisa Igata, Takuma Sato and Bernard Carr, “Complete classification of Friedmann-Lemaître-Robertson-Walker solutions with linear equation of state: parallelly propagated curvature singularities for general geodesics”, Class. Quant. Grav. 39 (7/2022) 145008 (23 pages) [arXiv:2110.13421 [gr-qc]].
15. Chul-Moon Yoo, Tomohiro Harada, Shin'ichi Hirano, Hirotada Okawa and Misao Sasaki, “Primordial black hole formation from massless scalar isocurvature,” Phys. Rev. D 105 (5/2022) no.10, 103538 doi:10.1103/PhysRevD.105.103538 (11 pages) [arXiv:2112.12335 [gr-qc]].
16. Kazumasa Okabayashi, Tomohiro Harada and Ken-ichi Nakao, “Robustness of particle creation in the formation of a compact object,” PTEP 2022 (2/2022) no.2, 023E02 (18 pages) doi:10.1093/ptep/ptac006 [arXiv:2107.05260 [gr-qc]].
17. Chul-Moon Yoo, Tomohiro Harada, Shin'ichi Hirano and Kazunori Kohri, “Abundance of Primordial Black Holes in Peak Theory for an Arbitrary Power Spectrum,” PTEP 2021 (10/2021) no.1, 013E02 (17 pages), doi:10.1093/ptep/ptaa155 [arXiv:2008.02425 [astro-ph.CO]].
18. Masashi Kimura, Tomohiro Harada, Atsushi Naruko and Kenji Toma, “Backreaction of Mass and Angular Momentum Accretion on Black Holes: General Formulation of the Metric Perturbations and Application to the Blandford-Znajek Process,” PTEP 2021 (8/2021) no.9, 9 (26 pages) doi:10.1093/ptep/ptab101 [arXiv:2105.05581 [gr-qc]].
19. Takuya Katagiri and Tomohiro Harada, “Stability of small charged anti-de Sitter black holes in the Robin boundary,” Class. Quant. Grav. 38 (6/2021), 13 (39 pages) doi:10.1088/1361-6382/abfed6 [arXiv:2006.10301 [gr-qc]].
20. S. Kawamura, M. Ando, N. Seto, S. Sato, M. Musha, I. Kawano, J. Yokoyama, T. Tanaka, K. Ioka and T. Akutsu, et al. “Current status of space gravitational wave antenna DECIGO and B-DECIGO,” PTEP 2021 (2/2021) no.5, 05A105 doi:10.1093/ptep/ptab019 [arXiv:2006.13545 [gr-qc]].
21. Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri, Yasutaka Koga and Takeru Monobe, “Spins of primordial black holes formed in the radiation-dominated phase of the universe: first-order effect,” Astrophys. J. 908 (2/2021) no.2, 140 (9 pages) doi:10.3847/1538-4357/abd9b9 [arXiv:2011.00710 [astro-ph.CO]].
22. R. Allahverdi, M. A. Amin, A. Berlin, N. Bernal, C. T. Byrnes, M. S. Delos, A. L. Erickcek, M. Escudero, D. G. Figueroa, K. Freese, T. Harada, D. Hooper, D. I. Kaiser, T. Karwal, K. Kohri, G. Krnjaic, M. Lewicki, K. D. Lozanov, V. Poulin, K. Sinha, T. L. Smith, T. Takahashi, T. Tenkanen, J. Unwin, V. Vaskonen and S. Watson, “The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe,” Open J. Astrophys. Vol. 4 (1/2021) (64 pages), doi:10.21105/astro.2006.16182 [arXiv:2006.16182 [astro-ph.CO]].
23. Kenta Hioki and Tomohiro Harada, “Dynamical Transition from a Naked Singularity to a Black Hole,” Int. J. Mod. Phys. A 35 (11/2020) no.31, 2050201 (10 pages), doi:10.1142/S0217751X20502012 [arXiv:1909.07852 [gr-qc]].
24. Takafumi Kokubu and Tomohiro Harada, “Thin-shell wormholes in Einstein and Einstein-Gauss-Bonnet theories of gravity,” Universe 6 (10/2020), 197 (40 pages), doi:10.3390/universe6110197 [arXiv:2002.02577 [gr-qc]].
25. Masataka Tsuchiya, Chul-Moon Yoo, Yasutaka Koga and Tomohiro Harada, “Sonic Point and Photon Surface,” Phys. Rev. D 102 (8/2020) no.4, 044057 (18 pages), doi:10.1103/PhysRevD.102.044057 [arXiv:2003.10125 [gr-qc]].
26. Chul-Moon Yoo, Tomohiro Harada and Hirotada Okawa, “Threshold of Primordial Black Hole Formation in Nonspherical Collapse,” Phys. Rev. D 102 (8/2020) no.4, 043526 [erratum: Phys. Rev. D 107 (2023) no.4, 049901] doi:10.1103/PhysRevD.102.043526 [arXiv:2004.01042 [gr-qc]].
27. Mandar Patil and Tomohiro Harada, “Extremal Kerr white holes as a source of ultra high energy particles,” Phys. Rev. D 102 (7/2020) no.2, 024002 (11 pages), doi:10.1103/PhysRevD.102.024002 [arXiv:2004.12874 [gr-qc]].
28. Tomohiro Harada and Maximilian Thaller, “Uniqueness of static, isotropic low-pressure solutions of the Einstein-Vlasov system,” Lett. Math. Phys. 110(5) (3/2020) (15 pages), https://doi.org/10.1007/s11005-020-01284-y, [arXiv:1806.10539 [gr-qc]].
29. Kota Ogasawara, Takahisa Igata, Tomohiro Harada and Umpei Miyamoto, “Escape probability of a photon emitted near the black hole horizon,” Phys. Rev. D 101 (2/2020) no.4, 044023 doi:10.1103/PhysRevD.101.044023 [arXiv:1910.01528 [gr-qc]].
30. Takafumi Kokubu and Tomohiro Harada, “Bursts of particle creation in gravitational collapse to a horizonless compact object,” Phys. Rev. D 100 (10/2019) no.8, 084028 (16 pages) doi:10.1103/PhysRevD.100.084028 [arXiv:1905.07981 [gr-qc]].
31. Yasutaka Koga and Tomohiro Harada, “Stability of null orbits on photon spheres and photon surfaces,” Phys. Rev. D 100 (9/2019) no.6, 064040 (7 pages), doi:10.1103/PhysRevD.100.064040 [arXiv:1907.07336 [gr-qc]].
32. Tomohiro Harada, Vitor Cardoso and Daiki Miyata, “Particle creation in gravitational collapse to a horizonless compact object,” Phys. Rev. D 99 (4/2019) no.4, 044039 (13 pages) doi:10.1103/PhysRevD.99.044039 [arXiv:1811.05179 [gr-qc]].
33. Ken-ichi Nakao, Chul-Moon Yoo and Tomohiro Harada, “Gravastar formation: What can be the evidence of a black hole?,” Phys. Rev. D 99 (2/2019) no.4, 044027 (22 pages) doi:10.1103/PhysRevD.99.044027 [arXiv:1809.00124 [gr-qc]].
34. S. Kawamura, T. Nakamura, M. Ando, N. Seto, T. Akutsu, I. Funaki, K. Ioka, N. Kanda, I. Kawano and M. Musha, et al. “Space gravitational-wave antennas DECIGO and B-DECIGO,” Int. J. Mod. Phys. D 28 (2019) no.12, 1845001 doi:10.1142/S0218271818450013
35. Takafumi Kokubu, Koutaro Kyutoku, Kazunori Kohri and Tomohiro Harada, “Effect of Inhomogeneity on Primordial Black Hole Formation in the Matter Dominated Era,” Phys. Rev. D 98 (12/2018) no.12, 123024 (12 pages) doi:10.1103/PhysRevD.98.123024 [arXiv:1810.03490 [astro-ph.CO]].
36. Chul-Moon Yoo, Tomohiro Harada, Jaume Garriga and Kazunori Kohri, “Primordial black hole abundance from random Gaussian curvature perturbations and a local density threshold,” PTEP 2018 (12/2018) no.12, 123 (29 pages) doi:10.1093/ptep/pty120 [arXiv:1805.03946 [astro-ph.CO]].
37. Yasutaka Koga and Tomohiro Harada, “Rotating accretion flows in D dimensions: sonic points, critical points and photon spheres,” Phys. Rev. D 98 (7/2018) no.2, 024018 (8 pages) doi:10.1103/PhysRevD.98.024018 [arXiv:1803.06486 [gr-qc]].
38. Takafumi Kokubu, Sanjay Jhingan and Tomohiro Harada, “Energy emission from a high curvature region and its backreaction,” Phys. Rev. D 97 (5/2018) no.10, 104014 (11 pages) doi:10.1103/PhysRevD.97.104014 [arXiv:1712.05502 [gr-qc]].
39. Tomohiro Harada, Bernard J. Carr and Takahisa Igata, “Complete conformal classification of the Friedmann-Lemaitre-Robertson-Walker solutions with a linear equation of state,” Class. Quant. Grav. 35 (4/2018) no.10, 105011 (27 pages) doi:10.1088/1361-6382/aab99f [arXiv:1801.01966 [gr-qc]].
40. Ken-ichi Nakao, Pankaj S. Joshi, Jun-Qi Guo, Prashant Kocherlakota, Hideyuki Tagoshi, Tomohiro Harada, Mandar Patil, Andrzej Krolak, “On the stability of a superspinar”, Phys. Lett. B 780 (3/2018) 410 (4 pages) doi:10.1016/j.physletb.2018.03.014 [arXiv:1707.07242 [gr-qc]].
41. Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri and Ken-Ichi Nakao, “Spins of primordial black holes formed in the matter-dominated phase of the Universe,” Phys. Rev. D 96 (10/2017), 083517 (16 pages) doi:10.1103/PhysRevD.96.083517 [arXiv:1707.03595 [gr-qc]].
42. Kota Ogasawara, Tomohiro Harada, Umpei Miyamoto and Takahisa Igata “Escape probability of the super-Penrose process,” Phys. Rev. D 95 (6/2017) no.12, 124019 (5 pages) doi:10.1103/PhysRevD.95.124019 [arXiv:1609.03022 [gr-qc]].
43. Chul-Moon Yoo, Tomohiro Harada and Hirotada Okawa, “3D Simulation of Spindle Gravitational Collapse of a Collisionless Particle System,” Class. Quant. Grav. 34 (4/2017), 105010 (17 pages), doi:10.1088/1361-6382/aa6ad5 [arXiv:1611.07906 [gr-qc]].
44. Naoki Tsukamoto and Tomohiro Harada, “Light curves of light rays passing through a wormhole,” Phys. Rev. D 95 (1/2017) no.2, 024030 (14 pages) doi:10.1103/PhysRevD.95.024030 [arXiv:1607.01120 [gr-qc]].
45. Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri, Ken-ichi Nakao and Sanjay Jhingan, “Primordial black hole formation in the matter-dominated phase of the Universe,” Astrophys. J. 833 (12/2016) no.1, 61 (8 pages), doi:10.3847/1538-4357/833/1/61 [arXiv:1609.01588 [astro-ph.CO]].
46. Takahisa Igata, Tsuyoshi Houri and Tomohiro Harada, “Self-similar motion of a Nambu-Goto string,” Phys. Rev. D 94 (9/2016) no.6, 064029 (10 pages) doi:10.1103/PhysRevD.94.064029 [arXiv:1608.03698 [gr-qc]].
47. Tomohiro Harada and Sanjay Jhingan, “Spherical and nonspherical models of primordial black hole formation: exact solutions,” Prog.Theor.Exp.Phys. (9/2016) 093E04 (27 pages) doi:10.1093/ptep/ptw123 [arXiv:1512.08639 [gr-qc]].
48. Yasutaka Koga and Tomohiro Harada, “Correspondence between sonic points of ideal photon gas accretion and photon spheres,” Phys. Rev. D 94 (8/2016) no.4, 044053 (6 pages) doi:10.1103/PhysRevD.94.044053 [arXiv:1601.07290 [gr-qc]].
49. Tomohiro Harada, Kota Ogasawara and Umpei Miyamoto, “Consistent analytic approach to the efficiency of collisional Penrose process,” Phys. Rev. D 94(2) (7/2016) 024038 (5 pages), doi:10.1103/PhysRevD.94.024038 [arXiv:1606.08107 [gr-qc]].
50. Tomohiro Harada, Shunichiro Kinoshita and Umpei Miyamoto, “Vacuum excitation by sudden appearance and disappearance of a Dirichlet wall in a cavity,” Phys. Rev. D 94 (7/2016) no.2, 025006 (17 pages), doi:10.1103/PhysRevD.94.025006 [arXiv:1601.01172 [hep-th]].
51. Mandar Patil, Tomohiro Harada, Ken-Ichi Nakao, Pankaj S. Joshi and Masashi Kimura, “Infinite efficiency of the collisional Penrose process: Can a overspinning Kerr geometry be the source of ultrahigh-energy cosmic rays and neutrinos?,” Phys. Rev. D 93 (5/2016) no.10, 104015 (28 pages), doi:10.1103/PhysRevD.93.104015 [arXiv:1510.08205 [gr-qc]].
52. Kota Ogasawara, Tomohiro Harada and Umpei Miyamoto, “High efficiency of collisional Penrose process requires heavy particle production,” Phys. Rev. D 93 (2/2016) no.4, 044054 (9 pages), doi:10.1103/PhysRevD.93.044054 [arXiv:1511.00110 [gr-qc]].
53. Takafumi Kokubu, Hideki Maeda and Tomohiro Harada, “Does the Gauss-Bonnet term stabilize wormholes?,” Class. Quant. Grav. 32 (11/2015) 23, 235021 (30 pages), doi:10.1088/0264-9381/32/23/235021 [arXiv:1506.08550 [gr-qc]].
54. Takafumi Kokubu and Tomohiro Harada, “Negative tension branes as stable thin shell wormholes,” Class. Quant. Grav. 32 (9/2015) no.20, 205001 (20 pages), doi:10.1088/0264-9381/32/20/205001 [arXiv:1411.5454 [gr-qc]].
55. Mandar Patil, Pankaj S. Joshi, Ken-ichi Nakao, Masashi Kimura and Tomohiro Harada, “Timescale for trans-Planckian collisions in Kerr spacetime,” Europhys. Lett. 110 (5/2015) no.3, 30004 (6 pages), doi:10.1209/0295-5075/110/30004 [arXiv:1503.08331 [gr-qc]].
56. Tomohiro Harada, Chul-Moon Yoo, Tomohiro Nakama and Yasutaka Koga, “Cosmological long-wavelength solutions and primordial black hole formation,” Phys. Rev. D 91 (4/2015) 8, 084057 (25 pages).
57. B. J. Carr and Tomohiro Harada, “The separate universe problem: 40 years on”, Phys. Rev. D 91 (4/2015) 8, 084048 (16 pages).
58. Ken-Ichi Nakao, Masashi Kimura, Tomohiro Harada, Mandar Patil and Pankaj S. Joshi, “How small can an over-spinning body be in general relativity?,” Phys. Rev. D 90 (12/2014) 12, 124079 (15 pages). [arXiv:1406.6798 [gr-qc]].
59. Tomohiro Harada and Masashi Kimura, “Black holes as particle accelerators: a brief review,” Class. Quant. Grav. 31 (11/2014) 243001 (invited, 17 pages). [arXiv:1409.7502 [gr-qc]].
60. Tomohiro Nakama, Tomohiro Harada, A. G. Polnarev and Jun'ichi Yokoyama, “Identifying the most crucial parameters of the initial curvature profile for primordial black hole formation,” JCAP01(2014)037 (25 pages) (1/2014). [arXiv:1310.3007 [gr-qc]].
61. Naoki Tsukamoto, Masashi Kimura and Tomohiro Harada, “High Energy Collision of Particles in the Vicinity of Extremal Black Holes in Higher Dimensions: Banados-Silk-West Process as Linear Instability of Extremal Black Holes,” Phys. Rev. D 89 (1/2014) 024020 (18 pages). [arXiv:1310.5716 [gr-qc]].
62. Naoki Tsukamoto and Tomohiro Harada, “A No-Go Theorem for Rotating Stars of a Perfect Fluid without Radial Motion in Projectable Hořava-Lifshitz Gravity”, Galaxies 2013(1), 261-274 (12/2013).
63. Tomohiro Harada, Chul-Moon Yoo and Kazunori Kohri, “Threshold of primordial black hole formation”, Phys. Rev. D88(8), 084051 (10/2013) (10 pages).
64. Hiroya Nemoto, Umpei Miyamoto, Tomohiro Harada and Takafumi Kokubu, “Escape of superheavy and highly energetic particles produced by particle collisions near maximally charged black holes”, Phys. Rev. D87(12), 127502 (6/2013) (4 pages).
65. Umpei Miyamoto, Sanjay Jhingan and Tomohiro Harada, “Weak cosmic censorship in gravitational collapse with astrophysical parameter values,” Prog. Theor. Exp. Phys. 2013(5), 053E1 (5/2013).
66. Chul-Moon Yoo, Tomohiro Harada and Naoki Tsukamoto, “Wave Effect in Gravitational Lensing by the Ellis Wormhole,”, Phys. Rev. D87(8), 084045 (4/2013) (9 pages).
67. Tomohiro Harada and Sanjay Jhingan, “Renormalization group approach to Einstein-Rosen waves,” Phys. Rev. D87(6), 064043 (3/2013) (7 pages).
68. Naoki Tsukamoto and Tomohiro Harada, “Signed magnification sums for general spherical lenses,” Phys. Rev. D 87(2), 024024 (1/2013) (6 pages).
69. Naoki Tsukamoto, Tomohiro Harada and Kohji Yajima, “Can we distinguish between black holes and wormholes by their Einstein ring systems?,” Phys. Rev. D 86(10), 104062 (11/2012) (6 pages).
70. Tomohiro Harada, Hiroya Nemoto and Umpei Miyamoto, “Upper limits of particle emission from high-energy collision and reaction near a maximally rotating Kerr black hole”, Phys. Rev. D86(2), 024027 (7/2012) (10 pages), Erratum-ibid. D 86, 069902 (9/2012) (1 p).
71. Takahisa Igata, Tomohiro Harada and Masashi Kimura, “Effect of a weak electromagnetic field on particle acceleration by a rotating black hole”, Phys. Rev. D85(10), 104028 (5/2012) (11 pages).
72. Tomohiro Harada and Masashi Kimura, “Collision of an object in the transition from adiabatic inspiral to plunge around a Kerr black hole”, Phys. Rev. D84(12), 124032 (12/2011) (8 pages).
73. Tomo Tanaka, Fumitoshi Amemiya, Masahiro Shimano, Tomohiro Harada and Takashi Tamaki, “Discretisation parameter and operator ordering in loop quantum cosmology with the cosmological constant”, Phys. Rev. D83(10), 104049 (5/2011) (14 pages).
74. Seiji Kawamura et al. (31th among 145 authors), “The Japanese space gravitational wave antenna: DECIGO”, Class. Quantum Grav. 28(9), 094011 (4/2011) (12 pages).
75. Tomohiro Harada and Masashi Kimura, “Collision of two general geodesic particles around a Kerr black hole”, Phys. Rev. D83(8), 084041 (4/2011) (9 pages).
76. Tomohiro Harada and Masashi Kimura, “Collision of an innermost stable circular orbit particle around a Kerr black hole”, Phys. Rev. D83(2), 024002 (1/2011) (11 pages).
77. Tomohiro Harada, Umpei Miyamoto and Naoki Tsukamoto, “Uniqueness of static spherically symmetric vacuum solutions in the IR limit of Hořava-Lifshitz gravity”, Int. J. Mod. Phys. D20(1), 111-118 (1/2011) (8 pages).
78. Ken-ichi Nakao, Tomohiro Harada and Umpei Miyamoto, “Visible borders of spacetime generated by high-energy collisions”, Phys. Rev. D82(12), 121501(R) (12/2010) (4 pages).
79. B.J. Carr, Tomohiro Harada and Hideki Maeda, “Can a primordial black hole or wormhole grow as fast as the universe?”, Class. Quant. Grav. 27(18), 183101 (8/2010) (28 pages). (invited)
80. Cosimo Bambi, Tomohiro Harada, Rohta Takahashi and Naoki Yoshida, “Outflows from accreting super-spinars”, Phys. Rev. D81(10), 104004 (5/2010) (12 pages).
81. Masaki Ando et al. (28th among 140 authors), “DECIGO and DECIGO pathfinder”, Class. Quant. Grav. 27(8), 084010 (4/2010) (10 pages).
82. Rohta Takahashi and Tomohiro Harada, “Observational Testability of Kerr bound in X-ray Spectrum of Black-Hole Candidates”, Class. Quant. Grav. 27(7), 075003 (3/2010) (21 pages).
83. Cosimo Bambi, Katherine Freese, Tomohiro Harada, Rohta Takahashi and Naoki Yoshida, “Accretion process onto super-spinning objects”, Phys. Rev. D80(10), 104023 (11/2009) (10 pages).
84. Masahiro Shimano and Tomohiro Harada, “Observational constraints on a power spectrum from super-inflation in Loop Quantum Cosmology”, Phys. Rev. D80(6), 063538 (9/2009) (17 pages).
85. Masaki Ando et al. (33rd among 136 authors), “DECIGO pathfinder,” Class. Quant. Grav. 26 (4/2009) 094019. doi:10.1088/0264-9381/26/9/094019
86. Ken-ichi Nakao, Tomohiro Harada, Yasunari Kurita and Yoshiyuki Morisawa, “Relativistic Gravitational Collapse of a Cylindrical Shell of Dust II: Settling Down Boundary Condition”, Prog. Theor. Phys. 122(2), 521-541 (8/2009).
87. Tomohiro Harada, Ken-ichi Nakao and Brien C. Nolan, “Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry”, Phys. Rev. D80(2), 024025 (7/2009) (15 pages), Erratum-ibid. D80(10), 109903 (7/2009) (1 p).
88. Hideki Maeda, Tomohiro Harada and B. J. Carr, “Cosmological wormholes”, Phys. Rev. D79(4), 044034 (2/2009) (10 pages).
89. Zahid Ahmed, Tomohiro Harada, Ken-ichi Nakao and M. Sharif, “High-Speed Collapse of a Hollow Sphere of Type I Matter”, Class. Quantum Grav. 26(3), 035007 (1/2009) (15 pages).
90. Martin Bojowald, Tomohiro Harada and Rakesh Tibrewala, “Lemaitre-Tolman-Bondi collapse from the perspective of loop quantum gravity”, Phys. Rev. D78(6), 064057 (9/2008) 064057 (30 pages).
91. Masanori Kyo, Tomohiro Harada and Hideki Maeda, “Asymptotically Friedmann self-similar scalar field solutions with potential”, Phys. Rev. D77(12), 124036 (6/2008) (10 pages).
92. Hideki Maeda, Tomohiro Harada and B. J. Carr, “Self-similar cosmological solutions with dark energy II: black holes, naked singularities and wormholes”, Phys. Rev. D77(2), 024023 (1/2008) (12 pages).
93. Tomohiro Harada, Hideki Maeda and B. J. Carr, “Self-similar cosmological solutions with dark energy I: formulation and asymptotic analysis”, Phys. Rev. D77(2), 024022 (1/2008) (13 pages).
94. Ashutosh Mahajan, Tomohiro Harada , Pankaj S. Joshi and Ken-ichi Nakao, “Critical Collapse of Einstein Cluster”, Prog. Theor. Phys. 118(5), 865-878 (11/2007).
95. Hiromi Saida, Tomohiro Harada and Hideki Maeda, “Black Hole Evaporation in an Expanding Universe”, Class. Quantum Grav. 24(18), 4711-4732 (9/2007).
96. Tomohiro Harada and Ashutosh Mahajan, “Analytical solutions for black-hole critical behaviour”, Gen. Rel. Grav. 39(11), 1847-1854 (8/2007).
97. Ken-ichi Nakao, Yasunari Kurita, Yoshiyuki Morisawa and Tomohiro Harada , “Relativistic Gravitational Collapse of Cylindrical Dust”, Prog. Theor. Phys. 117(1), 75-102 (1/2007).
98. Tomohiro Harada , “Is there a black hole minimum mass?”, Phys. Rev. D74(8), 084004 (10/2006) (4 pages).
99. Tomohiro Harada , Hideki Maeda and B. J. Carr, “Non-existence of self-similar solutions containing a black hole in a universe with a stiff fluid or scalar field or quintessence”, Phys. Rev. D74(2), 024024 (7/2006) (17 pages).
100. Tomohiro Harada and B. J. Carr, “Super-horizon primordial black holes”, Phys. Rev. D72(4), 044021 (8/2005) (12 pages).
101. Tomohiro Harada and B. J. Carr, “Growth of primordial black holes in a universe containing a massless scalar field”, Phys. Rev. D71(10), 104010 (5/2005) (16 pages).
102. Tomohiro Harada and B. J. Carr, “Upper limits on the size of a primordial black hole”, Phys. Rev. D71(10), 104009 (5/2005) (9 pages).
103. Hideki Maeda, Takashi Torii and Tomohiro Harada, “Novel Cauchy horizon instability”, Phys. Rev. D71(6), 064015 (3/2005) (6 pages).
104. Umpei Miyamoto, Hideki Maeda and Tomohiro Harada, “Quantum Effect and Strength of Naked Singuarities”, Prog. Theor. Phys. 113(3), 513-533 (3/2005).
105. Hideo Iguchi, Tomohiro Harada and Filipe C. Mena, “Spherically symmetric perfect fluid in area-radial coordinates”, Class. Quantum Grav. 22(5), 841-853 (3/2005).
106. Hideki Maeda and Tomohiro Harada, “Kink instability and stabilization of the Friedmann universe with scalar fields”, Phys. Lett. B607(1-2), 8-16 (2/2005).
107. Tomohiro Harada and Ken-ichi Nakao, “Border of spacetime”, Phys. Rev. D70(4), 041501(R) (8/2004) (3 pages).
108. Umpei Miyamoto and Tomohiro Harada, “Semiclassical instability of the Cauchy horizon in self-similar collapse”, Phys. Rev. D69(10), 104005 (5/2004) (10 pages).
109. Hajime Sotani, Kazunori Kohri and Tomohiro Harada, “Restricting quark matter models by gravitational wave observation”, Phys. Rev. D69(8), 084008 (4/2004) (10 pages).
110. Tomohiro Harada and Hideki Maeda, “Stability criterion for self-similar solutions with a scalar field and those with a stiff fluid in general relativity”, Class. Quantum Grav. 21(2), 371-390 (12/2003).
111. Hideki Maeda, Tomohiro Harada, Hideo Iguchi and Naoya Okuyama, “A Classification of Kinematic Self-Similar Perfect-Fluid Solutions II”, Prog. Theor. Phys. 110(1), 25-63 (7/2003).
112. Hajime Sotani and Tomohiro Harada, “Nonradial oscillations of quark stars”, Phys. Rev. D68(2), 024019 (7/2003) (10 pages).
113. Tomohiro Harada, Hideo Iguchi and Masaru Shibata, “Computing gravitational waves from slightly nonspherical stellar collapse to black hole: Odd-parity perturbation”, Phys. Rev. D68(2), 024002 (7/2003) (21 pages).
114. Tomohiro Harada, Hideki Maeda and Benoit Semelin, “Criticality and convergence in Newtonian collapse”, Phys. Rev. D67(4), 084003 (4/2003) (10 pages).
115. Tomohiro Harada, C. Goymer and B.J. Carr, “Tolman-Bondi collapse in scalar-tensor theories as a probe of gravitational memory”, Phys. Rev. D66(10), 104023 (11/2002) (9 pages).
116. Hideki Maeda, Tomohiro Harada, Hideo Iguchi and Naoya Okuyama, “A Classification of Spherically Symmetric Kinematic Self-Similar Perfect-Fluid Solutions”, Prog. Theor. Phys. 108(5), 819-851 (11/2002).
117. Takashi Tamaki, Tomohiro Harada, Umpei Miyamoto and Takashi Torii, “Particle velocity in noncommutative spacetime”, Phys. Rev. D66(10), 105003 (11/2002) (6 pages).
118. Hideki Maeda, Tomohiro Harada, Hideo Iguchi and Naoya Okuyama, “No go theorem for kinematic self-similarity with polytropic equation of state”, Phys. Rev. D66(2), 027501 (7/2002) (4 pages).

119. Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao, “Physical Processes in Naked Singularity Formation”, Prog. Theor. Phys. 107(3), 449-524 (3/2002) (invited).
120. Takashi Tamaki, Tomohiro Harada, Umpei Miyamoto and Takashi Torii, “Have we already detected astrophysical symptoms of space-time noncommutativity?”, Phys. Rev. D65(8), 083003 (3/2002) (7 pages).
121. Hideki Maeda and Tomohiro Harada, “Critical phenomena in Newtonian gravity”, Phys. Rev. D64(12), 124024 (11/2001) (7 pages).
122. Tomohiro Harada, “Stability criterion for self-similar solutions with perfect fluids in general relativity”, Class. Quantum Grav. 18(21), 4549-4568 (11/2001).
123. Tomohiro Harada, “Reconstructing the equation of state for cold nuclear matter from the relationship of any two properties of neutron stars”, Phys. Rev. C64(4), 048801 (9/2001) (3 pages).
124. Hideo Iguchi and Tomohiro Harada, “Physical aspects of naked singularity explosion – How does a naked singularity explode? –”, Class. Quantum Grav. 18(17), 3681-3699 (9/2001).
125. Tomohiro Harada, Hideo Iguchi, Ken-ichi Nakao, T.P. Singh, Takahiro Tanaka and Cenalo Vaz, “Naked singularities and quantum gravity”, Phys. Rev. D64(4), 041501 (7/2001) (5 pages).
126. Tomohiro Harada and Hideki Maeda, “Convergence to a self-similar solution in general relativistic gravitational collapse”, Phys. Rev. D63(8), 084022 (3/2001) (14 pages).
127. Ken-ichi Nakao, Hideo Iguchi and Tomohiro Harada, “Newtonian analysis of gravitational waves from naked singularity”, Phys. Rev. D63(8), 084003 (3/2001) (15 pages).
128. Ken-ichi Nakao, Tomohiro Harada, Masaru Shibata, Seiji Kawamura and Takashi Nakamura, “Response of interferometric detectors to scalar gravitational waves”, Phys. Rev. D63(8), 082001 (3/2001) (14 pages).
129. Hideaki Kudoh, Tomohiro Harada and Hideo Iguchi, “Birth of timelike naked singularity”, Phys. Rev. D62(10), 104016 (10/2000) (10 pages).
130. Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao, “Power, energy, and spectrum of a naked singularity explosion”, Phys. Rev. D62(8), 084037 (9/2000) (17 pages).
131. Nobuyuki Sakai, Ken-ichi Nakao and Tomohiro Harada, “Causal structure of an inflating magnetic monopole”, Phys. Rev. D61(12), 127302, (5/2000) (4 pages).
132. Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao, “Naked singularity explosion”, Phys. Rev. D61(10), 101502(R), (4/2000) (4 pages).
133. Hideo Iguchi, Tomohiro Harada and Ken-ichi Nakao, “Gravitational Radiation from a Naked Singularity II – Even-Parity Perturbation –”, Prog. Theor. Phys. 103(1), 53-72 (1/2000).
134. Norimasa Sugiura, Ken-ichi Nakao and Tomohiro Harada, “Distance-redshift relation in an isotropic inhomogeneous universe II: Spherically symmetric dust-shell universe”, Phys. Rev. D60(10), 103508 (10/1999) (14 pages).
135. Tomohiro Harada, Ken-ichi Nakao and Hideo Iguchi, “Nakedness and curvature strength of shell-focusing singularity in the spherically symmetric space-time with vanishing radial pressure”, Class. Quantum Grav. 16(8), 2785-2796 (8/1999).
136. Hideo Iguchi, Tomohiro Harada and Ken-ichi Nakao, “Gravitational Radiation from a Naked Singularity – Odd-Parity Perturbation –”, Prog. Theor. Phys. 101(6), 1235-1252 (6/1999).
137. Tomohiro Harada, “Final fate of the spherically symmetric collapse of a perfect fluid”, Phys. Rev. D58(10), 104015 (10/1998) (12 pages).
138. Norimasa Sugiura, Ken-ichi Nakao and Tomohiro Harada, “Distance-redshift relation in an isotropic inhomogeneous universe: Spherically symmetric dust-shell universe”, Phys. Rev. D58(10), 103504 (10/1998) (5 pages).
139. Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao, “Naked singularity formation in the collapse of a spherical cloud of counterrotating particles”, Phys. Rev. D58(4), 041502(R) (7/1998) (4 pages).
140. Hideo Iguchi, Ken-ichi Nakao and Tomohiro Harada, “Gravitational waves around a naked singularity: Odd-parity perturbation of Lemaıtre-Tolman-Bondi space-time”, Phys. Rev. D57(8), 7262-7273 (5/1998).
141. Tomohiro Harada, “Neutron stars in scalar-tensor theories of gravity and catastrophe theories”, Phys. Rev. D57(8), 4802-4811 (3/1998).
142. Takeshi Chiba, Tomohiro Harada and Ken-ichi Nakao, “Gravitational Physics in Scalar-Tensor Theories – Tests of Strong Field Gravity –”, Prog. Theor. Phys. Suppl. 128, 335-372 (12/1997).
143. Tomohiro Harada, “Stability Analysis of Spherically Symmetric Star in Scalar-Tensor Theories of Gravity”, Prog. Theor. Phys. 98(2), 359-379 (8/1997).
144. Tomohiro Harada, Takeshi Chiba, Ken-ichi Nakao and Takashi Nakamura, “Scalar gravitational wave from Oppenheimer-Snyder collapse in scalar-tensor theories of gravity”, Phys. Rev. D55(4), 2024-2037 (2/1997).