- Tomohiro Harada, “Geometrical interpretation for the compaction function for PBH formation”, International Workshop
“Dynamics of primordial black hole formation II”, 7-10 Oct 2024, Nagoya University, Japan
- Tomohiro Harada, Chul-Moon-Yoo and Yasutaka Koga,
“Revisiting compaction functions for primordial black hole formation”,
the 17th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 7-12 Jul 2024, Aurum, the ‘Gabriele d’Annunzio’ University and ICRANet, Pescara, Italy
- 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”,
the 17th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 7-12 Jul 2024, Aurum, the ‘Gabriele d’Annunzio’ University and ICRANet, Pescara, Italy
- Tomohiro Harada, “Particle emission from horizonless compact objects”,
The third edition of the Quantum Field Theory in Curved Spacetimes Workshop,
18-21 June 2024, Instituto Superior Técnico, Lisbon
- Tomohiro Harada, “Primordial black hole formation: Type II B”,
International Conference on
“New Horizons in Primordial Black Hole Physics (NEHOP) – '24”,
17 - 20 June 2024, National Galleries of Scotland, Edinburgh, Scotland
- Tomohiro Harada, “Formation of PBHs: introduction, spins and type II”, International Conference “Barcelona Black Holes (BBH) I: Primordial Black Holes”,
27-31 May 2024, Faculty of Physics, University of Barcelona, Barcelona, Spain (invited)
- Tomohiro Harada, “Revisiting compaction functions for primordial black hole formation”, Gravity and Cosmology 2024, 29 Jan - 1 Mar 2024, Yukawa Institute for Theoretical Physics, Kyoto, Japan
- Tomohiro Harada, “Primordial black hole formation from cosmological perturbations: recent developments”, Future Perspectives on
Primordial Black Holes, 11-13 Dec 2023,
Botanical Garden of Sapienza University, Rome, Italy (invited)
- Tomohiro Harada, “Revisiting compaction functions for primordial black hole formation”, The 32nd Workshop on General Relativity and Gravitation in Japan,
27 Nov - 1 Dec 2023, Nagoya University, Japan
- Tomohiro Harada, “Revisiting compaction functions for primordial black hole formation”, Focus Week on Primordial Black Holes, 13-17 Nov 2023,
Kavli IPMU, Kashiwa, Japan (invited)
- Tomohiro Harada, “Primordial black hole formation from cosmological perturbations”, Gravitational Wave Probes of Physics Beyond Standard Model, 6-9 Nov 2023,
NITEP, Osaka Metropolitan University, Osaka, Japan (invited)
- Tomohiro Harada, “Periapsis shift of a quasi-circular orbit in a static spherically symmetric spacetime and the active gravitational mass density”,
Black Hole and Gravitational Waves
–from modified theories of gravity to data analysis–,
4-8 Sep 2023, APCTP Headquater, Pohang, Korea (invited)
- Tomohiro Harada, “The periapsis shift of a quasi-circular orbit in a static spherically symmetric spacetime and the active
gravitational mass density”,
XV International Conference on Gravitation,
Astrophysics and Cosmology (ICGAC15),
3-7 Jul 2023, Kolon Hotel, Gyeongju, Korea
- Tomohiro Harada, “Compaction function revisited”,
International Workshop: “Dynamics of Primordial Black Hole Formation”,
10-11 Mar 2023, Rikkyo University, Tokyo, Japan (invited)
- Tomohiro Harada, “Periapsis shift in a general static spherically symmetric spacetime”, The 31st Workshop on General
Relativity and Gravitation in Japan (The 13th RESCEU International Symposium),
24-28 Oct 2022,
The University of Tokyo, Tokyo, Japan
- Tomohiro Harada, “Complete classification of the FLRW solutions with linear equation of state: p.p. curvature singularities for general geodesics”,
The Workshop “Gravity: Current challenges in black hole physics and
cosmology”, 20 Jun-1 Jul, 2022, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan
- Tomohiro Harada, “Spins of primordial black holes formed in the
radiation-dominated phase of the universe:
first-order effect”, The 30th Workshop on General
Relativity and Gravitation in Japan, 6-9 Dec 2021,
Waseda University, Tokyo, Japan (online)
- Tomohiro Harada, “Spins of primordial black holes formed in the radiation-dominated phase of the universe: first-order effect”,
“The KEK-PH + KEK-Cosmo joint workshop on “Primordial Black Holes””,
19-20 Oct 2021, KEK, Tsukuba, Japan (online)
- Tomohiro Harada, “Primordial Black Holes: Mass and Spin”,
the 7th Korea-Japan Workshop on Dark Energy: Maeda's Universe,
7-10 Dec 2020
orginized by Korea Astronomy and Space Science Institution (invited, online)
- Tomohiro Harada, “Stability of charged AdS black holes in the Robin boundary”,
Online JGRG workshop 2020, 23-27 Nov 2020 (online)
- Tomohiro Harada, “Particle Creation by Horizonless Compact Objects”,
International Workshop on Astrophysics and Cosmology, 20-24 Dec
2019, International Centre for Cosmology, Charotar University of
Science and Technology, Changa, Gujarat, India (invited)
- Tomohiro Harada, “Formation of Primordial Black Holes”,
International Workshop on Astrophysics and Cosmology, 20-24 Dec
2019, International Centre for Cosmology, Charotar University of
Science and Technology, Changa, Gujarat, India (invited plenary talk)
- Tomohiro Harada, “Effect of Inhomogeneity on Primordial Black
Hole Formation in the Matter Dominated Era”, Focus Week on Primordial Black Holes, 2-6 Dec 2019, Kavli IPMU, Kashiwa, Japan
- Tomohiro Harada, “Particle creation in gravitational collapse to
a horizonless compact object”, the 19th Lomonosov Conference on
Elementary Particle Physics, 22-28 August 2019, Moscow State
University, Moscow, Russia (invited)
- Tomohiro Harada, “Particle Creation In Gravitational Collapse To A Horizonless Compact Object”, the 22nd International Conference on General Relativity and Gravitation, 7 - 12 July 2019, Valencia Conference Centre, Valencia, Spain.
- Tomohiro Harada, “Primordial black hole formation”,
as a seminar for International KEK-Cosmo and APCosPA Winter School 2019
“Primordial Black Hole”, 22 - 24 January 2019, KEK,
Tsukuba, Japan (invited)
- Tomohiro harada, “Complete conformal classification of the FLRW
solutions with a linear equation of state”, YITP International
Molecule-type Workshop “Dynamics in Strong Gravity Universe”,
1-14 Sep 2018, Yukawa Institute for Theoretical Physics, Kyoto
University, Kyoto, Japan
- Tomohiro harada, “Complete conformal classification of the FLRW
solutions with a linear equation of state”, Spanish-Portuguese
Relativity Meeting 2018, 1-7 Sep 2018,
Biblioteca Publica de Palencia, Palencia, Spain
- Tomohiro Harada, “Primordial black holes formed in the
matter-dominated era”, International Workshop
“Gravity and Cosmology 2018”, 29 Jan 2018 - 9 Mar 2018,
Yukawa Institute for Theoretical Physics, Kyoto University, Japan
- Tomohiro Harada, “Spins of primordial black holes formed in the
matter-dominated era”, International Symposium on
Cosmology and Particle Astrophysics “CosPA 2017”, 11-15 Dec 2017,
Yukawa Institute for Theoretical Physics, Kyoto University, Japan
- Tomohiro Harada, “Spins of primordial black holes formed in the
matter-dominated era”, The 27th Workshop on General
Relativity and Gravitation in Japan, 27 Nov-1 Dec 2017,
Higashi Hiroshima Arts and Culture Hall Kurara,
Higashihiroshima, Japan
- Tomohiro Harada, “Formation of primordial black holes from
primordial fluctuations”, Focus Week on Primordial Black Holes,
13-17 Nov 2017, Kavli IPMU, Kashiwa, Japan (invited)
- Tomohiro Harada, “Spins of primordial black holes formed in the
matter-dominated phase of the Universe”, Workshop on
“Gravitational Dynamics and Black Holes”, 26-27 Sep 2017,
Nagoya University, Japan (invited)
- Tomohiro Harada, “Primordial black hole formation in a matter-dominated universe”, The 26th Workshop on General
Relativity and Gravitation in Japan, 24-28 Oct 2016,
Osaka City University, Japan
- Tomohiro Harada, “Primordial black hole formation from
cosmological fluctuations”, the international conference “Hot
Topics in General Relativity and Gravitation 2”, 9-15 Aug 2015, Quy
Nhon, Vietnam. (invited)
- Tomohiro Harada, “High energy particle collision and collisional
Penrose process near a Kerr black hole”, the workshop
“One Hundred Years of Strong Gravity”, 10-12 Jun 2015, Instituto
Superior Técnico in Lisbon, Lisbon, Portugal. (invited)
- Tomohiro Harada, “Black holes as particle accelerators: a
brief review”, The 24th Workshop on General
Relativity and Gravitation in Japan, 10-14 Nov 2014,
Kavli IPMU, University of Tokyo, Kashiwa, Japan.
- Tomohiro Harada, “Threshold of primordial black hole formation”,
The 15th Canadian Conference on General Relativity and Relativistic
Astrophysics, 21-23 May 2014, University of
Winnipeg, Winnipeg, Canada
- Tomohiro Harada, “Analytic formula for the threshold of
primordial black hole formation”,
The 23rd Workshop on General
Relativity and Gravitation in Japan, 5-8 Nov 2013,
Hirosaki University, Hirosaki, Japan.
- Tomohiro Harada, “UPPER LIMITS OF PARTICLE EMISSION FROM
HIGH-ENERGY COLLISION AND REACTION NEAR A MAXIMALLY ROTATING KERR
BLACK HOLE”, the 20th GR and 10th Amalidi Coference on
Gravitatonal Waves,
7-13 July 2013, University of Warsaw, Warsaw, Poland.
(poster and short talk)
- Tomohiro Harada, “High-velocity collision of particles around a
Kerr black hole and its implication”, Nishinomiya Yukawa
Symposium: New Waves in Gravity and Cosmology,
4-6 Dec 2012, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan. (poster and short talk)
- Tomohiro Harada, “High-velocity collision of particles around a
Kerr black hole and its implication”, Gravity and Cosmology 2012,
18 Nov-21 Dec 2012, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan.
- Tomohiro Harada, “Upper limits of particle emission from
high-energy collisionand reaction near a maximally rotating Kerr
black hole”, the RESCEU SYMPOSIUM ON GENERAL RELATIVITY AND
GRAVITATION “JGRG22”, 12-16 Nov 2012, RESCEU, University of
Tokyo, Tokyo, Japan.
- Tomohiro Harada and Masashi Kimura, “High-velocity collision of two general geodesic particles around a Kerr black hole”,
the 13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 1-7 Jul 2012, Stockholm University, Stockholm, Sweden.
- Tomohiro Harada and Masashi Kimura, “High-velocity collision of an ISCO particle around a Kerr black hole”,
the 13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 1-7 Jul 2012, Stockholm University, Stockholm, Sweden.
- Tomohiro Harada, “High-velocity collision of particles around a rapidly rotating black hole”, The 7th International Conference on Gravitation and Cosmology, 14-19 Dec 2011, Holiday Inn Goa,
Goa, India.
- Tomohiro Harada, “High-velocity collision of
particles around a rapidly rotating black hole”,
The 21st Workshop on General
Relativity and Gravitation in Japan, 26-29 Sep 2011,
Tohoku University, Sendai, Japan.
- Tomohiro Harada, “Collision of geodesic particles
around a Kerr black hole”,
IPMU Workshop on Black Holes,
21-25 Feb 2011, IPMU, University of Tokyo, Kashiwa, Japan. (invited)
- Tomohiro Harada, “Black hole candidates and the Kerr bound”, The 20th Workshop on General
Relativity and Gravitation in Japan, 21-25 Sep 2010,
Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan. (poster and short talk)
- Tomohiro Harada, “Black hole candidates and the Kerr bound”,
Spanish Relativity Meeting 2010, 6-10 Sep 2010, Palacio de Exposiciones y Congresos de Granada, Granada, Spain.
- Tomohiro Harada, “Einstein-Rosen waves and the self-similarity
hypothesis in cylindrical symmetry”, The 19th Workshop on General
Relativity and Gravitation in Japan, 30 Nov - 4 Dec 2009,
Rikkyo University, Tokyo, Japan
- Tomohiro Harada, Ken-ichi Nakao and Brien C. Nolan, “Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry“, The 12th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 12-18 Jul 2009, Unesco Headquarters, Paris, France.
- Tomohiro Harada, “Gravitational collapse of a dust ball from a perspective of loop quantum gravity: an application”, The 18th Workshop on General Relativity and Gravitation in Japan, 17-21 Nov 2008, Hiroshima University, Hiroshima, Japan
- Tomohiro Harada, “Self-similar black holes in an accelerated universe”,
Spanish Relativity Meeting 2008, 15-19 Sep 2008, Hospederia Fonseca
Conference Centre, Salamanca, Spain.
- Tomohiro Harada, “Self-similar cosmological solutions with dark energy”, The 17th Workshop on General Relativity and Gravity, 3 - 7 Dec 2007, Nagoya University, Japan. (poster and short talk)
- Tomohiro Harada, Hideki Maeda and B.J. Carr, “Self-similar cosmological solutions with dark energy I: formulation and asymptotic analysis”, The 8th International Conference on Gravitation and Astrophysics, 29 Aug -1 Sep 2007, Nara Women's University, Nara, Japan. (poster and short talk, refereed)
- Hiromi Saida, Tomohiro Harada and Hideki Maeda, “Black Hole Evaporation
in a Friedmann Universe”, The 8th International Conference on
Gravitation and Astrophysics, 29 Aug -1 Sep 2007, Nara Women's
University, Nara, Japan. (poster and short talk, refereed)
- Tomohiro Harada, Hideki Maeda and B. J. Carr , “Asymptotically Friedmann Self-Similar Solutions with Dark Energy”, The 18th International Conference on General Relativity and Gravitation in Japan, 8-14 July 2007, Sydney Conference Centre, Sydney, Australia.
- Tomohiro Harada, “Non-existence of self-similar black hole in a universe with a scalar field or quintessence”, The 16th Workshop on General Relativity and Gravity, 27 Nov - 1 Dec 2006, Niigata Prefectural Civic Center, Niigata, Japan
- Tomohiro Harada, “Naked singularities and self-similarity in
gravitational collapse”, Workshop “From Geometry To Numerics”,
20-24 November 2006, Institut Henri Poincare, Paris,
France. (invited)
- Tomohiro Harada, “Singularities and Self-Similarity in
Gravitational Collapse”, Hayashibara Forum on Singularities,
20-23 November 2006, Insitut des Hautes Etudes Scientifiques,
Bur-sur-Yvette, France. (invited)
- Tomohiro Harada, “Black Holes in Scalar Field/Quintessence Cosmology”, The 11th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories, 23-29 July 2006, Berlin Freie Universitaet, Berlin, Germany.
- Tomohiro Harada, “Primordial black holes in scalar field/quintessence cosmology”, Workshop and Discussion Meeting on Black Holes, Spacetime Singularities and Cosmic Censorship, 3-8 March 2006, Tata Institute of Fundamental Research, Mumbai, India.
- Tomohiro Harada, “Growth of primordial black holes”, The 7th Asia-Pacific International Conference on Gravitation and Astrophysics, 23 - 26 November 2005, National Central University, Chungli, Taiwan.
- Tomohiro Harada,
“Super-horizon primordial black holes”,
The 3rd 21st Century COE Symposium on Physics of Self-organization
System: Astrophysics as Interdisciplinary Science, 1-3 Sep 2005,
Waseda University, Tokyo, Japan
- Tomohiro Harada,
“Growth of primordial black holes in a universe containing
a massless scalar field”,
Post-YKIS 2005 Workshop: Frontiers of Gravitational Wave Physics,
27-28 July 2005, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan
- Tomohiro Harada,
“Primordial Black Holes with a Massless Scalar Field”,
the Workshop on Numerical Relativity, 22-23 Feb 2005, Tainan University,
Tainan, Taiwan
- Tomohiro Harada,
“Primordial Black Holes with a massless scalar field”,
the 17th International Conference on General Relativity and
Gravitation, 18-23 July 2004, Trinity College Dublin, Dublin, Ireland.
- Tomohiro Harada,
“Spherically symmetric perfect fluid collapse in the
area-radial coordinates”,
International Workshop on Dynamics and Thermodynamics of
Blackholes and Naked Singularities,
13-15 May 2004, Politecnico di Milano, Milan, Italy.
- Tomohiro Harada,
“Gravitational Collapse and Naked Singularities”,
in the 5th International Conference
on Gravitation and Cosmology, 5-10 Jan 2004, Cochin,
India. (invited)
- Tomohiro Harada,
“Computing gravitational waves from slightly nonsoherical
stellar collapse to a black hole”,
Conference on Sources of Gravitational Waves, 22-26 Sep
2003, SISSA, Trieste, Italy.
- Tomohiro Harada,
“Criticality and convergence in Newtonian gas collapse”,
the 3rd British Gravity Meeting, 12-14 Sep 2003, Ambleside, UK
- Tomohiro Harada,
“Self-Similar Solutions, Critical Behavior and Convergence to
Attractor in Gravitational Collapse”,
in the 12th Workshop on
General Relativity and Gravitation in Japan, 25-28 Nov 2002,
University of Tokyo,
Tokyo, Japan. (invited)
- Tomohiro Harada,
“Stability of Self-Similar Solutions with Perfect Fluids”,
the 11th Workshop on General Relativity
and Gravitation in Japan, Jan 9-12 2002, Waseda University,
Tokyo, Japan.
- Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao,
“Naked Singularity Explosion”,
the 9th Marcel Grosmann Meeting on recent developments
in theoretical and experimental general relativity,
gravitation and relativistic field theories, University of
Rome, Rome, Italy, 2-8 July
2000.
- Tomohiro Harada, B.J. Carr and C.A. Goymer,
“Gravitational Memory ? – a Perturbative Analysis –”,
the 10th Workshop on General Relativity and Gravitation in Japan,
11-14 Sep 2000, Osaka University, Osaka, Japan.
