Developing multiwavelength gravitational wave astrophysics

• Project/Area Number: 15H02082
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: Yokoyama Jun'ichi 東京大学, 大学院理学系研究科(理学部), 教授 (50212303)
• Co-Investigator(Kenkyū-buntansha): 伊藤 洋介 大阪市立大学, 大学院理学研究科, 准教授 (60443983) ; カンノン キップ 東京大学, 大学院理学系研究科(理学部), 教授 (50777886) ; 茂山 俊和 東京大学, 大学院理学系研究科(理学部), 教授 (70211951)
• Project Period (FY): 2015-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥42,120,000 (Direct Cost: ¥32,400,000、Indirect Cost: ¥9,720,000); Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2018: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000); Fiscal Year 2017: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000); Fiscal Year 2016: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000); Fiscal Year 2015: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
• Keywords: 重力波 / 独立成分解析 / ブラックホール / 連星中性子星合体 / 重力理論 / 宇宙論的相転移 / インフレーション宇宙論 / 非ガウスノイズ / データ解析 / 連星ブラックホール合体 / 初期宇宙 / KAGRA / 連星中性子星 / 中性子星 / 元素合成 / インフレーション宇宙 / GW170817 / Bモード偏光 / LIGO / 宇宙科学 / コンパクト天体 / 宇宙論 / 宇宙マイクロ波背景放射 / 宇宙物理 / 高密度天体 / 独立成分分析 / インフレーション / 中性子星合体

Outline of Final Research Achievements

This project aimed at probing the very early universe or deep inside a stellar body in terms of multi-frequency gravitational waves, ranging ultra-low frequency cosmological gravitational waves to those at 100Hz range that can be observed by ground-based detectors. During the research period, a number of events took place, namely, BICEP2 data being falsified and success in direct detection by aLIGO. In this situation, we have flexibly worked out a number of important issues such as formulating an independent component analysis to apply for the forthcoming KAGRA data analysis as well as studies on cosmological gravitational waves in modified gravity theories to show that the three point function of B-mode polarization of cosmic microwave background is a useful quantity to probe these theories. We have also been joined by the top data analyst of aLIGO as a co-I, who discovered the first binary neutron star coalescence.

Academic Significance and Societal Importance of the Research Achievements

重力波は極めて透過性がよいため、光では観測できない初期宇宙や天体の深奥をこれによってみることが可能です。本研究は、さまざまな波長の重力波を用いることによって、宇宙史の異なる時代や異なる天体について有用な情報が得られることを示すための基礎研究と位置づけられるものであり、わが国のKAGRAの本格観測を控えて、重要な意義を持つものです。とくに、本研究計画によって行ったノイズ除去の基礎研究はKAGRAによる初検出を実現するのに、役立つものと期待され、KAGRAが初期の感度を達成し国際観測ネットワークに参画する上で、本研究は大きな社会的意義を果たすものといえます。

Research Products

• [Int'l Joint Research] ペンシルベニア州立大学/カリフォルニア工科大学/マサチューセッツ工科大学(米国)
• [Int'l Joint Research] ランダウ理論物理学研究所(ロシア連邦)
• [Int'l Joint Research] 延世大学(韓国)
• [Int'l Joint Research] 香港科学技術大学(その他の国・地域)
• [Int'l Joint Research] California Institute of Technology/MIT/Pennsylvania state university(米国)
• [Int'l Joint Research] University of Toronto(Canada)
• [Int'l Joint Research] ルーバンカトリック大学(ベルギー)
• [Int'l Joint Research] カリフォルニア工科大学/マサチューセッツ工科大学/ペンシルバニア州立大学(米国)
• [Int'l Joint Research] トロント大学(カナダ)
• [Int'l Joint Research] 中山大学(中国)
• [Int'l Joint Research] ランカスター大学(英国)
• [Int'l Joint Research] パリ天体物理学研究所(フランス)
• [Int'l Joint Research] ルーバンカトリック大学(ベルギー)
• [Int'l Joint Research] ランカスター大学(英国)
• [Journal Article] Gravitational leptogenesis with kination and gravitational reheating (2020)
  • Author(s): Kohei Kamada, Jun'ya Kume, Yusuke Yamada, Jun'ichi Yokoyama
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 01 Issue: 01 Pages: 0161-15
  • DOI: 10.1088/1475-7516/2020/01/016
  • NAID: 130008157359
  • Peer Reviewed
• [Journal Article] Application of the independent component analysis to the iKAGRA data (2020)
  • Author(s): T. Akutsu, et al. (KAGRA Collaboration)
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2020 Issue: 5 Pages: 27-27
  • DOI: 10.1093/ptep/ptaa056
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] On catalyzed vacuum decay around a radiating black hole and the crisis of the electroweak vacuum (2020)
  • Author(s): Hayashi Takumi、Kamada Kohei、Oshita Naritaka、Yokoyama Jun’ichi
  • Journal Title: Journal of High Energy Physics Volume: 2020 Issue: 8 Pages: 0881-26
  • DOI: 10.1007/jhep08(2020)088
  • Peer Reviewed / Open Access
• [Journal Article] A numerical light curve model for interaction-powered supernovae (2020)
  • Author(s): Takei Yuki、Shigeyama Toshikazu
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 72 Issue: 4 Pages: 4-4
  • DOI: 10.1093/pasj/psaa050
  • Peer Reviewed
• [Journal Article] An arm length stabilization system for KAGRA and future gravitational-wave detectors (2020)
  • Author(s): Akutsu T, et al. (KAGRA Collaboration)
  • Journal Title: Classical and Quantum Gravity Volume: 37 Issue: 3 Pages: 035004-035004
  • DOI: 10.1088/1361-6382/ab5c95
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fast Luminous Blue Transients in the Reionization Era and Beyond (2020)
  • Author(s): Terasaki Tomoki、Tsuna Daichi、Shigeyama Toshikazu
  • Journal Title: The Astrophysical Journal Volume: 890 Issue: 2 Pages: L17-L17
  • DOI: 10.3847/2041-8213/ab7240
  • Peer Reviewed
• [Journal Article] Model comparison from LIGO-Virgo data on GW170817’s binary components and consequences for the merger remnant (2020)
  • Author(s): B.P. Abbott et al including K. Cannon
  • Journal Title: Classical and Quantum Gravity Volume: 37 Issue: 4 Pages: 045006-045006
  • DOI: 10.1088/1361-6382/ab5f7c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A guide to LIGO-Virgo detector noise and extraction of transient gravitational-wave signals (2020)
  • Author(s): B.P. Abbott et al including K. Cannon
  • Journal Title: Classical and Quantum Gravity Volume: 37 Issue: 5 Pages: 055002-055002
  • DOI: 10.1088/1361-6382/ab685e
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Horndeski model in nonlinearly realized supergravity (2019)
  • Author(s): Y. Yamada and J. Yokoyama
  • Journal Title: JHEP Volume: 12 Issue: 12 Pages: 41-41
  • DOI: 10.1007/jhep12(2019)041
  • Peer Reviewed / Open Access
• [Journal Article] Dark matter and baryon-number generation in quintessential inflation via hierarchical right-handed neutrinos (2019)
  • Author(s): S. Hashiba and J. Yokoyama
  • Journal Title: Physics Letters B Volume: 798 Pages: 135024-135024
  • DOI: 10.1016/j.physletb.2019.135024
  • Peer Reviewed
• [Journal Article] On the violent preheating in the mixed Higgs-R2 inflationary model (2019)
  • Author(s): He Minxi、Jinno Ryusuke、Kamada Kohei、Park Seong Chan、Starobinsky Alexei A.、Yokoyama Jun'ichi
  • Journal Title: Physics Letters B Volume: 791 Pages: 36-42
  • DOI: 10.1016/j.physletb.2019.02.008
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Gravitational particle creation for dark matter and reheating (2019)
  • Author(s): Hashiba Soichiro、Yokoyama Jun’ichi
  • Journal Title: Physical Review D Volume: 99 Issue: 4 Pages: 043008-043008
  • DOI: 10.1103/physrevd.99.043008
  • Peer Reviewed
• [Journal Article] Gravitational reheating through conformally coupled superheavy scalar particles (2019)
  • Author(s): Hashiba Soichiro、Yokoyama Jun'ichi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2019 Issue: 01 Pages: 028-028
  • DOI: 10.1088/1475-7516/2019/01/028
  • Peer Reviewed
• [Journal Article] Reheating through the Higgs amplified by spinodal instabilities and gravitational creation of gravitons (2019)
  • Author(s): Nakama Tomohiro、Yokoyama Jun’ichi
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2019 Issue: 3 Pages: 033-033
  • DOI: 10.1093/ptep/ptz014
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Micro black holes formed in the early Universe and their cosmological implications (2019)
  • Author(s): Nakama Tomohiro、Yokoyama Jun’ichi
  • Journal Title: Physical Review D Volume: 99 Issue: 6 Pages: 061303-061303
  • DOI: 10.1103/physrevd.99.061303
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Long-term dynamics of cosmological axion strings (2018)
  • Author(s): Kawasaki Masahiro、Sekiguchi Toyokazu、Yamaguchi Masahide、Yokoyama Jun’ichi
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2018 Issue: 9 Pages: 1-1
  • DOI: 10.1093/ptep/pty098
  • Peer Reviewed / Open Access
• [Journal Article] Hybrid quasi-single field inflation (2018)
  • Author(s): Wang Yi、Wu Yi-Peng、Yokoyama Jun'ichi、Zhou Siyi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2018 Issue: 07 Pages: 068-068
  • DOI: 10.1088/1475-7516/2018/07/068
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Inflation in the mixed Higgs-R2 model (2018)
  • Author(s): He Minxi、Starobinsky Alexei A.、Yokoyama Jun'ichi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2018 Issue: 05 Pages: 064-064
  • DOI: 10.1088/1475-7516/2018/05/064
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Creation of an inflationary universe out of black hole space-time (2018)
  • Author(s): Oshita Naritaka、Yokoyama Jun’ichi
  • Journal Title: International Journal of Modern Physics A Volume: 33 Issue: 31 Pages: 1844005-1844005
  • DOI: 10.1142/s0217751x18440050
  • Peer Reviewed
• [Journal Article] Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA (2018)
  • Author(s): B. P. Abbott et al.
  • Journal Title: Living Reviews in Relativity Volume: 21 Issue: 1 Pages: 1-57
  • DOI: 10.1007/s41114-018-0012-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for GeV cosmic rays from white dwarfs in the local cosmic ray spectra (2018)
  • Author(s): Kamae, T., Lee, S.-H., Makishima, K., Shibata, S., Shigeyama, T.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70（2） Issue: 2 Pages: 29-29
  • DOI: 10.1093/pasj/psy010
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] CMB B-mode auto-bispectrum produced by primordial gravitational waves (2018)
  • Author(s): Tahara Hiroaki W H、Yokoyama Jun’ichi
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2018 Issue: 1
  • DOI: 10.1093/ptep/ptx185
  • Peer Reviewed / Open Access
• [Journal Article] GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral (2017)
  • Author(s): Abbott B. P.、et al.
  • Journal Title: Physical Review Letters Volume: 119 Issue: 16 Pages: 161101-16
  • DOI: 10.1103/physrevlett.119.161101
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Revisiting the oscillations in the cosmic microwave background angular power spectra at ? ? 120 in the Planck 2015 data (2017)
  • Author(s): Horiguchi Koichiro、Ichiki Kiyotomo、Yokoyama Jun’ichi
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2017 Issue: 9 Pages: 1-9
  • DOI: 10.1093/ptep/ptx121
  • Peer Reviewed / Open Access
• [Journal Article] Construction of KAGRA: an underground gravitational-wave observatory (2017)
  • Author(s): KAGRA Collaboration、ほか
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2018 Issue: 1 Pages: 1-23
  • DOI: 10.1093/ptep/ptx180
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi-messenger Observations of a Binary Neutron Star Merger (2017)
  • Author(s): Abbott B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P. 他 Negoro, H. 含む 3656 名
  • Journal Title: The Astrophysical Journal Letters Volume: 848 Issue: 2 Pages: 1-59
  • DOI: 10.3847/2041-8213/aa91c9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A gravitational-wave standard siren measurement of the Hubble constant (2017)
  • Author(s): Abott B.P. et al including Kipp Cannon
  • Journal Title: Nature Volume: 551 Issue: 7678 Pages: 85-88
  • DOI: 10.1038/nature24471
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of KAGRA Algorithmic Library (KAGALI) (2017)
  • Author(s): K. Ohara et al including Y. Itoh and J. Yokoyama
  • Journal Title: Proceedings of 14th Marcel Grossman Meeting Volume: 14 Pages: 3170-3174
  • DOI: 10.1142/9789813226609_0404
• [Journal Article] Note on reheating inGinflation (2017)
  • Author(s): Moghaddam Hossein Bazrafshan、Brandenberger Robert、Yokoyama Jun’ichi
  • Journal Title: Physical Review D Volume: 95 Issue: 6 Pages: 063529-063529
  • DOI: 10.1103/physrevd.95.063529
  • Peer Reviewed
• [Journal Article] Hydrodynamical interaction of mildly relativistic ejecta with an ambient medium (2017)
  • Author(s): Akihiro Suzuki, Keiichi Maeda, Toshikazu Shigeyama
  • Journal Title: The Astrophysical Journal Volume: 834 Issue: 1 Pages: 32-32
  • DOI: 10.3847/1538-4357/834/1/32
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Constraints on primordial black holes from the Galactic gamma-ray background (2016)
  • Author(s): B.J. Carr, Kazunori Kohri, Yuuiti Sendouda, Jun'ichi Yokoyama
  • Journal Title: Phys.Rev. D Volume: 94 Issue: 4 Pages: 044029-044029
  • DOI: 10.1103/physrevd.94.044029
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Toward the detection of gravitational waves under non-Gaussian noises II. Independent component analysis (2016)
  • Author(s): Soichiro MORISAKI, Jun’ichi YOKOYAMA, Kazunari EDA, Yousuke ITOH
  • Journal Title: Proceedings of the Japan Academy, Series B Volume: 92 Issue: 8 Pages: 336-345
  • DOI: 10.2183/pjab.92.336
  • NAID: 130005420971
  • ISSN: 0386-2208, 1349-2896
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Spatially covariant theories of gravity: disformal transformation, cosmological perturbations and the Einstein frame (2016)
  • Author(s): Fujita Tomohiro、Gao Xian、Yokoyama Jun'ichi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 1602 Issue: 02 Pages: 014-014
  • DOI: 10.1088/1475-7516/2016/02/014
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reheating signature in the gravitational wave spectrum from self-ordering scalar fields (2016)
  • Author(s): Kuroyanagi Sachiko、Hiramatsu Takashi、Yokoyama Jun'ichi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 1602 Issue: 02 Pages: 023-023
  • DOI: 10.1088/1475-7516/2016/02/023
  • Peer Reviewed
• [Journal Article] Large scale CMB anomalies from thawing cosmic strings (2016)
  • Author(s): C. Ringeval, D. Yamauchi, J. Yokoyama, F. R. Bouchet
  • Journal Title: Journal of Cosmology and Astroparticle Phyiscs Volume: 1602 Issue: 02 Pages: 1-23
  • DOI: 10.1088/1475-7516/2016/02/033
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Possible resolution of the domain wall problem in the NMSSM (2016)
  • Author(s): Anupam Mazumdar、齋川賢一、山口昌英、横山順一
  • Journal Title: Physical Review D Volume: 93 Issue: 2 Pages: 0250021-8
  • DOI: 10.1103/physrevd.93.025002
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fermionic Schwinger effect and induced current in de Sitter space (2016)
  • Author(s): Takahiro Hayashinaka, Tomohiro Fujita, Jun'ichi Yokoyama
  • Journal Title: Journal of Cosmology and Astroparticle Physics (JCAP) Volume: 1607 Issue: 07 Pages: 010-010
  • DOI: 10.1088/1475-7516/2016/07/010
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Point splitting renormalization of Schwinger induced current in de Sitter spacetime (2016)
  • Author(s): Takahiro Hayashinaka and Jun'ichi Yokoyama
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 0607 Issue: 07 Pages: 012-012
  • DOI: 10.1088/1475-7516/2016/07/012
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Entropic interpretation of the Hawking-Moss bounce (2016)
  • Author(s): Naritaka Oshita, Jun’ichi Yokoyama
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 051E02 Issue: 5 Pages: 051E02-051E02
  • DOI: 10.1093/ptep/ptw053
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Contribution of Neutron Star Mergers to the r-Process Chemical Evolution in the Hierarchical Galaxy Formation (2016)
  • Author(s): Komiya, Yutaka; Shigeyama, Toshikazu
  • Journal Title: The Astrophysical Journal Volume: 830 Issue: 2 Pages: 76-76
  • DOI: 10.3847/0004-637x/830/2/76
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 2D Radiation-hydrodynamic Simulations of Supernova Shock Breakout in Bipolar Explosions of a Blue Supergiant Progenitor (2016)
  • Author(s): Akihiro Suzuki, Keiichi Maeda, Toshikazu Shigeyama
  • Journal Title: The Astrophysical Journal Volume: 825 Issue: 2 Pages: 92-92
  • DOI: 10.3847/0004-637x/825/2/92
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spherical explosion with a central energy source (2016)
  • Author(s): Masuyama, M., Shigeyama, T., Tsuboki, Y.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 2 Pages: 22-22
  • DOI: 10.1093/pasj/psv140
  • Peer Reviewed
• [Journal Article] Binary Black Hole Mergers in the First Advanced LIGO Observing Run (2016)
  • Author(s): B.P. Abott et al including Kipp Cannon
  • Journal Title: Physical Review X Volume: 6 Issue: 4 Pages: 041015-041015
  • DOI: 10.1103/physrevx.6.041015
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence (2016)
  • Author(s): B.P. Abott et al including Kipp Cannon
  • Journal Title: Physical Review Letters Volume: 116 Issue: 24 Pages: 241103-241103
  • DOI: 10.1103/physrevlett.116.241103
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Localization and Broadband Follow-up of the Gravitational-wave Transient GW150914 (2016)
  • Author(s): B. P. Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. and 1564 coauthors
  • Journal Title: Astrophysical Journal Letters Volume: 826 Issue: 1 Pages: L13-L13
  • DOI: 10.3847/2041-8205/826/1/l13
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tests of General Relativity with GW150914 (2016)
  • Author(s): B.P. ABBOTT et al including Kipp Cannon
  • Journal Title: Physical Review Letters Volume: 116 Issue: 22 Pages: 22101-22101
  • DOI: 10.1103/physrevlett.116.221101
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Characterization of non-Gaussianity in gravitational wave detector noise (2016)
  • Author(s): Takahiro Yamamoto, Kazuhiro Hayama, Shuhei Mano, Yousuke Itoh, Nobuyuki Kanda
  • Journal Title: Physical Review D Volume: 93 Issue: 8 Pages: 082005-082005
  • DOI: 10.1103/physrevd.93.082005
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Contribution of Neutron Star Mergers to the r-Process Chemical Evolution in the Hierarchical Galaxy Formation (2016)
  • Author(s): H. Komiya and T. Shigeyama
  • Journal Title: Astrophysical Journal Volume: 830
  • Peer Reviewed
• [Journal Article] Galilean Creation of the Inflationary Universe (2015)
  • Author(s): T. Kobayashi, M. Yamaguchi, J. Yokoyama
  • Journal Title: JCAP Volume: 1507 Issue: 07 Pages: 1-22
  • DOI: 10.1088/1475-7516/2015/07/017
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Large tensor mode, field range bound and consistency in generalized G-inflation (2015)
  • Author(s): Taro Kunimitsu, Teruaki Suyama, Yuki Watanabe, Jun'ichi Yokoyama
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 1508 Issue: 08 Pages: 1-27
  • DOI: 10.1088/1475-7516/2015/08/044
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Spontaneous scalarization-induced dark matter and variation of the gravitational constant (2015)
  • Author(s): Pisin Chen, Teruaki Suyama, Jun'ichi Yokoyama
  • Journal Title: Physical Reivew D Volume: 92 Issue: 12 Pages: 1-15
  • DOI: 10.1103/physrevd.92.124016
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Gravitational waves as a probe of the history of the universe (2019)
  • Author(s): 横山順一
  • Organizer: NORDITA program ``Gravitational waves from the early universe''
  • Int'l Joint Research / Invited
• [Presentation] Garvitational waves as a probe of the early universe (2019)
  • Author(s): 横山順一
  • Organizer: APCTP School/Workshop on Gravitational-wave cosmology
  • Int'l Joint Research / Invited
• [Presentation] The effectiveness of Independent Component Analysis with iKAGRA data : continuous waves (2019)
  • Author(s): 粂潤哉 関口豊和 森﨑宗一郎 伊藤洋介 横山順一
  • Organizer: KAGRA 22nd f2f meeting
  • Int'l Joint Research
• [Presentation] Application of independent component analysis to KAGRA data (2019)
  • Author(s): J. Kume, T. Sekiguchi, Y. Itoh, S. Morisaki and J. Yokoyama
  • Organizer: GWPAW 2019
  • Int'l Joint Research
• [Presentation] 独立成分解析によるKAGRAデータの雑音除去 (2019)
  • Author(s): 粂潤哉、関口豊和、森崎宗一郎、伊藤洋介、横山順一
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] ホルンデスキー理論における静的球対称時空の角度方向摂動に対する安定性 (2019)
  • Author(s): 田原弘章、小林努、横山順一
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 重力波のサイエンス (2019)
  • Author(s): 横山順一
  • Organizer: CRC将来計画タウンミー ティング
  • Invited
• [Presentation] Gravitational wave data analysis with the independent component analysis (2018)
  • Author(s): Jun'ichi Yokoyama
  • Organizer: KAGRA data analysis workshop
  • Int'l Joint Research
• [Presentation] Reheating and spontaneous cogenesis after G-inflation (2018)
  • Author(s): Jun'ichi Yokoyama
  • Organizer: Joint Canada Asia Pacific Conference on General Relativity and Relativistic Astrophysics
  • Int'l Joint Research / Invited
• [Presentation] Approaches to inflationary cosmology (2018)
  • Author(s): Jun'ichi Yokoyama
  • Organizer: Summer School at Democritos Institute
  • Int'l Joint Research / Invited
• [Presentation] Self-anisotropizing inflationary universe in Horndeski theory and beyond (2018)
  • Author(s): Jun'ichi Yokoyama
  • Organizer: 7th International Conference on New Frontiers in Physics (ICNFP2018)
  • Int'l Joint Research / Invited
• [Presentation] Micro black hole remnant and Planckian interacting dark matter (2018)
  • Author(s): Jun'ichi Yokoyama
  • Organizer: CosPA2018
  • Int'l Joint Research / Invited
• [Presentation] インフレーションからキネーション時の重力的ダークマター生成 (2018)
  • Author(s): 横山順一
  • Organizer: インフレーション小研究会
• [Presentation] 重力崩壊型超新星爆発時に中心天体に戻ってくる物質を押し戻す活動性 (2018)
  • Author(s): 茂山俊和
  • Organizer: 日本天文学会
• [Presentation] Creation of the inflationary universe out of a black (2017)
  • Author(s): J. Yokoyama
  • Organizer: International Conference on Gravitation and Cosmology
  • Int'l Joint Research / Invited
• [Presentation] The Universe after G-inflation (2017)
  • Author(s): J. Yokoyama
  • Organizer: Dark Side of the Universe
  • Int'l Joint Research / Invited
• [Presentation] Inflation (and dark energy): Large or Small? (2017)
  • Author(s): J. Yokoyama
  • Organizer: 4th Korea-Japan joint workshop on Dark Energy at KMI
  • Int'l Joint Research / Invited
• [Presentation] Creation of the inflationary universe out of a black hole (2017)
  • Author(s): J. Yokoyama
  • Organizer: The First Symposium of the BRICS Association on Gravity
  • Int'l Joint Research / Invited
• [Presentation] Approaches to inflationary cosmology (2017)
  • Author(s): J. Yokoyama
  • Organizer: 5th international meeting on frontiers of physics
  • Int'l Joint Research / Invited
• [Presentation] Spontaneous genesis after G inflation' (2017)
  • Author(s): J. Yokoyama
  • Organizer: 3rd LeCosPA symposium ``Cosmic Prospects''
  • Int'l Joint Research / Invited
• [Presentation] Origin of r-process elements in dwarf spheroidal galaxies (2017)
  • Author(s): T. Shigeyama
  • Organizer: Workshop on “Theories of Astrophysical Big Bangs
  • Int'l Joint Research / Invited
• [Presentation] Gインフレーションの再加熱 (2017)
  • Author(s): 横山順一
  • Organizer: 日本物理学会
• [Presentation] Tensor perturbations in spatially covariant gravity (2016)
  • Author(s): J. Yokoyama
  • Organizer: CosPA2016
  • Place of Presentation: Sydney (Australia)
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] Gravitational radiation and CMB anisotropy from cosmic strings created during inflation (2016)
  • Author(s): J. Yokoyama
  • Organizer: Cosmic strings at Brazil
  • Place of Presentation: San Carlos （Brazil)
  • Year and Date: 2016-02-16
  • Int'l Joint Research / Invited
• [Presentation] SUSY inflation? What else? (2016)
  • Author(s): J. Yokoyama
  • Organizer: SUSY2016
  • Int'l Joint Research / Invited
• [Presentation] Tensor perturbations in spatially covariant gravity (2016)
  • Author(s): J. Yokoyama
  • Organizer: CosPA 2016
  • Int'l Joint Research
• [Presentation] 初期宇宙と重力 (2016)
  • Author(s): 横山順一
  • Organizer: 理論天文学宇宙物理学懇談会シンポジウム
  • Invited
• [Presentation] Bright novae - Indications of the spectrum of MAXI J0158-744 (2016)
  • Author(s): T. Shigeyama
  • Organizer: 7 years of MAXI: Monitoring X-ray Transients
  • Int'l Joint Research
• [Presentation] Birth of the inflationary universe and tensor perturbation (2015)
  • Author(s): J. Yokoyama
  • Organizer: 2nd LeCosPA symposium
  • Place of Presentation: 台北(台湾)
  • Year and Date: 2015-12-17
  • Int'l Joint Research / Invited
• [Presentation] Gravitational waves from the early Universe (2015)
  • Author(s): J. Yokoyama
  • Organizer: CosPA2015
  • Place of Presentation: 大田(韓国)
  • Year and Date: 2015-10-05
  • Int'l Joint Research / Invited
• [Presentation] Galilean creation of the inflationary universe (2015)
  • Author(s): J. Yokoyama
  • Organizer: COSMO15
  • Place of Presentation: Warsaw(Poland)
  • Year and Date: 2015-09-11
  • Int'l Joint Research / Invited
• [Presentation] Galilean genesis of the inflationary universe (2015)
  • Author(s): J. Yokoyama
  • Organizer: Gordon conference on string theory and cosmology
  • Place of Presentation: 香港(中国)
  • Year and Date: 2015-06-01
  • Int'l Joint Research / Invited
• [Funded Workshop] Gravitational Wave Physics and Astrophysics Workshop (GWPAW2019) (2019)
• [Funded Workshop] RESCEU workshop on space gravitational wave detection (2019)
• [Funded Workshop] 9th RESCEU International Symposium "Gravitational-Wave Astrophysics in the High Event Rate Regime" (2016)