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THEORETICAL STUDIES ON HIGH ENERGY ASTROPHYSICS

Research Project

Project/Area Number 13440061
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionOsaka University

Principal Investigator

TAKAHARA Fumio  OSAKA UNIVERSITY, GRADUATE SCHOOL OF SCIENCES, PROFESSOR, 大学院・理学研究科, 教授 (20154891)

Co-Investigator(Kenkyū-buntansha) MASAI Kuniaki  TOKYO METROPLOLITAN UNIVERCITY, GRADUATE SCHOOL OF SCIENCE, ASSOCIATE PROFESSOR, 理学研究科, 教授 (80181626)
SHIBATA Shinpei  YAMAGATA UNIVERSITY, FACULTY OF SCIENCE, PROFESSOR, 理学部, 教授 (90187401)
MINESHIGE Shin  KYOTO UNIVERSITY, YUKAWA INSTITUTE, PROFESSOR, 基礎物理学研究所, 教授 (70229780)
KUSUNOSE Masaaki  KWANSEI GAKUIN UNIVERSITY, FACULTY OF SCIENCE.TECH., PROFESSOR, 理工学部, 教授 (40211883)
HOSHINO Masahiro  UNIVERSITY OF TOKYO, GRADUATE SCHOOL OF SCIENCE, PROFESSOR, 理学系研究科, 教授 (90241257)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 2003: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2002: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordsaccretion disks / relativistic jets / gamma ray bursts / active galaxies / particle acceleration / black holes / clusters of galaxies / astrophysical plasmas
Research Abstract

During the three year term of this project, each member has done research on individual subjects and published many papers. For each year a research meeting was held to boost mutual understanding of common concepts and physical processes, and interrelations among various high-energy astrophysical objects. Major achievements are as follows :
1. The role of magnetic fields in. accretion disks has been investigated through large scale numerical simulations. Their behavior in impinging into the black hole and effect on time variations in X-ray emission was clarified. A possibility of making a magnetic tower was also suggested.
2. The Wien fireball model for the formation of relativistic jets was quantitatively investigated through the Monte Carlo simulation of radiation hydrodynamics. Analysis of the physical state of jets was also made based on multi-frequency observational data.
3. The spatial size of the region where particle acceleration is occurring in SNR SN1006 and RXJ1713.7 was found to be extremely small and strong constraints on diffusive acceleration were obtained. Electron acceleration process through surfing mechanism utilizing microscopic electric field structure associated with collisionless shocks was clarified through numerical simulation.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (73 results)

All Other

All Publications (73 results)

  • [Publications] S.Iwamoto: "Wien Fireball Model of Relativistic Outflows in Active Galactic Nuclei"Astrophysical Journal. 601. 78-89 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Ohsuga: "Spectral Energy Distribution in Supercritical Disk Accretion through Photon Trapping Effects"Astrophysical Journal. 596. 429-436 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kato: "Formation of Semi-relativistic Jets from Magnetospheres of Accreting Neutron Stars : Injection of Hot Bubbles into a Magnetic Tower"Astrophysical Journal. 600. 338-342 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Hirotani: "Electrodynamics of Outer-Gap Accelerator : Formation of Soft Power-low Spectrum Between 100 MeV and 3 GeV"Astrophysical Journal. 591. 334-353 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takizawa: "Chandra Observations of the Central Region of Abell 3112"Astrophysical Journal. 595. 142-150 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Kusunose: "The Electron Spectrum in 3C 279 and the Observed Emission Spectrum"Astrophysical Journal. 592. L5-L8 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Iwamoto: "Wien Fireball Model of Relativistic Outflows in Active Galactic Nuclei"Astrophysical Journal. 601. 78-89 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Ohsuga: "Spectral Energy Distribution in Supercritical Disk Accretion through Photon Trapping Effects"Astrophysical Journal. 596. 429-436 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kato: "Formation of Semi-relativistic Jets from Magnetospheres of Accreting Neutron Stars: Injection of Hot Bubbles into a Magnetic Tower"Astrophysical Journal. 338-342 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Hirotani: "Electrodynamics of Outer-Gap Accelerator : Formation of Soft Power-low Spectrum Between 100 MeV and 3 GeV"Astrophysical Journal. 591. 334-353 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Takizawa: "Chandra Observations of the Central Region of Abell 3112"Astrophysical Journal. 595. 142-150 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Kusunose: "The Electron Spectrum in 3C 279 and the Observed Emission Spectrum"Astrophysical journal. 592. L5-L8 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Iwamoto: "Wien Fireball Model of Relativistic Outflows in Active Galactic Nuclei"Astrophysical Journal. 601. 78-89 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Ohsuga: "Spectral Energy Distribution in Supercritical Disk Accretion through Photon Trapping Effects"Astrophysical Journal. 596. 429-436 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Kato: "Formation of Send-relativistic Jets from Magnetospheres of Accreting Neutron Stars : Injection of Hot Bubbles into a Magnetic Tower"Astrophysical Journal. 600. 338-342 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Hirotani: "Electrodynamics of Outer-Gap Accelerator : Formation of Soft Power-low Spectrum Between 100 MeV and 3 GeV"Astrophysical Journal. 591. 334-353 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Takizawa: "Chandra Observations of the Central Region of Abell 3112"Astrophysical Journal. 595. 142-150 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Kusunose: "The Electron Spectrum in 3C 279 and the Observed Emission Spectrum"Astrophysical Journal. 592. L5-L8 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Totani: "A Failed Gamma-Ray Burst with Dirty Energetic Jets Spirited Away? New Implications for the Gamma-Ray Burst-Supernova Connection from SN 2002ap"Astrophysical Journal. 598. 1151-1162 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] R.Yamazaki: "An off-axis jet model for GRB980425 and low-energy Gamma Ray Bursts"Astrophysical Journal. 594. L79-L82 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Murata: "X-ray and Gamma-Ray Emission from the PSR 1259-63 / Be Star System"Publ.Astron.Soc.Japan. 55. 473-481 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] N.Shimada, M.Hoshino: "Electron-Ion Coupling Dynamics in the Shock Transition Region"Physics of Plasmas. 10. 1113-1119 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Terasawa: "Astrophysical Particle Acceleration--Heliosphere as an Astrophysical Laboratory---"Prog.Theo.Phys.Supplement. 151. 95-104 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Nagataki: "Explosive Nucleosynthesis Associated with Formation of Jet-induced Gamma-Ray Bursts in Mass"Astrophysical Journal. 596. 401-413 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kataoka, Jun: "RXTE observations of 3C 273 between 1996 and 2000 : variability time-scale and jet power"Monthly Notice of the Royal Astronomical Society... 336 3. 932-944 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Shibata, S.: "On the electric field screening by electron-positron pairs in the pulsar magnetosphere-II"Monthly Notice of the Royal Astronomical Society. 336 1. 233-240 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ohsuga, Ken: "Does the Slim-Disk Model Correctly Consider Photon-trapping Effects?"The Astrophysical Journal. 574 1. 315-324 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kohri, Kazunori: "Can Neutrino-cooled Accretion Disks Be an Origin of Gamma-Ray Bursts?"The Astrophysical Journal. 577 1. 311-321 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kudoh, Takahiro: "Are Jets Ejected from Locally Magnetized Accretion Disks?"Publications of the Astronomical Society of Japan. 54 1. 267-432 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sakai, Nobuyuki: "General Relativistic Electromagnetism and Particle Acceleration in a Pulsar Polar Cap"The Astrophysical Journal. 584 1. 427-432 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Fujita, Yutaka: "Nonthermal Emissions from Particles Accelerated by Turbulence in Clusters of Galaxies"The Astrophysical Journal. 584 1. 190-202 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Masai, Kuniaki: "The Origin of Diffuse X-Ray Emission from the Galactic Ridge. II. Nonequilibrium Emission Due to In Situ Accelerated Electrons"The Astrophysical Journal. 581 2. 1071-1079 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yamazaki, Ryo: "X-Ray Flashes from Off-Axis Gamma-Ray Bursts"The Astrophysical Journal. 571 1. L31-L35 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Zharikov, S.V.: "Subaru optical observations of the old pulsar PSR B0950+08"Astronomy and Astrophysics. 394 2. 633-639 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hoshino, M: "Nonthermal Electrons at High Mach Number Shocks : Electron Shock Surfing Acceleration"The Astrophysical Journal. 572 2. 880-887 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Iwamoto: "Relativistic Outflow of Electron-Positron Pair Plasmas from a Wien Equilibrium"Astrophysical Journal. 565. 163-173 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Kino: "Energetics of TeV Blazars and Physical Constraints on Their Emission Regions"Astrophysical Journal. 564. 97-107 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] J.Kataoka: "Characteristic X-Ray Variability of TeV Blazars : Probing the Link between the Jet and the Central Engine"Astrophysical Journal. 560. 659-674 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Enoki: "Effects of Formation Epoch Distribution on X-Ray Luminosity and Temperature Functions of Galaxy Clusters"Astrophysical Journal. 556. 77-86 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Watarai, K.: "Slim Disk Model for Ultra Luminous X-Ray Sources"ApJ. 549. L77-L80 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Takahashi, R.: "Microlens of Bright Quasars"PASJ. 53. 387-393 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Fujimoto, S.: "Nucleosynthesis inside Supernova-Driven Supercritical Accretion Disks"PASJ. 53. 509-515 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Negoro, H.: "Temporal and Spectral Variations of the Superposed Shot as Causes of Power Spectral Density and Hard Time Lags of Cygnus X--1"ApJ. 554. 528-533 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hosokawa, T.: "Theoretical Models of QSO Luminosity Function"PASJ. 53. 861-869 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Watarai, K.: "Slim Disk : Viscosity Prescriptions and Observational Implications"PASJ. 53. 915-921 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Machida, M.: "Convection-Dominated Magnetized Accretion Flow into Black Holes"PASJ Letters. 53. L1-L4 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kudoh, T.: "Effect of a Magneto-Rotational Instability on Jets from Accretion Disks"PASJ. 54. 121-130 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Fujimoto, S.: "Nucleosynthesis inside Supernova-Driven Supercritical Accretion Disks"PASJ. 53. 509-515 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Negoro, H.: "Temporal and Spectral Variations of the Superposed Shot as Causes of Power Spectral Density and Hard Time Lags of Cygnus X--1"ApJ. 554. 528-533 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hosokawa, T.: "Theoretical Models of QSO Luminosity Function"PASJ. 53. 861-869 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Watarai, K.: "Slim Disk : Viscosity Prescriptions and Observational Implications"PASJ. 53. 915-921 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Machida, M.: "Convection-Dominated Magnetized Accretion Flow into Black Holes"PASJ Letters. 53. L1-L4 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kusoh, T.: "Effect of a Magneto-Rotational Instability on Jets from Accretion Disks"PASJ. 54. 121-130 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hirotani, K.: "Gamma-ray Emission from an Outer-Gap Accelerator : Constraints on Magnetospheric Current, Magnetic Inclination, and Distance for PSR 1055-52"Astrophys. J.. 564. 369-378 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Boettcher, M.: "An Analytic Function Fit to Monte Carlo X-Ray and γ-Ray Spectra from Thomson Thick Thermal/Nonthermal Hybrid Plasmas"Astrophysical Journal, Supplement Series. 135. 1-5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Wang, J.-M.: "Blob Ejection from Advection-dominated Accretion Flow. II. The Multiwavelength Properties of Light Curves"Astrophysical Journal, Supplement Series. 138. 249-263 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakayama, M.: "Properties of photoionized gas in accretion-powered sources"Astronomy and Astrophysics. 375. 328-337 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yonetoku, D.: "Nonequilibrium Ionization States of Gamma-Ray Burst Environments"Astrophysical Journal. 557. L23-L26 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ioka: "Peak Luminosity-Spectral Lag Relation Caused by the Viewing Angle of the Collimated Gamma-Ray Bursts"Astrophys. J. Letters. 554. L163-L167 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ioka: "Microlensing of collimated Gamma-Ray Burst afterglows"Astrophys. J.. 561. 703-707 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Nakamura: "Jets and Central Engine of GRBs"Prog. Theor. Phys. supplement. 143. 50-77 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Hirasawa: "Vortex Configurations, Oscillations and Pinning in Neutron Star Crusts"ApJ. 563. 267-275 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Zenitani, S: "The Generation of nonthermal particles in the relativistic magnetic reconnection of pair plasmas"ApJ Lett.. 562. L63-L66 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hoshino, M.: "Nonthermal particle acceleration in shock front region : "Shock surfing acceleration""Prog. Theor. Phys. Suppl.. 143. 149-181 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hoshino, M: "Suprathermal electron acceleration in magnetic reconnection"J. Geophy. Res. 106. 25979-25997 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Oka, M.: "Acceleration of Interstellar Helium Pickup Ions at the Earth's Bow Shock : GEOTAIL Observation"Geophys. Res. Lett.. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Terasawa, T.: "Cosmic plasmas : their research frontiers"Science and Technology of Advanced Materials. 2. 461-472 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Treumann, R.A.: "Electron acceleration in the heliosphere"Space Sci. Rev.. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Mizuta: "Numerical Analysis of Jets Produced by Intense Lasers"Astrophysical J.. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Takabe: "Astrophysics with Intense and Ultra-intense Lasers : Laser Astrophysics"Progress of Theoretical Physics Supplement. 143. 202-265 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.G.Kang: "Blast-wave-sphere Interaction using a Laser-produced Plasmas : An Experiment Motivated by Supernova 1987A"Phys. Rev. E. 64. 047402-1-047402-4 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.G.Kang: "Laboratory Simlulation of the Collision of Supernova 1987A with its Circumstellar Ring Nebula"Plasma Physics Reports. 27. 843-851 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Morita: "Model Calculation and Experiment of Photo-ionized Plasmas in Relevance to Laboratory Astrophysics"J. Quantum Spectroscopic Radiation Transfer. 70. 519-530 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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