Probing the origin of the near infrared background excess using gamma-ray emitting objects

• Project/Area Number: 16K13813
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Institute of Physical and Chemical Research (2017-2018); Japan Aerospace EXploration Agency (2016)
• Principal Investigator: Inoue Yoshiyuki 国立研究開発法人理化学研究所, 数理創造プログラム, 上級研究員 (70733989)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 高エネルギー天文学 / 活動銀河核 / 宇宙背景放射 / 宇宙物理 / 天文 / 理論天文学 / 光学赤外線天文学

Outline of Final Research Achievements

The goal of this research is to probe the origin of the cosmic near-infrared background excess using extragalactic gamma-ray objects. For this aim, we have 1) constructed a spectral model for blazar radiation spectra, 2) estimated the gamma-ray attenuation level including the excess assuming various redshift evolution, 3) tried determining the redshift distribution of the excess using the gamma-ray data of blazars. Due to the quality of the data, we could not determine the redshift distribution of the excess itself. For the next step, we are going to constrain the redshift distribution using the current data sets.

Academic Significance and Societal Importance of the Research Achievements

ガンマ線という新たな手法を用いることで、近赤外線背景放射超過成分 の存在可能な距離を制限できる可能性を示した。つまり、宇宙物理学における観測においてもっとも 基本的な情報である「距離」であるが、本研究は超過成分の距離の情報を得る研究の端緒となった。今後、距離が制限できれば、そのエネルギーなどを議論することが初めて可能となり、起源の特定に向けて大きく前進出来ることが期待される。

Research Products

• [Int'l Joint Research] オックスフォード大学(英国)
• [Int'l Joint Research] ストックホルム大学(スウェーデン)
• [Journal Article] Detection of Coronal Magnetic Activity in nearby Active Supermassive Black Holes (2018)
  • Author(s): Inoue Yoshiyuki、Doi Akihiro
  • Journal Title: The Astrophysical Journal Volume: 869 Issue: 2 Pages: 114-114
  • DOI: 10.3847/1538-4357/aaeb95
• [Journal Article] Diffuse X-Ray Emission from the Northern Arc of Loop I Observed with Suzaku (2018)
  • Author(s): Akita Masahiro、Kataoka Jun、Arimoto Makoto、Sofue Yoshiaki、Totani Tomonori、Inoue Yoshiyuki、Nakashima Shinya
  • Journal Title: The Astrophysical Journal Volume: 862 Issue: 1 Pages: 88-88
  • DOI: 10.3847/1538-4357/aacd08
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spatial Distribution of the Milky Way Hot Gaseous Halo Constrained by Suzaku X-Ray Observations (2018)
  • Author(s): Nakashima Shinya、Inoue Yoshiyuki、Yamasaki Noriko、Sofue Yoshiaki、Kataoka Jun、Sakai Kazuhiro
  • Journal Title: The Astrophysical Journal Volume: 862 Issue: 1 Pages: 34-34
  • DOI: 10.3847/1538-4357/aacceb
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High energy gamma rays from nebulae associated with extragalactic microquasars and ultra-luminous X-ray sources (2017)
  • Author(s): Inoue, Y., Lee, S., Tanaka, Y. T., Kobayashi, S. B.
  • Journal Title: ELSEVIER Volume: 90 Pages: 14-19
  • DOI: 10.1016/j.astropartphys.2017.01.012
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Disk Jet Connection in Active Supermassive Black Holes in the Standard Accretion Disk Regime (2017)
  • Author(s): Inoue, Yoshiyuki; Doi, Akihiro; Tanaka, Yasuyuki T.; Sikora, Marek; Madejski, Grzegorz M.
  • Journal Title: ApJ Volume: 840 Issue: 1 Pages: 46-46
  • DOI: 10.3847/1538-4357/aa6b57
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Cherenkov telescope array extragalactic survey discovery potential and the impact of axion-like particles and secondary gamma rays (2017)
  • Author(s): De Franco Andrea、Inoue Yoshiyuki、S?nchez-Conde Miguel A.、Cotter Garret
  • Journal Title: Astroparticle Physics Volume: 93 Pages: 8-16
  • DOI: 10.1016/j.astropartphys.2017.03.010
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evidence for Higher Black Hole Spin in Radio-loud Quasars (2017)
  • Author(s): Schulze Andreas、Done Chris、Lu Youjun、Zhang Fupeng、Inoue Yoshiyuki
  • Journal Title: The Astrophysical Journal Volume: 849 Issue: 1 Pages: 4-4
  • DOI: 10.3847/1538-4357/aa9181
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Baryon Loading Efficiency and Particle Acceleration Efficiency of Relativistic Jets: Cases for Low Luminosity BL Lacs (2016)
  • Author(s): Inoue, Yoshiyuki; Tanaka, Yasuyuki T.
  • Journal Title: ApJ Volume: 828 Issue: 1 Pages: 13-13
  • DOI: 10.3847/0004-637x/828/1/13
  • Peer Reviewed
• [Journal Article] Binary black hole merger rates inferred from luminosity function of ultra-luminous X-ray sources (2016)
  • Author(s): Y. Inoue, Y.T. Tanaka, N. Isobe
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 461 Issue: 4 Pages: 4329-4334
  • DOI: 10.1093/mnras/stw1637
  • Peer Reviewed / Open Access
• [Journal Article] A significant hardening and rising shape detected in the MeV/GeV νFν spectrum from the recently discovered very-high-energy blazar S4 0954+65 during the bright optical flare in 2015 February (2016)
  • Author(s): Y. T. Tanaka, J. Becerra Gonzalez, R. Itoh, J. D. Finke, Y. Inoue, R. Ojha, B. Carpenter, E. Lindfors, F. Krauss, R. Desiante, K. Shiki, Y. Fukazawa, F. Longo, J. McEnery, S. Buson, K. Nilsson, V. Fallah Ramazani, R. Reinthal, L. Takalo, T. Pursimo, W. Boschin
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 4 Pages: 51-51
  • DOI: 10.1093/pasj/psw049
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Mass Loading Efficiency and Particle Acceleration Efficiency of Relativistic Jets: Cases For Low Luminosity BL Lacs (2016)
  • Author(s): 井上芳幸
  • Organizer: 日本天文学会
  • Place of Presentation: 愛媛大学
• [Book] Science with the Cherenkov Telescope Array (2018)
  • Author(s): CTA Consortium
  • Total Pages: 213
  • Publisher: World Scientific Publishing Co. Pte. Ltd.