Gamma-ray emission and particle acceleration mechanisms of solar flares
| Project/Area Number |
24840031
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Hiroshima University |
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Principal Investigator |
TANAKA Yasuyuki 広島大学, 宇宙科学センター, 特任助教 (90633941)
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| Project Period (FY) |
2012-08-31 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 太陽フレア / ガンマ線 / 粒子加速 |
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| Research Abstract |
Since the launch in 2008, Fermi-LAT has detected a lot of solar flare gamma-rays over several tens of events. The MeV/GeV gamma-ray spectra showed clear and significant turnover at several hundreds of MeV, indicating that the gamma-rays are produced via pion-decay process. The large photon statistics allowed us to pin-down the location of the emission region and we found that the gamma-ray emission site is around the Active Region on the solar surface. This implies that high-energy protons are produced at the Active region and that turbulent acceleration would be the most plausible option.
Fermi data analysis for Active Galactic Nuclei (AGN) were also performed. In particular, 2 very-high-energy gamma-ray photons were detected from the close vicinity of the z=1.1 blazar PKS 0426-380.
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Report
(3 results)
Research Products
(46 results)
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[Journal Article] High-Energy Gamma-Ray Emission From Solar Flares: Summary of Fermi LAT Detections and Analysis of Two M-Class Flares2014
Author(s)
M. Ackermann, M. Ajello, A. Albert, A. Allafort, L. Baldini, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, E. Bissaldi, E. Bonamente, E. Bottacini, and 150 co-authors (including Y. Tanaka) (Corresponding authors: Y.Tanaka, A. Allafort, N. Giglietto, N. Omodei, V. Petrosian)
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Journal Title
Astrophysical Journal
Volume: in press
Related Report
Peer Reviewed
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[Journal Article] Dense Optical and Near-infrared Monitoring of CTA 102 during High State in 2012 with OISTER : Detection of Intra-night "Orphan Polarized Flux Flare"2014
Author(s)
Itoh, R., Tanaka, Yasuyuki T. ; F ukazawa, Yasushi ; Kawabata, Koji S. ; Kawaguchi, Kenji ; Moritani, Yuki ; Takaki, Katsutoshi ; Ue no, Issei ; Uemura, Makoto ; Akit aya, Hiroshi ; Yoshida, Michitoshi ; Ohsugi, Takashi ; Hanayama, Hidekazu ; Miyaji, Takeshi ; Kaw ai, Nobuyuki
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Journal Title
The Astrophysical Journal Letters
Volume: 768(Web)
Issue: 2
Pages: 1-5
DOI
Related Report
Peer Reviewed
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[Journal Article] Fermi-LAT and Suzaku observations of the radio galaxy Centaurus B2013
Author(s)
Katsuta J, Tanaka Y T, Stawarz L, O'Sullivan S P, Cheung C C, Kataoka J, Funk S, Yuasa T, Odaka H, Takahashi T, and Svoboda J
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Journal Title
Astronomy & Astrophysics
Volume: 550
Pages: 66-76
DOI
Related Report
Peer Reviewed
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[Journal Article] Minute-scale Rapid Variability of the Optical Polarization in the Narrow-line Seyfert 1 Galaxy PMN J0948+00222013
Author(s)
Itoh, Ryosuke ; Fukazawa, Yasushi ; Tanaka, Yasuyuki T. ; Abe, Yuhei ; Akitaya, Hiroshi ; Arai, Akira ; Hayashi, Masahiko ; Hori, Takafumi ; Isogai, Mizuki ; Izumiura , Hideyuki ; Kawabata, Koji S. ; Kawai, Nobuyuki ; Kuroda, Daisuke ; Miyanoshita, Ryo ; Moritani, Yuki ; Morokuma, Tomoki ; Nagayama, Takahiro ; Nakamoto, Jumpei ; Nakata, Chikako, et al.
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Journal Title
The Astrophysical Journal Letters
Volume: 775(Web)
Issue: 1
Pages: 26-26
DOI
Related Report
Peer Reviewed
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[Journal Article] Dense Optical and Near-infrared Monitoring of CTA 102 during High State in 2012 with OISTER : Detection of Intra-night2013
Author(s)
R Itoh, Y Fukazawa, Y T Tanaka, Y Abe, H Akitaya, A Arai, M Hayashi, T Hori, M Isogai, H Izumiura, K S Kawabata, N Kawai, D Kuroda, R Miyanoshita, Y Moritani, T Morokuma, T Nagayama, J Nakamoto, C Nakata, Y Oasa, and 18 co- authors
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Journal Title
Orphan Polarized Flux Flare
Volume: 768
Related Report
Peer Reviewed
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[Journal Article] Short-term variability of x-rays from accreting neutron star vela X-1. I. Suzaku observations2013
Author(s)
Odaka, H., Khangulyan, D., Tanaka, Y.T., Watanabe, S., Takahashi, T., Makishima, K.
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Journal Title
Astrophysical Journal
Volume: 780
Issue: 1
Pages: 70-86
DOI
Related Report
Peer Reviewed
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[Journal Article] High-Energy Gamma-Ray Emission From Solar Flares : Summary of Fermi LAT Detections and Analysis of Two M-Class Flares
Author(s)
M Ackermann, M Ajello, A Albert, A Allafort, L Baldini, G Barbiellini, D Bastieri, K Bechtol, R Bellazzini, E Bissaldi, E Bonamente, E Bottacini, and 150co-authors (including Y Tanaka) (Correspondingauthors : Y Tanaka, A Allafort, N Giglietto, N Omodei, and V Petrosian)
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Journal Title
Astrophysical Journal
Volume: (in press)
Related Report
Peer Reviewed
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