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Study of High Energy Activity in the Milky Way Using Spatial and Time Fluctuations of the Galactic Ridge X-ray Emission

Research Project

Project/Area Number 25887028
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionShizuoka University

Principal Investigator

HIDEKI Uchiyama  静岡大学, 教育学部, 講師 (50708435)

Project Period (FY) 2013-08-30 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsX線天文学 / 天の川銀河
Outline of Final Research Achievements

Using the Galactic plane data of Suzaku, I measured the spatial intensity fluctuation of the Galactic ridge X-ray emission (GRXE). I revealed that the combined intensity of the GRXE and cosmic X-ray background fluctuates about 3.6~8.1 % (1 sigma) over about 10 pc, except for systematic errors. This fluctuation is consistent with the prediction of the case that the GRXE is the superposition of many faint point sources.
I also studied the spatial profile of the highly ionized iron line intensity ratio over a few hundred pc. It suggests that the origin of the GRXE possibly differs in the disk and bulge regions.
Based on these studies, I also developed an educational material for high school students to study the Bohr model using Suzaku data.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • Research Products

    (3 results)

All 2015 2014 2013

All Presentation (3 results)

  • [Presentation] 天の川銀河拡散X線放射のarcminスケールでの空間的揺らぎの測定2015

    • Author(s)
      内山 秀樹
    • Organizer
      日本天文学会2015年春季年会
    • Place of Presentation
      大阪大学 (大阪府)
    • Year and Date
      2015-03-18 – 2015-03-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] The Difference of the Galactic Ridge X-ray Emission between the Galactic Plane and Bulge Regions2014

    • Author(s)
      Hideki Uchiyama, Masayoshi Nobukawa, Shinya Nakashima
    • Organizer
      Suzaku+MAXI Conference 2014 Expanding the Frontiers of the X-ray Universe
    • Place of Presentation
      愛媛大学 (愛媛県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 天の川銀河リッジ放射バッククグラウンド推定モデルの構築2013

    • Author(s)
      内山秀樹
    • Organizer
      日本天文学会2013年秋季年会
    • Place of Presentation
      東北大学 (宮城県)
    • Related Report
      2013 Annual Research Report

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Published: 2013-09-12   Modified: 2019-07-29  

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