2011 Fiscal Year Final Research Report
Multi-wavelength Study for Origin of the Galactic Ride X-ray Emission
| Project/Area Number |
21540249
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Japan Aerospace Exploration Agency |
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Principal Investigator |
EBISAWA Ken 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (70421857)
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| Co-Investigator(Renkei-kenkyūsha) |
KOBAYASHI Naoto 東京大学, 天文学教育研究センター, 准教授 (50280566)
TSUJIMOTO Masahiro 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (10528178)
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| Project Period (FY) |
2009 – 2011
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| Keywords | X線γ線天文学 |
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| Research Abstract |
We have studied origin of the Galactic Ridge X-ray Emission(GRXE) using X-ray satellites and ground-based infrared observatories. We have found that dimmer point X-ray sources have relatively prominent iron K-line emission compared to bright sources. We have carried out infrared spectroscopy of those dim X-ray sources, and found that these sources show molecular absorption lines, which are characteristics of low-temperature stars. We propose these sources are "pre-CVs", the binary stars composed of white dwarfs and late-type stars, in the process of evolution to the cataclysmic variables(CVs).
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