2010 Fiscal Year Final Research Report
A systematic observational study of magnetic amplification mechanisms at post shock regions in non-thermal supernova remnants
| Project/Area Number |
21840060
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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 |
Astronomy
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
YAMAGUCHI Hiroya The Institute of Physical and Chemical Research, 玉川高エネルギー宇宙物理研究室, 基礎科学特別研究員 (00513467)
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| Project Period (FY) |
2009 – 2010
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| Keywords | X線天文学 / 宇宙線加速 / 超新星残骸 |
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| Research Abstract |
We observed several supernova remnants (SNRs) in a low-density interstellar medium, and found no evidence of magnetic amplification at the post shock region. It is suggested that the interaction between the SNR's shock and interstellar cloud has an important role in cosmic-ray acceleration. In addition, we discovered recombining plasmas in a couple of SNRs, for the first time. Since SNRs are normally observed to have ionizing plasmas, these results are particularly surprising and changing our understanding of the SNR's evolution.
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