2013 Fiscal Year Final Research Report
Study of the magnetic-field structure in the jet of active galactic nuclei using the time variation in polarization
| Project/Area Number |
22540252
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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 | Hiroshima University |
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Principal Investigator |
UEMURA Makoto 広島大学, 宇宙科学センター, 准教授 (50403514)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 光赤外線天文学 |
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| Research Abstract |
We studied the jet in active galactic nuclei using the time variation in optical polarization. The polarization variation was supposed to be just erratic in past studies with sparse observations. We performed polarimetric observations with a short cadence, and analyzed the data with new techniques we have developed. As a result, we found that 1) polarization variations tend to associate with short flares having a time-scale of days, 2) another polarization component having a long variation time-scale is occasionally present, as well as short flares. Those new findings were reported in 30 papers in refereed journals.
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