Study of the magnetic-field structure in the jet of active galactic nuclei using the time variation in polarization

利用极化时间变化研究活动星系核射流中的磁场结构

• 批准号: 22540252
• 负责人: UEMURA Makoto
• 金额: $ 2.75万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540252/
• 关键词: 光赤外線天文学; 天文学; 光学赤外線天文学; 偏光; 活動銀河核; ジェット; 降着円盤

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.

我们利用光学偏振的时间变化研究了活动星系核中的射流。在过去观测稀疏的研究中，偏振变化被认为是不稳定的。我们以短节奏进行偏振观测，并使用我们开发的新技术分析数据。结果，我们发现：1）偏振变化往往与时间尺度为数天的短耀斑相关，2）偶尔存在另一个具有长变化时间尺度的偏振分量以及短耀斑。这些新发现发表在参考期刊的 30 篇论文中。

项目成果

Dense Optical and Near-infrared Monitoring of CTA 102 during High State in 2012 with OISTER : Detection of Intra-night "Orphan Polarized Flux Flare"

2012 年使用 OISTER 对 CTA 102 在高态期间进行密集光学和近红外监测：检测夜间“孤儿偏振通量耀斑”

• DOI: 10.1088/2041-8205/768/2/l24
• 发表时间: 2014
• 作者: 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; Take
• 通讯作者: Take

Radio to gamma-ray variability study of blazar S5 0716+714

Blazar S5 0716 714 的无线电到伽马射线变异性研究

• 发表时间: 2013
• 影响因子: 6.5
• 作者: Rani; B.
• 通讯作者: B.

The Structure and Emission Model of the Relativistic Jet in the Quasar 3C 279 Inferred from Radio to High-energy γ-Ray Observations in 2008-2010

2008-2010年射电到高能γ射线观测推断类星体3C 279相对论性喷流的结构和发射模型

• DOI: 10.1088/0004-637x/754/2/114
• 发表时间: 2012
• 作者: Hayashida; et al.
• 通讯作者: et al.

Photopolarimetric Monitoring of Blazars in the Optical and Near-Infrared Bands with the Kanata Telescope. I. Correlations between Flux, Color, and Polarization

使用卡纳塔望远镜对光学和近红外波段的耀变体进行光偏振监测。

• DOI: 10.1093/pasj/63.3.327
• 发表时间: 2012
• 影响因子: 2.3
• 作者: Ikejiri; Uemura; et al.
• 通讯作者: et al.

Multi-wavelength Observations of Blazar AO 0235+164 in the 2008-2009 Flaring State

2008-2009年耀斑状态下Blazar AO 0235 164的多波长观测

• 发表时间: 2012
• 作者: Ackermann; M.
• 通讯作者: M.