Tomographic Imaging of the Velocity and Magnetic Fields in the Sun's Atmosphere

太阳大气中速度和磁场的层析成像

基本信息

  • 批准号:
    0632399
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2006
  • 资助国家:
    美国
  • 起止时间:
    2006-03-29 至 2010-03-31
  • 项目状态:
    已结题

项目摘要

The proposal is to develop an instrument that can simultaneously measure the sound speed and magnetic fields at three heights in the solar atmosphere. The instrument will use magneto-optical filters tuned to the solar absorption lines at 422 nm (Ca I), 589 nm (Na D2), and 770 nm (K) to make measurements of Doppler velocities and longitudinal magnetic field. These lines form in the mid- and low-chromosphere and photosphere, respectively. In addition, the instrument will also use a Fabry-Perot etalon as a narrowband filter to measure the intensity variations of the 1083 nm (He I) line that is formed high in the chromosphere and which shows the location of the "foot points" of coronal holes. Together, the four lines will allow studying wave motions throughout the solar atmosphere. The instrument will record images of the Sun every 10 seconds with a spatial resolution of 1 arc-second. Thus, the project will be fostering the development of existing magneto-optical filter technology to a new level. Upon construction, the telescope will be tested at South Pole for a long period of uninterrupted observations. Both the local and global helioseismic analysis procedures will be utilized to identify and to characterize different types of waves present in the solar atmosphere. These observations will allow determining the structure and dynamics of the Sun's atmosphere through seismic measurements and, thus, improve the atmosphere models, assess the role of waves in heating the chromosphere/corona and driving the solar wind, and better understand how the Sun's atmosphere couples to the interior. The broader impact of the proposed project is two fold. First, there is a potential benefit to the science and to the society because it is believed that the solar atmosphere is a "home" to many phenomena that can have a direct effect on the solar activity, including flares, coronal mass ejections, and the solar wind. Understanding the structure and dynamics of the solar atmosphere will therefore lead to a better understanding of the Sun-Earth connection. The collected data will be made available to other researchers at DVDs. The broader audience of general public will be reached through presentations at high schools, libraries, and community events, and news articles in the general press. Most of the research materials will also be placed in the Web.
该提议是开发一种仪器,可以同时测量太阳大气层三个高度的声速和磁场。该仪器将使用调谐到422 nm(Ca I)、589 nm(Na D2)和770 nm(K)太阳吸收线的磁光滤波器来测量多普勒速度和纵向磁场。这些谱线分别形成于中色球层和低色球层以及光球层。此外,该仪器还将使用法布里-珀罗标准具作为窄带滤波器,以测量在色球层高处形成的1083 nm(He I)线的强度变化,该线显示了冕洞“脚点”的位置。这四条线将共同研究整个太阳大气层的波动。该仪器将每10秒记录一次太阳图像,空间分辨率为1弧秒。因此,该项目将促进现有磁光滤波器技术的发展到一个新的水平。望远镜建成后,将在南极进行长时间不间断观测的测试。将利用当地和全球日震分析程序来确定和描述太阳大气中存在的不同类型的波。这些观测将有助于通过地震测量确定太阳大气层的结构和动态,从而改进大气模型,评估波在加热色球层/日冕和驱动太阳风方面的作用,并更好地了解太阳大气层如何与内部耦合。拟议项目的更广泛影响有两个方面。首先,这对科学和社会都有潜在的好处,因为人们认为太阳大气层是许多现象的“家园”,这些现象可以对太阳活动产生直接影响,包括耀斑、日冕物质抛射和太阳风。因此,了解太阳大气层的结构和动态将有助于更好地了解太阳与地球的联系。收集的数据将提供给其他研究人员的DVD。将通过在高中、图书馆和社区活动中的演讲以及一般媒体上的新闻文章,接触到更广泛的公众。大多数研究材料也将放在网上。

项目成果

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Stuart Jefferies其他文献

Stuart Jefferies的其他文献

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{{ truncateString('Stuart Jefferies', 18)}}的其他基金

Collaborative Research: Using Gravity Waves to Probe the Solar Atmosphere
合作研究:利用重力波探测太阳大气
  • 批准号:
    1829258
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Using Gravity Waves to Probe the Solar Atmosphere
合作研究:利用重力波探测太阳大气
  • 批准号:
    1341755
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Tomographic Imaging of the Velocity and Magnetic Fields in the Sun's Atmosphere
太阳大气中速度和磁场的层析成像
  • 批准号:
    0338251
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Mapping the Sound Speed Structure of the Sun's Atmosphere
绘制太阳大气的声速结构图
  • 批准号:
    0087541
  • 财政年份:
    2001
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
U.S.-Japan Cooperative Research: Probing the Solar Interior and Atmosphere by Oscillations
美日合作研究:通过振荡探测太阳内部和大气
  • 批准号:
    9417091
  • 财政年份:
    1995
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Probing the Solar Interior and Atmosphere from the Geographic South Pole
从地理南极探测太阳内部和大气
  • 批准号:
    9219515
  • 财政年份:
    1993
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant

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非小细胞肺癌Biomarker的Imaging MS研究新方法
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