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Advanced Study of the Star-Formation Process by High Resolution Imaging with Far-Infrared Interferometer

远红外干涉仪高分辨率成像对恒星形成过程的深入研究

基本信息

批准号：
15002006
负责人：
SHIBAI Hiroshi
金额：
$ 237.95万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Specially Promoted Research
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2007
项目状态：
已结题

项目摘要

The purpose of this research is to reveal the temperature distribution/structure of the dense dust clouds surrounding energetic objects, such as star-forming regions, protoplanetary disks, and nuclear starburst galaxies. It leads us to comprehensive understanding of the radiation transfer process and the density structure in individual interstellar dust clouds based on direct observation. As the representative dust temperature is a few tens K, the observation should be made in the far-infrared wavelength region where the energy spectrum has its peak. .We have developed a balloon-borne far-infrared space intereferometer as the first far-infrared interferometer onboard a scientific balloon. The baseline is 8m at the first flight and 20m later that is required to achieve the spatial resolution of 1 arc second at 100 microns. In addition to this, we invented a new image-reconstruction method of a Fizeau-type interferometer without the delayline device. The delayline device used to be a complicate and delicate device, and sometimes one of the most sritical technological hardle for space-borne interferometer projects. Therefore, the new method is applicable for space projects, such as DARWIN, TPF, etc.The instrument has almost been constructed. However, due to a malfanction of the cryostat, the first flight was postponed in 2008. This flight will be carried out in Brazil as an international collaboration with INPE (Brazilian Space Institute) and University of Sao Paolo.It is expected that this research project will be continued and expanded toward a world-wide space infrared interferometer project in future.

这项研究的目的是揭示周围的高能量物体，如恒星形成区，原行星盘和核星暴星系的致密尘埃云的温度分布/结构。它引导我们基于直接观测全面了解单个星际尘埃云的辐射传输过程和密度结构。由于代表性的尘埃温度为几十K，因此应在能谱有峰值的远红外波长区进行观测。10.我们研制了一个气球载远红外空间干涉仪，这是科学气球上的第一个远红外干涉仪。第一次飞行时的基线为8米，之后为20米，这是在100微米处实现1弧秒的空间分辨率所需的。此外，我们还发明了一种新的不带延迟线的斐索型干涉仪的图像重建方法。延迟线装置是一种复杂精密的装置，有时也是星载干涉仪工程中最关键的技术难题之一。因此，该方法适用于达尔文、TPF等航天项目。然而，由于低温恒温器的故障，首次飞行于2008年推迟。这次飞行将在巴西进行，作为与巴西空间研究所和圣保罗大学的国际合作，预计这一研究项目将继续下去，并在未来扩大到世界范围的空间红外干涉仪项目。