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首页> 外文会议>Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter pt.2 >JASMINE:galactic structure surveyor
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JASMINE:galactic structure surveyor

机译：JASMINE：银河结构测量师

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摘要

We introduce a Japanese plan of infrared(z-band:0.9μm) space astrometry(JASMINE-project). JASMINE is the satellite (Japan Astrometry Satellite Mission for INfrared Exploration) which will measure distances and apparent motions of stars around the center of the Milky Way with yet unprecedented precision. It will measure parallaxes, positions with the accuracy of 10 micro-arcsec and proper motions with the accuracy of ～4micro-arcsec/year for stars brighter than z=14mag. JASMINE can observe about ten million stars belonging to the bulge components of our Galaxy, which are hidden by the interstellar dust extinction in optical bands. Number of stars with σ/π < 0.1 in the direction of the Galactic central bulge is about 1000 times larger than those observed in optical bands, where π is a parallax and σ is an error of the parallax. With the completely new "map of the bulge in the Milky Way", it is expected that many new exciting scientific results will be obtained in various fields of astronomy. Presently, JASMINE is in a development phase, with a target launch date around 2015. We adopt the following instrument design of JASMINE in order to get the accurate positions of many stars. A 3-mirrors optical system(modified Korsch system)with a primary mirror of ～0.85m is one of the candidate for the optical system. On the astro-focal plane, we put dozens of new type of CCDs for z-band to get a wide field of view. The accurate measurements of the astrometric parameters requires the instrument line-of-sight highly stability and the opto-mechanical highly stability of the payload in the JASMINE spacecraft. The consideration of overall system(bus) design is now going on in cooperation with Japan Aerospace Exploration Agency(JAXA).
机译：介绍日本的红外（z波段：0.9μm）空间天文测量计划（JASMINE项目）。 JASMINE是卫星（日本红外探测星空卫星任务），它将以前所未有的精度测量银河系中心附近恒星的距离和视在运动。对于比z = 14mag更明亮的恒星，它将测量视差，位置，精度为10微弧度/年，并且进行适当的运动，精度为〜4微弧度/年。 JASMINE可以观测到大约一千万颗属于我们银河系凸起部分的恒星，这些恒星被光带中的星际尘埃消灭所隐藏。在银河系中央凸起方向上具有σ/π<0.1的恒星数量大约是在光学带中观察到的恒星数量的1000倍，其中π是视差，而σ是视差的误差。有了全新的“银河系隆起图”，人们有望在天文学的各个领域获得许多令人兴奋的新科学成果。目前，JASMINE处于开发阶段，计划于2015年左右发射。我们采用JASMINE的以下仪器设计，以便获得许多恒星的精确位置。具有〜0.85m的主镜的三镜光学系统（改良的Korsch系统）是该光学系统的候选之一。在天文焦平面上，我们为z波段放置了数十种新型CCD，以获得广阔的视野。精确测量天体参数需要JASMINE航天器的仪器视线高度稳定性和有效载荷的光电机械高度稳定性。目前正在与日本航空航天局（JAXA）合作进行总体系统（总线）设计的考虑。

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