Search for new celestial objects using microlensing effect

利用微透镜效应寻找新的天体

基本信息

批准号：
14002006
负责人：
MURAKI Yasushi
金额：
$ 360.26万
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：
2002
资助国家：
日本
起止时间：
2002 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14002006/
关键词：
gravitational lensing extrasolar planet dark matter extrasolar terrestrial planet planetary science large telescope MACHO Large CCD camera ダークマタターブラックホール恒星

项目摘要

The main goals of the MOA project are the search for non-luminous astrophysical objects comprising a significant fraction of dark matter of the Galaxy, and also the search for Earth-like planets orbiting distant stars in the Galaxy. The phenomenon of gravitational microlensing offers a practical procedure for carrying out both these goals. To accomplish the goals, a wide-field optical telescope of diameter 1.8m was assembled in Japan during 2003. A telescope dome of diameter 8m, and a large CCD camera with 80 million pixels, were also fabricated in Japan at the same time. During 2004, the telescope, dome and camera were installed at the Mt. John Observatory of the University of Canterbury in New Zealand. First light occurred on March 1^<st> 2005.Main results: the first clear discovery of an extra-solar planet by gravitational microlensing occurred in July 2003. The discovery was made jointly by the MOA and OGLE groups. Additional measurements were subsequently made by the Hubble Space Telescope. The planet discovered in this event is similar to Jupiter.Its mass is 2.6 times that of Jupiter, and it orbits a star of 0.63 solar mass at an orbital radius of 4.3 AU.Another Jovian mass planet was found in March 2005. This discovery was made in a microlensing event of high magnification in collaboration with the OGLE, MicroFUN and PLANET/Robonet groups. During April 2005, a Neptune-like planet was found in an event of high magnification in collaboration with the OGLE and MicroFUN groups. Finally, in August 2005, an Earth-like planet was found in collaboration with the PLANET and OGLE/Robonet groups. The latter discoveries imply that our solar system is not a lonely system in our Galaxy

MOA项目的主要目标是寻找无可发光的天体物理物体，其中包括大量的银河系暗物质，以及寻找星系中绕着遥远恒星的类似地球的行星。重力微透镜的现象为执行这两个目标提供了一个实用的程序。为了实现目标，在2003年在日本组装了直径1.8m的宽场光学望远镜。直径为8m的望远镜圆顶，以及带有8000万像素的大型CCD摄像头，同时也制造了8000万像素。 2004年期间，望远镜，圆顶和摄像头是在新西兰坎特伯雷大学的约翰山观测站安装的。第一个光发生在2005年3月1日^<st> 2005年。结果：首次通过重力微覆盖的明确发现发生在2003年7月。该发现是由MOA和OGLE组共同进行的。随后，哈勃太空望远镜进行了其他测量。在此事件中发现的星球与木星相似。它的质量是木星的2.6倍，它在2005年3月发现的轨道半径为4.3 Au。在2005年3月发现的一个轨道半径为0.63太阳能。这一发现是在与Ogle，Microfun和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Robonet和Planet和Robonet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet和Planet一起进行高度验证的发现。 2005年4月，在与Ogle和Microfun组合作的高放大倍率中发现了一个像海王星一样的星球。最终，在2005年8月，与星球和Ogle/Robonet群体合作发现了一个类似地球的星球。后者的发现暗示我们的太阳系不是我们银河系中的孤独系统