Search for dark stars and planets by the grabitaional microlensing method

利用引力微透镜法寻找暗恒星和行星

• 批准号: 23540339
• 负责人: MURAKI Yasushi
• 金额: $ 3.24万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540339/
• 关键词: 太陽系外惑星; 重力レンズ効果; ダークマター; 褐色矮星; 暗黒天体; MOA; スーパーアース; 系外惑星; 重力レンズ; 暗天体; ニュージーランド; 岩石型系外惑星

The Japan-NZ astronomy collaboration known as MOA (Microlensing Observations in Astrophysics) installed a 1.8m telescope at Mt John in 2005. Since that time more than 500 microlensing events have been found each year towards the galactic bulge.This resulted in the discovery of 53 extra-solar planets orbiting stars in the galactic disc and the galactic bulge. These planets were found just beyond the snowlines of their host stars. This is the region of maximum sensitivity of the microlensing technique, and it also the region where ice-giant and gas-giant planets form according to the core accretion theory. The data on these planets complements data being obtained on closer-in planets by the radial velocity and transit techniques. In addition to the above discoveries, a new class of extra-solar planets was discovered by MOA. These planets are not bound to stars. They have masses similar to that of Jupiter, and they are approximately as abundant as stars in the galaxy.

日本纽约市的天文学合作被称为MOA（天体物理学中的微透明观测）在2005年在约翰山安装了180万个望远镜。由于那时，每年发现了500多个微透明事件，用于银河系凸起。这导致了53个超极的行星在Galactic Discic和Galactic Burge和Galactic Bulge的发现，这导致了53个超极的行星。 这些行星在他们的宿主明星的雪线之外发现。 这是微晶技术的最大灵敏度区域，也是根据核心增强理论形成冰巨型和气体行星的区域。这些行星上的数据补充了通过径向速度和过境技术在近距离行星上获得的数据。 除上述发现外，MOA还发现了一类新的明显行星。这些行星与恒星无关。它们的质量与木星类似，它们的质量大约与银河系中的恒星一样丰富。

项目成果

OGLE-2008-BLG-510: First automated real-time detection of a weak microlensing anomaly - brown dwarf or stellar binary?

OGLE-2008-BLG-510：首次自动实时检测弱微透镜异常 - 棕矮星还是双星？

• DOI: 10.1111/j.1365-2966.2012.21233.x
• 发表时间: 2008
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8

MOA-2011-BLG-293Lb: A TEST OF PURE SURVEY MICROLENSING PLANET DETECTIONS

• DOI: 10.1088/0004-637x/755/2/102
• 发表时间: 2012-01
• 期刊: The Astrophysical Journal
• 作者: J. Yee;Y. Shvartzvald;A. Gal-yam;I. Bond;A. Udalski;S. Kozłowski;C. Han;A. Gould;J. Skowron;D. Suzuki;F. Abe;David P. Bennett;C. Botzler;P. Chote;M. Freeman;A. Fukui;K. Furusawa;Y. Itow;S. Kobara;C. Ling;K. Masuda;Y. Matsubara;N. Miyake;Yasushi Muraki;Kantaro Ohmori;K. Ohnishi;N. Rattenbury;T. Saito;D. Sullivan;T. Sumi;K. Suzuki;W. Sweatman;S. Takino;P. Tristram;K. Wada;M. Szymański;M. Kubiak;G. Pietrzyński;G. Pietrzyński;I. Soszyński;R. Poleski;K. Ulaczyk;Ł. Wyrzykowski;Ł. Wyrzykowski;P. Pietrukowicz;William H. Allen;L. Almeida;V. Batista;M. Bos;G. Christie;D. Depoy;S. Dong;Jack D. Drummond;I. Finkelman;B. Gaudi;E. Gorbikov;C. Henderson;D. Higgins;Francisco Jablonski;S. Kaspi;I. Manulis;D. Maoz;J. Mccormick;D. McGregor;L. Monard;D. Moorhouse;J. A. Muñoz;T. Natusch;H. Ngan;E. Ofek;R. Pogge;R. Santallo;Thiam-Guan Tan;G. Thornley;I. Shin;J.-Y. Choi;S.-Y. Park;C.‐U. Lee;J. Koo

Two topics from MOA collaboration; the q-ratio of binary lenses and the fundamental and overtone of Red Variable Stars

MOA 合作的两个主题；

• 发表时间: 2012
• 作者: Konstantinos Dimopoulos;Kazunori Kohri;David H. Lyth;Tomohiro Matsuda;Y. Ｍuraki
• 通讯作者: Y. Ｍuraki

PLANETARY AND OTHER SHORT BINARY MICROLENSING EVENTS FROM THE MOA SHORT-EVENT ANALYSIS

• DOI: 10.1088/0004-637x/757/2/119
• 发表时间: 2012-03
• 期刊: The Astrophysical Journal
• 作者: David P. Bennett;T. Sumi;I. Bond;K. Kamiya;F. Abe;C. Botzler;A. Fukui;K. Furusawa;Y. Itow;A. Korpela;P. Kilmartin;C. Ling;K. Masuda;Y. Matsubara;N. Miyake;Yasushi Muraki;K. Ohnishi;N. Rattenbury;T. Saito;D. Sullivan;D. Suzuki;W. Sweatman;P. Tristram;K. Wada;P. Yock

NZでの天文観測ー重力レンズ効果を利用した暗黒天体の探索

新西兰的天文观测 - 使用引力透镜寻找黑暗物体

• 作者: T. Kondo;H. Utsunomiya;S. Goriely;I. Daoutidis;C. Iwamoto;H. Akimune;A. Okamoto;T. Yamagata;M. Kamata;O. Itoh;H. Toyokawa;Y.-W. Lui;H. Harada;F. Kitatani;S. Hilaire;and A.J. Koning;Yasushi Muraki
• 通讯作者: Yasushi Muraki