Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification

Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification
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DOI：
10.1126/science.1100714
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发表时间：
2004-08
期刊：
Science
影响因子：
56.9
通讯作者：
F. Abe;David P. Bennett;I. Bond;S. Eguchi;Y. Furuta;J. Hearnshaw;K. Kamiya;P. Kilmartin;Y. Kurata;K. Masuda;Y. Matsubara;Yasushi Muraki;S. Noda;K. Okajima;A. Rakich;N. Rattenbury;T. Sako;T. Sekiguchi;D. Sullivan;T. Sumi;P. Tristram;T. Yanagisawa;P. Yock;A. Gal-yam;Y. Lipkin;D. Maoz;E. Ofek;A. Udalski;O. Szewczyk;K. Żebruń;I. Soszyński;M. Szymański;M. Kubiak;G. Pietrzyński;G. Pietrzyński;L. Wyrzykowski
F. Abe;David P. Bennett;I. Bond;S. Eguchi;Y. Furuta;J. Hearnshaw;K. Kamiya;P. Kilmartin;Y. Kurata;K. Masuda;Y. Matsubara;Yasushi Muraki;S. Noda;K. Okajima;A. Rakich;N. Rattenbury;T. Sako;T. Sekiguchi;D. Sullivan;T. Sumi;P. Tristram;T. Yanagisawa;P. Yock;A. Gal-yam;Y. Lipkin;D. Maoz;E. Ofek;A. Udalski;O. Szewczyk;K. Żebruń;I. Soszyński;M. Szymański;M. Kubiak;G. Pietrzyński;G. Pietrzyński;L. Wyrzykowski
中科院分区：
综合性期刊1区
文献类型：
--
作者：
F. Abe;David P. Bennett;I. Bond;S. Eguchi;Y. Furuta;J. Hearnshaw;K. Kamiya;P. Kilmartin;Y. Kurata;K. Masuda;Y. Matsubara;Yasushi Muraki;S. Noda;K. Okajima;A. Rakich;N. Rattenbury;T. Sako;T. Sekiguchi;D. Sullivan;T. Sumi;P. Tristram;T. Yanagisawa;P. Yock;A. Gal-yam;Y. Lipkin;D. Maoz;E. Ofek;A. Udalski;O. Szewczyk;K. Żebruń;I. Soszyński;M. Szymański;M. Kubiak;G. Pietrzyński;G. Pietrzyński;L. Wyrzykowski

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本文介绍了引力微透镜事件MOA 2003-BLG-32/OGLE 2003-BLG-219的观测结果，其峰值放大率超过500，是迄今报道的最高放大率。围绕着山峰的连续观测使人们能够灵敏地搜寻围绕着透镜星星运行的行星。没有发现行星。比地球重1.3倍的行星被排除在透镜星星周围大约2.3到3.6个天文单位的投影环形区域的50%之外，天王星质量的行星被排除在0.9到8.7个天文单位之外，比土星重1.3倍的行星被排除在0.2到60个天文单位之外。这是迄今为止在搜寻围绕任何星星运行的太阳系外行星时所达到的最大灵敏区域。
Observations of the gravitational microlensing event MOA 2003-BLG-32/OGLE 2003-BLG-219 are presented, for which the peak magnification was over 500, the highest yet reported. Continuous observations around the peak enabled a sensitive search for planets orbiting the lens star. No planets were detected. Planets 1.3 times heavier than Earth were excluded from more than 50% of the projected annular region from approximately 2.3 to 3.6 astronomical units surrounding the lens star, Uranus-mass planets were excluded from 0.9 to 8.7 astronomical units, and planets 1.3 times heavier than Saturn were excluded from 0.2 to 60 astronomical units. These are the largest regions of sensitivity yet achieved in searches for extrasolar planets orbiting any star.