PROPERTIES AND DETECTION LIMITS OF PLANETARY CAUSTIC PERTURBATION INDUCED BY A WIDE-SEPARATION PLANET-猫眼课题宝

宽分离行星引起的行星焦散扰动的性质和探测极限

DOI：

10.3847/0004-637x/819/1/9

发表时间：

2016

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

文献类型：

作者：

Y. Ryu;Sun;K. Lee;H. Kim;D. Han

微透镜实验正在进入下一代调查类型，以频繁采样连续监测宽视场。理论上预测的行星探测对透镜参数的灵敏度可用于建立最大行星探测的观测策略。因此，我们研究了行星焦散线引起的行星信号的检测条件。计算了不同透镜参数下行星焦散线引起的偏离面积，发现偏离面积一般随源半径的增大而增大。然而，当标准化源半径接近一定值时，偏离区域迅速减小，并在相同的标准化源半径处消失，而与行星与其宿主星星之间的质量比和距离无关。我们找到了一个简单的归一化源半径和最大和最小偏差区域的偏差阈值之间的关系。从这个关系式中，我们还找到了行星信号的探测极限作为源半径和偏差阈值的函数的解析条件。此外，我们还比较了行星焦散扰动和自由浮动行星的偏离面积和光变曲线。我们发现，行星焦散扰动可以近似的单透镜光变曲线的行星本身的行星焦散扰动。最后，我们可以期望找到一个低质量的行星与地球的质量，甚至是地球的月球的检测条件，并得出结论，我们的研究结果可能有助于最大的行星检测考虑源类型和测光精度。

Microlensing experiments are entering a next generation of survey types to monitor a wide field of view continuously with a frequent sampling. The theoretically predicted sensitivity of a planet detection on the lensing parameters can be used for the establishment of observational strategies for maximal planet detections. Hence, we investigate the detection condition of planetary signals caused by the planetary caustic. We calculate the deviation area induced by the planetary caustic for various lensing parameters and find that the deviation area generally increases according to the increase of the source radius. However, after the normalized source radius approaches a certain value the deviation area rapidly decreases and disappears at the same normalized source radius, regardless of the mass ratio and the separation between the planet and its host star. We find a simple relation between the normalized source radius and the deviation threshold for the largest and smallest deviation areas. From this relation we also find an analytic condition for the detection limit of the planetary signal as the function of the source radius and the deviation threshold. In addition, we compare the deviation areas and the light curves between the planetary caustic perturbation and a free-floating planet. We find that the planetary caustic perturbation can be approximated by the single-lensing light curve of the planet itself perturbed by the planetary caustic. Finally, we can expect to find a low-mass planet with the Earth’s mass or even that of the Earth's moon from the detection condition and conclude that our findings may help for maximal planet detections considering the source type and the photometric accuracy.

MOA-2010-BLG-328Lb: A SUB-NEPTUNE ORBITING VERY LATE M DWARF?

DOI： 10.1088/0004-637x/779/2/91

发表时间： 2013-09

期刊：

The Astrophysical Journal

影响因子： --

作者：

K. Furusawa;A. Udalski;T. Sumi;D. Bennett;I. Bond;A. Gould;U. Jørgensen;C. Snodgrass;D. Prester;M. Albrow;F. Abe;C. Botzler;P. Chote;M. Freeman;A. Fukui;P. Harris;Y. Itow;C. Ling;K. Masuda;Y. Matsubara;N. Miyake;Y. Muraki;K. Ohnishi;N. Rattenbury;T. Saito;D. Sullivan;D. Suzuki;W. Sweatman;P. Tristram;K. Wada;P. Yock;M. Szymański;I. Soszyński;M. Kubiak;R. Poleski;K. Ulaczyk;G. Pietrzyński;Ł. Wyrzykowski;J.-Y. Choi;G. Christie;D. Depoy;S. Dong;J. Drummond;B. Gaudi;C. Han;L. Hung;K. Hwang;C.‐U. Lee;J. Mccormick;D. Moorhouse;T. Natusch;M. Nola;E. Ofek;R. Pogge;I. Shin;J. Skowron;G. Thornley;J. Yee;K. Alsubai;V. Bozza;P. Browne;M. Burgdorf;S. Novati;P. Dodds;M. Dominik;F. Finet;T. Gerner;S. Hardis;K. Harpsoe;T. Hinse;M. Hundertmark;N. Kains;E. Kerins;C. Liebig;L. Mancini;M. Mathiasen;M. Penny;S. Proft;S. Rahvar;D. Ricci;G. Scarpetta;S. Schäfer;F. Schönebeck;J. Southworth;J. Surdej;J. Wambsganss;R. Street;D. Bramich;I. Steele;Y. Tsapras;K. Horne;J. Donatowicz;K. Sahu;E. Bachelet;V. Batista;T. Beatty;J. Beaulieu;C. S. Bennett;C. Black;R. Bowens-Rubin;S. Brillant;J. Caldwell;A. Cassan;A. Cole;E. Corrales;C. Coutures;S. Dieters;P. Fouqué;J. Greenhill;C. Henderson;D. Kubas;J. Marquette;R. Martin;J. Menzies;B. Shappee;A. Williams;D. Wouters;J. V. van Saders;R. Zellem;M. Zub

通讯作者：

PROPERTIES AND DETECTION LIMITS OF PLANETARY CAUSTIC PERTURBATION INDUCED BY A WIDE-SEPARATION PLANET

宽分离行星引起的行星焦散扰动的性质和探测极限

文献摘要

参考文献

被引文献

相似文献