KMT-2018-BLG-0029Lb: A Very Low Mass-Ratio Spitzer Microlens Planet
KMT-2018-BLG-0029Lb: A Very Low Mass-Ratio Spitzer Microlens Planet
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KMT-2018-BLG-0029Lb：质量比极低的斯皮策微透镜行星
DOI：
10.5303/jkas.2020.53.1.9
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
S. Mao
中科院分区：
文献类型：
--
作者：
A. Gould;Y. Ryu;S. Novati;W. Zang;M. Albrow;Sun;C. Han;K. Hwang;Y. Jung;I. Shin;Y. Shvartzvald;J. Yee;S. Cha;Dong;Hyoun;Seung;Chung;Dong;Yongseok Lee;Byeong;R. Pogge;C. Beichman;G. Bryden;S. Carey;B. Gaudi;C. Henderson;Wei Zhu;P. Fouqu'e;M. Penny;A. Petric;T. Burdullis;S. Mao
KMT-2018-BLG-0029Lb的$q=1.81\pm 0.20\x 10^-5}$，是迄今为止所有微透镜行星中最低的行星-宿主质量比$q$。因此，它是第一颗探测到$q=5$--10$乘以10^{-5}$的表面“堆积”以下的行星。这一事件被斯皮策观察到，产生了微透镜-视差测量。结合在焦散交叉过程中有限源效应对爱因斯坦半径E的测量，这些测量结果表明主机M_{\Rm主机}=1.14^{+0.10}_{-0.12}\，M_\OOT$和行星$M_{\Rm行星}=7.59^{+0.75}_{-0.69}，M_\Oplus$，系统距离$D_L=3.38^{+0.22}_{-0.26}，\，{\rm kpc}$和预计分离$a_\perp=4.27^{+0.21}_{-0.23}\，{\rm au}$。混合光比微透镜光源亮很多，这似乎是由于透镜的原因，可以立即以高分辨率观察到。
At $q=1.81\pm 0.20 \times 10^{-5}$, KMT-2018-BLG-0029Lb has the lowest planet-host mass ratio $q$ of any microlensing planet to date by more than a factor of two. Hence, it is the first planet that probes below the apparent "pile-up" at $q=5$--10 $\times 10^{-5}$. The event was observed by {\it Spitzer}, yielding a microlens-parallax $\pi_{\rm E}$ measurement. Combined with a measurement of the Einstein radius $\theta_{\rm E}$ from finite-source effects during the caustic crossings, these measurements imply masses of the host $M_{\rm host}=1.14^{+0.10}_{-0.12}\, M_\odot$ and planet $M_{\rm planet} = 7.59^{+0.75}_{-0.69}\,M_\oplus$, system distance $D_L = 3.38^{+0.22}_{-0.26}\,\,{\rm kpc}$ and projected separation $a_\perp = 4.27^{+0.21}_{-0.23}\,{\rm au}$. The blended light, which is substantially brighter than the microlensed source, is plausibly due to the lens and could be observed at high resolution immediately.
DOI：
10.1111/j.1365-2966.2009.15098.x
发表时间：
2009-05
影响因子：
4.8
作者：
M. Albrow;K. Horne;D. Bramich;P. Fouqué;V. R. Miller;J. Beaulieu;C. Coutures;C. Coutures;J. Menzies;A. Williams;V. Batista;D. Bennett;S. Brillant;A. Cassan;S. Dieters;D. Prester;J. Donatowicz;J. Greenhill;N. Kains;S. Kane;D. Kubas;J. Marquette;K. Pollard;K. Sahu;Y. Tsapras;Y. Tsapras;J. Wambsganss;M. Zub
通讯作者：
M. Albrow;K. Horne;D. Bramich;P. Fouqué;V. R. Miller;J. Beaulieu;C. Coutures;C. Coutures;J. Menzies;A. Williams;V. Batista;D. Bennett;S. Brillant;A. Cassan;S. Dieters;D. Prester;J. Donatowicz;J. Greenhill;N. Kains;S. Kane;D. Kubas;J. Marquette;K. Pollard;K. Sahu;Y. Tsapras;Y. Tsapras;J. Wambsganss;M. Zub