Systematic KMTNet Planetary Anomaly Search. VIII. Complete Sample of 2019 Subprime Field Planets
Systematic KMTNet Planetary Anomaly Search. VIII. Complete Sample of 2019 Subprime Field Planets
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DOI：
10.3847/1538-3881/accb8f
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发表时间：
2023-02
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影响因子：
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通讯作者：
Y. Jung;W. Zang;Hanyue Wang;C. Han;A. Gould;A. Udalski;M. Albrow;S. Chung;K. Hwang;Y. Ry
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作者：
Y. Jung;W. Zang;Hanyue Wang;C. Han;A. Gould;A. Udalski;M. Albrow;S. Chung;K. Hwang;Y. Ry
我们在2019年观测季完成了KMT AnomalyFinder系统统一方法在21个KMT次级场中发现的所有微透镜行星（和“可能行星”）的发表，即KMT-2019- blg -0298、KMT-2019- blg -1216、KMT-2019- blg -2783、OGLE-2019-BLG-0249、OGLE-2019-BLG-0679（行星），以及OGLE-2019-BLG-0344和KMT-2019- blg -0304（可能行星）。这五颗行星的平均对数质量比测量值分别为（- 2.6,- 3.6,- 2.5,- 2.2,- 2.3），中位质量估计值分别为（1.81,0.094,1.16,7.12,3.34）M Jup，中位距离估计值分别为（6.7,2.7,5.9,6.4,5.6）kpc。这些行星的主要科学兴趣在于，它们完成了2019年的AnomalyFinder样本，该样本总共有25颗行星可能进入统计样本。根据五项测试的集合，我们发现与2018年AnomalyFinder分析中先前发表的33颗行星在统计上是一致的。在2018-2019年的58颗行星中，有23颗是由AnomalyFinder新发现的。在统计精度范围内，一半的行星有苛性交叉，而另一半则没有；同样数量的被探测到的行星是由主要和次要的图像光曲线扰动引起的；来自国民党主要领域和次级领域的人数相同。
We complete the publication of all microlensing planets (and “possible planets”) identified by the uniform approach of the KMT AnomalyFinder system in the 21 KMT subprime fields during the 2019 observing season, namely, KMT-2019-BLG-0298, KMT-2019-BLG-1216, KMT-2019-BLG-2783, OGLE-2019-BLG-0249, and OGLE-2019-BLG-0679 (planets), as well as OGLE-2019-BLG-0344 and KMT-2019-BLG-0304 (possible planets). The five planets have mean log mass ratio measurements of (−2.6, −3.6, −2.5, −2.2, −2.3), median mass estimates of (1.81, 0.094, 1.16, 7.12, 3.34) M Jup, and median distance estimates of (6.7, 2.7, 5.9, 6.4, 5.6) kpc, respectively. The main scientific interest of these planets is that they complete the AnomalyFinder sample for 2019, which has a total of 25 planets that are likely to enter the statistical sample. We find statistical consistency with the previously published 33 planets from the 2018 AnomalyFinder analysis according to an ensemble of five tests. Of the 58 planets from 2018–2019, 23 were newly discovered by AnomalyFinder. Within statistical precision, half of the planets have caustic crossings, while half do not; an equal number of detected planets result from major- and minor-image light-curve perturbations; and an equal number come from KMT prime fields versus subprime fields.