Systematic KMTNet Planetary Anomaly Search, Paper I: OGLE-2019-BLG-1053Lb, A Buried Terrestrial Planet
Weicheng Zang, Kyu-Ha Hwang, Andrzej Udalski, Tianshu Wang, Wei Zhu, Takahiro Sumi, Jennifer C. Yee, Andrew Gould, Shude Mao, Xiangyu Zhang, Michael D. Albrow, … 展开作者
Weicheng Zang, Kyu-Ha Hwang, Andrzej Udalski, Tianshu Wang, Wei Zhu, Takahiro Sumi, Jennifer C. Yee, Andrew Gould, Shude Mao, Xiangyu Zhang, Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Youn Kil Jung, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Sang-Mok Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Przemek Mróz, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Mariusz Gromadzki, Ian A. Bond, Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Martin Donachie, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Man Cheung Alex Li, Yutaka Matsubara, Yasushi Muraki, Shota Miyazaki, Greg Olmschenk, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Hikaru Shoji, Stela Ishitani Silva, Daisuke Suzuki, Yuzuru Tanaka, Paul J. Tristram, Tsubasa Yamawaki, Atsunori Yonehara, Charles A. Beichman, Geoffery Bryden, Sebastiano Calchi Novati, Sean Carey, B. Scott Gaudi, Calen B. Henderson, Samson Johnson
In order to exhume the buried signatures of "missing planetary caustics" in the KMTNet data, we conducted a systematic anomaly search to the residuals from point-source point-lens fits, based on a modified version of the KMTNet EventFinder algorithm. This search reveals the lowest mass-ratio planetary caustic to date in the microlensing event OGLE-2019-BLG-1053, for which the planetary signal had not been noticed before. The planetary system has a planet-host mass ratio of $q = (1.25 \pm 0.13) \times 10^{-5}$. A Bayesian analysis yields estimates of the mass of the host star, $M_{\rm host} = 0.61_{-0.24}^{+0.29}~M_\odot$, the mass of its planet, $M_{\rm planet} = 2.48_{-0.98}^{+1.19}~M_{\oplus}$, the projected planet-host separation, $a_\perp = 3.4_{-0.5}^{+0.5}$ au, and the lens distance of $D_{\rm L} = 6.8_{-0.9}^{+0.6}$ kpc. The discovery of this very low mass-ratio planet illustrates the utility of our method and opens a new window for a large and homogeneous sample to study the microlensing planet-host mass-ratio function down to $q \sim 10^{-5}$.
Systematic KMTNet Planetary Anomaly Search. VI. Complete Sample of 2018 Sub-Prime-Field Planets
我们完成了对KMTNet Anomalysis确定的所有2018次主场微透镜行星的分析。在9个先前未发表的行星事件中,有6个明显是行星事件(KMT-2018-BLG-0030,KMT-2018-BLG-0087,KMT-2018-BLG-0247,OGLE-2018-BLG-0298,KMT-2018-BLG-2602和OGLE-2018-BLG-1119),而其余3个在性质上是模糊的。此外,有8个先前公布的次主场行星是由Anomalysts算法选出的。连同一篇关于2018年素场行星的配套论文(Gould et al. 2022),这项工作为基于KMTNet数据中识别的行星的行星质量比函数的首次统计分析奠定了基础。正如预期的那样(Zhu et al. 2014),2018年可能进入质量比分析的行星中有一半(17/33)具有非焦散交叉异常。然而,在5个具有行星-宿主质量比$q<10^{-3}$的非焦散异常中,只有1个是通过肉眼发现的(相比之下,12个具有$q>10^{-3}$的异常中有7个是通过肉眼发现的),这表明了半自动异常搜索的重要性。
Testing KMTNet--PRIME Optical--Near-Infrared Source-Color Constraints in KMT-2024-BLG-0211 and KMT-2024-BLG-1522
The University of Osaka(大阪大学);Massey University(梅西大学);Ohio State University(俄亥俄州立大学);Westlake University(西湖大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland, College Park(马里兰大学帕克分校)
Four Giant Planets from 2024 KMTNet Microlensing Campaign
Chungbuk National University(忠北国立大学);University of Warsaw(华沙大学);Massey University(梅西大学);Korea Astronomy and Space Science Institute(韩国天体与空间科学研究所);Tsinghua University(清华大学);University of Canterbury(坎特伯雷大学);Ohio State University(俄亥俄州立大学);University of Science and Technology(科学技术大学);Weizmann Institute of Science(魏茨曼科学研究所);Westlake University(西湖大学);University of Warwick(华威大学);Villanova University(维拉诺瓦大学);Nagoya University(名古屋大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland, College Park(马里兰大学帕克分校);Osaka University(大阪大学);The Catholic University of America(美国天主教大学);The University of Tokyo(东京大学);Japan Aerospace Exploration Agency(日本宇宙航空研究开发机构);Institut d'Astrophysique de Paris(巴黎天体物理研究所);University of Auckland(奥克兰大学);Kanto Gakuin University(关东学院大学);Tel-Aviv University(特拉维夫大学)
Mass Production of 2023 KMTNet Microlensing Planets I: Low Mass Ratio
Korea Astronomy and Space Science Institute(韩国天文与空间科学研究所);Astronomical Observatory, University of Warsaw(华沙大学天文台);Westlake University(西湖大学);Tsinghua University(清华大学);University of Chinese Academy of Sciences(中国科学院大学);Ohio State University(俄亥俄州立大学);University of Canterbury(坎特伯雷大学)
Mass Production of 2023 KMTNet Microlensing Planets. II: Two Planets and A Brown Dwarf
Westlake University(西湖大学);Tsinghua University(清华大学);Korea Astronomy and Space Science Institute(韩国天体宇宙科学研究所);Astronomical Observatory, University of Warsaw(华沙大学天文台);Department of Earth and Space Science, Graduate School of Science, Osaka University(大阪大学理学研究科地球・宇宙科学系);University of Canterbury, School of Physical and Chemical Sciences(坎特伯雷大学物理与化学科学学院)
Mass Production of 2023 KMTNet Microlensing Planets. III: Three Planets from the Subprime Field
Westlake University(西湖大学);Tsinghua University(清华大学);Korea Astronomy and Space Science Institute(韩国天文学与空间科学研究所);Astronomical Observatory, University of Warsaw(华沙大学天文台);Department of Earth and Space Science, Graduate School of Science, Osaka University(大阪大学理学研究科地球惑星科学专攻);Westlake Institute for Advanced Study(西湖高等研究院);University of Canterbury, School of Physical and Chemical Sciences(坎特伯雷大学物理与化学科学学院)
KMT-2025-BLG-1616Lb: First Microlensing Bound Planet From DREAMS
Westlake Institute for Advanced Study(西湖高等研究院);Westlake University(西湖大学);Korea Astronomy and Space Science Institute(韩国天文与空间科学研究所);The University of Osaka(大阪大学);Tsinghua University(清华大学);Chungbuk National University(忠北国立大学)
Four Cold Super-Jupiters Revealed by Extended and Complex Microlensing Signals
Chungbuk National University(忠北国立大学);Korea Astronomy and Space Science Institute(韩国天文与空间科学研究所);University of Canterbury(坎特伯雷大学);Ohio State University(俄亥俄州立大学);University of Science and Technology(科学技术联合大学院大学);Weizmann Institute of Science(魏茨曼科学研究所)
KMT-2026-BLG-0083L: A Two-Jovian-Planet System Orbiting an M Dwarf Discovered by Microlensing
KMTNet Collaboration(KMTNet合作组织);Chungbuk National University(忠北国立大学);Korea Astronomy and Space Science Institute(韩国天文学与空间科学研究所);DREAMS Collaboration(DREAMS合作组织);Westlake University(西湖大学);Hangzhou 310030, Zhejiang Province, China(中国浙江省杭州市310030);OGLE Collaboration(OGLE合作组织);Astronomical Observatory, University of Warsaw(华沙大学天文台);PRIME Collaboration(PRIME合作组织);Massey University(梅西大学);Cerro Tololo Inter-American Observato(塞罗托洛洛美洲际观测站)
Three Saturn-mass Microlensing Planets Identified through Signals from Peripheral-caustic Perturbations
Chungbuk National University(忠北国立大学);Korea Astronomy and Space Science Institute(韩国天文学与空间科学研究所);Astronomical Observatory, University of Warsaw(华沙大学天文台);Massey University(梅西大学);University of Canterbury(坎特伯雷大学);Ohio State University(俄亥俄州立大学);University of Science and Technology(科学技术大学)
OGLE-2016-BLG-0523: A Low-mass Brown Dwarf or super-Jupiter in a $>100$ au Orbit
Westlake University(西湖大学);Korea Astronomy and Space Science Institute(韩国天文学与空间科学研究所);Astronomical Observatory, University of Warsaw(华沙大学天文台);University of Canterbury(坎特伯雷大学);Max-Planck-Institute for Astronomy(马克斯·普朗克天体物理学研究所);Department of Astronomy, Ohio State University(俄亥俄州立大学天文学系);Department of Physics, Chungbuk National University(忠北国立大学物理系);National University of Science and Technology (UST)(韩国科学技术院)