The Astronomical Journal (Jan 2025)
Systematic Reanalysis of KMTNet Microlensing Events. II. Two New Planets in Giant-source Events
- Hongjing Yang,
- Jennifer C. Yee,
- Jiyuan Zhang,
- Chung-Uk Lee,
- Dong-Jin Kim,
- Ian A. Bond,
- Andrzej Udalski,
- Kyu-Ha Hwang,
- Weicheng Zang,
- Qiyue Qian,
- Andrew Gould,
- Shude Mao,
- (Leading Authors),
- Michael D. Albrow,
- Sun-Ju Chung,
- Cheongho Han,
- Youn Kil Jung,
- Yoon-Hyun Ryu,
- In-Gu Shin,
- Yossi Shvartzvald,
- Sang-Mok Cha,
- Hyoun-Woo Kim,
- Seung-Lee Kim,
- Dong-Joo Lee,
- Yongseok Lee,
- Byeong-Gon Park,
- Richard W. Pogge,
- (The KMTNet Collaboration),
- Fumio Abe,
- Ken Bando,
- David P. Bennett,
- Aparna Bhattacharya,
- Akihiko Fukui,
- Ryusei Hamada,
- Shunya Hamada,
- Naoto Hamasaki,
- Yuki Hirao,
- Stela Ishitani Silva,
- Yoshitaka Itow,
- Naoki Koshimoto,
- Yutaka Matsubara,
- Shota Miyazaki,
- Yasushi Muraki,
- Tutumi Nagai,
- Kansuke Nunota,
- Greg Olmschenk,
- Clément Ranc,
- Nicholas J. Rattenbury,
- Yuki Satoh,
- Takahiro Sumi,
- Daisuke Suzuki,
- Sean K. Terry,
- Paul . J. Tristram,
- Aikaterini Vandorou,
- Hibiki Yama,
- (The MOA Collaboration),
- Przemek Mróz,
- Jan Skowron,
- Radoslaw Poleski,
- Michał K. Szymański,
- Igor Soszyński,
- Paweł Pietrukowicz,
- Szymon Kozłowski,
- Krzysztof Ulaczyk,
- Krzysztof A. Rybicki,
- Patryk Iwanek,
- Marcin Wrona,
- (The OGLE Collaboration)
Affiliations
- Hongjing Yang
- ORCiD
- Department of Astronomy, School of Science, Westlake University , Hangzhou, Zhejiang 310030, People’s Republic of China ; [email protected], [email protected]; Department of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of China
- Jennifer C. Yee
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Jiyuan Zhang
- ORCiD
- Department of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of China
- Chung-Uk Lee
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Dong-Jin Kim
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Ian A. Bond
- Institute of Natural and Mathematical Sciences, Massey University , Auckland 0745, New Zealand
- Andrzej Udalski
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Kyu-Ha Hwang
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Weicheng Zang
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Qiyue Qian
- ORCiD
- Department of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of China
- Andrew Gould
- Max-Planck-Institute for Astronomy , Königstuhl 17, 69117 Heidelberg, Germany; Department of Astronomy, Ohio State University , 140 W. 18th Avenue, Columbus, OH 43210, USA
- Shude Mao
- ORCiD
- Department of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of China
- (Leading Authors)
- Michael D. Albrow
- ORCiD
- University of Canterbury , School of Physical and Chemical Sciences, Private Bag 4800, Christchurch 8020, New Zealand
- Sun-Ju Chung
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Cheongho Han
- ORCiD
- Department of Physics, Chungbuk National University , Cheongju 28644, Republic of Korea
- Youn Kil Jung
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea; National University of Science and Technology (UST) , Daejeon 34113, Republic of Korea
- Yoon-Hyun Ryu
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- In-Gu Shin
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Yossi Shvartzvald
- ORCiD
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 7610001, Israel
- Sang-Mok Cha
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea; School of Space Research, Kyung Hee University , Yongin, Kyeonggi 17104, Republic of Korea
- Hyoun-Woo Kim
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Seung-Lee Kim
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Dong-Joo Lee
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Yongseok Lee
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea; School of Space Research, Kyung Hee University , Yongin, Kyeonggi 17104, Republic of Korea
- Byeong-Gon Park
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Richard W. Pogge
- ORCiD
- Department of Astronomy, Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA
- (The KMTNet Collaboration)
- Fumio Abe
- Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Ken Bando
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- David P. Bennett
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Aparna Bhattacharya
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Akihiko Fukui
- ORCiD
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Instituto de Astrofísica de Canarias , Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain
- Ryusei Hamada
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Shunya Hamada
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Naoto Hamasaki
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Yuki Hirao
- Institute of Astronomy, Graduate School of Science, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
- Stela Ishitani Silva
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Physics, The Catholic University of America , WA, DC 20064, USA
- Yoshitaka Itow
- Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Naoki Koshimoto
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Yutaka Matsubara
- Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Shota Miyazaki
- Institute of Space and Astronautical Science , Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan
- Yasushi Muraki
- Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Tutumi Nagai
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Kansuke Nunota
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Greg Olmschenk
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
- Clément Ranc
- Sorbonne Université , CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, 75014 Paris, France
- Nicholas J. Rattenbury
- Department of Physics, University of Auckland , Private Bag 92019, Auckland, New Zealand
- Yuki Satoh
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Takahiro Sumi
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Daisuke Suzuki
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- Sean K. Terry
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Paul . J. Tristram
- University of Canterbury Mt. John Observatory , P.O. Box 56, Lake Tekapo 8770, New Zealand
- Aikaterini Vandorou
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Hibiki Yama
- Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
- (The MOA Collaboration)
- Przemek Mróz
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Jan Skowron
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Radoslaw Poleski
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Michał K. Szymański
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Igor Soszyński
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Paweł Pietrukowicz
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Szymon Kozłowski
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Krzysztof Ulaczyk
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV 4 7AL, UK
- Krzysztof A. Rybicki
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Patryk Iwanek
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Marcin Wrona
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- (The OGLE Collaboration)
- DOI
- https://doi.org/10.3847/1538-3881/adc73e
- Journal volume & issue
-
Vol. 169,
no. 6
p. 295
Abstract
In this work, we continue to apply the updated KMTNet tender-love care photometric pipeline to historical microlensing events. We apply the pipeline to a subsample of events from the KMTNet database, which we refer to as the giant source sample. Leveraging the improved photometric data, we conduct a systematic search for anomalies within this sample. The search successfully uncovers four new planet-like anomalies and recovers two previously known planetary signals. After detailed analysis, two of the newly discovered anomalies are confirmed as clear planets: KMT-2019-BLG-0578 and KMT-2021-BLG-0736. Their planet-to-host mass ratios are q ∼ 4 × 10 ^−3 and q ∼ 1 × 10 ^−4 , respectively. Another event, OGLE-2018-BLG-0421 (KMT-2018-BLG-0831), remains ambiguous. Both a stellar companion and a giant planet in the lens system could potentially explain the observed anomaly. The anomaly signal of the last event, MOA-2022-BLG-038 (KMT-2022-BLG-2342), is attributed to an extra source star. Within this sample, our procedure doubles the number of confirmed planets, demonstrating a significant enhancement in the survey sensitivity.
Keywords
- Exoplanets
- Photometry
- Light curves
- Gravitational microlensing
- Gravitational microlensing exoplanet detection
