KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event
We present the analysis of a microlensing event KMT-2022-BLG-0086 of which the overall light curve is not described by a binary-lens single-source (2L1S) model, which suggests the existence of an extra lens or an extra source. We found that the event is best explained by the binary-lens binary-sourc...
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2025-01-01
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| author | Sun-Ju Chung Kyu-Ha Hwang Jennifer C. Yee Andrew Gould Ian A. Bond Hongjing Yang (Leading Authors) Michael D. Albrow Youn Kil Jung Cheongho Han Yoon-Hyun Ryu In-Gu Shin Yossi Shvartzvald Weicheng Zang Sang-Mok Cha Dong-Jin Kim Seung-Lee Kim Chung-Uk Lee Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge (The KMTNet Collaboration) Fumio Abe David P. Bennett Aparna Bhattacharya Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Naoki Koshimoto 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) |
| author_facet | Sun-Ju Chung Kyu-Ha Hwang Jennifer C. Yee Andrew Gould Ian A. Bond Hongjing Yang (Leading Authors) Michael D. Albrow Youn Kil Jung Cheongho Han Yoon-Hyun Ryu In-Gu Shin Yossi Shvartzvald Weicheng Zang Sang-Mok Cha Dong-Jin Kim Seung-Lee Kim Chung-Uk Lee Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge (The KMTNet Collaboration) Fumio Abe David P. Bennett Aparna Bhattacharya Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Naoki Koshimoto 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) |
| author_sort | Sun-Ju Chung |
| collection | DOAJ |
| description | We present the analysis of a microlensing event KMT-2022-BLG-0086 of which the overall light curve is not described by a binary-lens single-source (2L1S) model, which suggests the existence of an extra lens or an extra source. We found that the event is best explained by the binary-lens binary-source (2L2S) model, but the 2L2S model is only favored over the triple-lens single-source (3L1S) model by Δ χ ^2 ≃ 9. Although the event has noticeable anomalies around the peak of the light curve, they are not enough covered to constrain the angular Einstein radius θ _E , thus we only measure the minimum angular Einstein radius ${\theta }_{{\rm{E}},{\rm{\min }}}$ . From the Bayesian analysis, it is found that that the binary lens system is a binary star with masses of $({m}_{1},{m}_{2})=(0.4{6}_{-0.25}^{+0.35}\,{M}_{\odot },0.7{5}_{-0.55}^{+0.67}\,{M}_{\odot })$ at a distance of ${D}_{{\rm{L}}}=5.8{7}_{-1.79}^{+1.21}$ kpc, while the triple lens system is a brown dwarf or a massive giant planet in a low-mass binary-star system with masses of $({m}_{1},{m}_{2},{m}_{3})=(0.4{3}_{-0.35}^{+0.41}\,{M}_{\odot },0.05{6}_{-0.047}^{+0.055}\,{M}_{\odot }$ , $20.8{4}_{-17.04}^{+20.20}\,{M}_{{\rm{J}}})$ at a distance of ${D}_{{\rm{L}}}=4.0{6}_{-3.28}^{+1.39}$ kpc, indicating a disk lens system. The 2L2S model yields the relative lens-source proper motion of μ _rel ≥ 4.6 mas yr ^−1 that is consistent with the Bayesian result, whereas the 3L1S model yields μ _rel ≥ 18.9 mas yr ^−1 , which is more than three times larger than that of a typical disk object of ∼6 mas yr ^−1 and thus is not consistent with the Bayesian result. This suggests that the event is likely caused by the binary-lens binary-source model. |
| format | Article |
| id | doaj-art-9cbd282023414aecbacef52483a00a96 |
| institution | DOAJ |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astronomical Journal |
| spelling | doaj-art-9cbd282023414aecbacef52483a00a962025-08-20T02:41:33ZengIOP PublishingThe Astronomical Journal1538-38812025-01-0117027510.3847/1538-3881/ade2e7KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing EventSun-Ju Chung0https://orcid.org/0000-0001-6285-4528Kyu-Ha Hwang1https://orcid.org/0000-0002-9241-4117Jennifer C. Yee2https://orcid.org/0000-0001-9481-7123Andrew Gould3Ian A. Bond4Hongjing Yang5https://orcid.org/0000-0003-0626-8465(Leading Authors)Michael D. Albrow6https://orcid.org/0000-0003-3316-4012Youn Kil Jung7https://orcid.org/0000-0002-0314-6000Cheongho Han8https://orcid.org/0000-0002-2641-9964Yoon-Hyun Ryu9https://orcid.org/0000-0001-9823-2907In-Gu Shin10https://orcid.org/0000-0002-4355-9838Yossi Shvartzvald11https://orcid.org/0000-0003-1525-5041Weicheng Zang12https://orcid.org/0000-0001-6000-3463Sang-Mok Cha13Dong-Jin Kim14https://orcid.org/0000-0002-4292-9649Seung-Lee Kim15https://orcid.org/0000-0003-0562-5643Chung-Uk Lee16https://orcid.org/0000-0003-0043-3925Dong-Joo Lee17Yongseok Lee18Byeong-Gon Park19https://orcid.org/0000-0002-6982-7722Richard W. Pogge20https://orcid.org/0000-0003-1435-3053(The KMTNet Collaboration)Fumio Abe21David P. Bennett22https://orcid.org/0000-0001-8043-8413Aparna Bhattacharya23Akihiko Fukui24https://orcid.org/0000-0002-4909-5763Ryusei Hamada25Yuki Hirao26https://orcid.org/0000-0003-4776-8618Stela Ishitani Silva27https://orcid.org/0000-0003-2267-1246Naoki Koshimoto28https://orcid.org/0000-0003-2302-9562Shota Miyazaki29https://orcid.org/0000-0001-9818-1513Yasushi Muraki30https://orcid.org/0000-0003-1978-2092Tutumi Nagai31Kansuke Nunota32https://orcid.org/0009-0005-3414-455XGreg Olmschenk33https://orcid.org/0000-0001-8472-2219Clément Ranc34https://orcid.org/0000-0003-2388-4534Nicholas J. Rattenbury35https://orcid.org/0000-0001-5069-319XYuki Satoh36https://orcid.org/0000-0002-1228-4122Takahiro Sumi37https://orcid.org/0000-0002-4035-5012Daisuke Suzuki38https://orcid.org/0000-0002-5843-9433Sean K. Terry39https://orcid.org/0000-0002-5029-3257Paul J. Tristram40Aikaterini Vandorou41https://orcid.org/0000-0002-9881-4760Hibiki Yama42(The MOA Collaboration)Korea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USADepartment of Astronomy, Ohio State University , 140 W. 18th Avenue, Columbus, OH 43210, USA; Max-Planck-Institute for Astronomy , Königstuhl 17, D-69117 Heidelberg, GermanyInstitute of Natural and Mathematical Science, Massey University , Auckland 0745, New ZealandDepartment of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University , Beijing 100084, People’s Republic of ChinaDepartment of Physics and Astronomy, University of Canterbury , Private Bag, 4800 Christchurch, New ZealandKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.kr; University of Science and Technology, Korea, (UST) , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaDepartment of Physics, Chungbuk National University , Cheongju 361-763, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USADepartment of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 76100, IsraelCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USAKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.kr; School of Space Research, Kyung Hee University , Giheung-gu, Yongin, Gyeonggi-do, 17104, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.krKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.kr; School of Space Research, Kyung Hee University , Giheung-gu, Yongin, Gyeonggi-do, 17104, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-Gu, Daejeon 34055, Republic of Korea ; sjchung@kasi.re.kr; University of Science and Technology, Korea, (UST) , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaDepartment of Astronomy, Ohio State University , 140 W. 18th Avenue, Columbus, OH 43210, USAInstitute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, JapanCode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USACode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USADepartment 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, 38205 La Laguna, Tenerife, SpainDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanInstitute of Astronomy, Graduate School of Science, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, JapanCode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Physics, The Catholic University of America , Washington, DC 20064, USADepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanInstitute of Space and Astronautical Science , Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, JapanInstitute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanCode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USASorbonne Université , CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, 75014 Paris, FranceDepartment of Physics, University of Auckland , Private Bag 92019, Auckland, New ZealandDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanCode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USAUniversity of Canterbury Mt. John Observatory , P.O. Box 56, Lake Tekapo 8770, New ZealandCode 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USADepartment of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, JapanWe present the analysis of a microlensing event KMT-2022-BLG-0086 of which the overall light curve is not described by a binary-lens single-source (2L1S) model, which suggests the existence of an extra lens or an extra source. We found that the event is best explained by the binary-lens binary-source (2L2S) model, but the 2L2S model is only favored over the triple-lens single-source (3L1S) model by Δ χ ^2 ≃ 9. Although the event has noticeable anomalies around the peak of the light curve, they are not enough covered to constrain the angular Einstein radius θ _E , thus we only measure the minimum angular Einstein radius ${\theta }_{{\rm{E}},{\rm{\min }}}$ . From the Bayesian analysis, it is found that that the binary lens system is a binary star with masses of $({m}_{1},{m}_{2})=(0.4{6}_{-0.25}^{+0.35}\,{M}_{\odot },0.7{5}_{-0.55}^{+0.67}\,{M}_{\odot })$ at a distance of ${D}_{{\rm{L}}}=5.8{7}_{-1.79}^{+1.21}$ kpc, while the triple lens system is a brown dwarf or a massive giant planet in a low-mass binary-star system with masses of $({m}_{1},{m}_{2},{m}_{3})=(0.4{3}_{-0.35}^{+0.41}\,{M}_{\odot },0.05{6}_{-0.047}^{+0.055}\,{M}_{\odot }$ , $20.8{4}_{-17.04}^{+20.20}\,{M}_{{\rm{J}}})$ at a distance of ${D}_{{\rm{L}}}=4.0{6}_{-3.28}^{+1.39}$ kpc, indicating a disk lens system. The 2L2S model yields the relative lens-source proper motion of μ _rel ≥ 4.6 mas yr ^−1 that is consistent with the Bayesian result, whereas the 3L1S model yields μ _rel ≥ 18.9 mas yr ^−1 , which is more than three times larger than that of a typical disk object of ∼6 mas yr ^−1 and thus is not consistent with the Bayesian result. This suggests that the event is likely caused by the binary-lens binary-source model.https://doi.org/10.3847/1538-3881/ade2e7Gravitational microlensing |
| spellingShingle | Sun-Ju Chung Kyu-Ha Hwang Jennifer C. Yee Andrew Gould Ian A. Bond Hongjing Yang (Leading Authors) Michael D. Albrow Youn Kil Jung Cheongho Han Yoon-Hyun Ryu In-Gu Shin Yossi Shvartzvald Weicheng Zang Sang-Mok Cha Dong-Jin Kim Seung-Lee Kim Chung-Uk Lee Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge (The KMTNet Collaboration) Fumio Abe David P. Bennett Aparna Bhattacharya Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Naoki Koshimoto 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) KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event The Astronomical Journal Gravitational microlensing |
| title | KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event |
| title_full | KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event |
| title_fullStr | KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event |
| title_full_unstemmed | KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event |
| title_short | KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event |
| title_sort | kmt 2022 blg 0086 another binary lens binary source microlensing event |
| topic | Gravitational microlensing |
| url | https://doi.org/10.3847/1538-3881/ade2e7 |
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