Cheongho Han, Ian A. Bond, Chung-Uk Lee, Andrew Gould, Michael D. Albrow, Sun-Ju Chung, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, Yossi Shvartzvald, In-Gu Shin, Jennifer C. Yee, Hongjing Yang, Weicheng Zang, Sang-Mok Cha, Doeon Kim, Dong-Jin Kim, Seung-Lee Kim, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Fumio Abe, Ken Bando, Richard Barry, David P. Bennett, Aparna Bhattacharya, Hirosame Fujii, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasaki, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, 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, Mio Tomoyoshi, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, Kansuke Yamashita, Etienne Bachelet, Paolo Rota, Valerio Bozza, Paweł Zielinski, Rachel A. Street, Yiannis Tsapras, Markus Hundertmark, Joachim Wambsganss, Łukasz Wyrzykowski, Roberto Figuera Jaimes, Arnaud Cassan, Martin Dominik, Krzysztof A. Rybicki, Markus Rabus
{"title":"通过小图像扰动产生的信号探测到四颗微透镜巨行星","authors":"Cheongho Han, Ian A. Bond, Chung-Uk Lee, Andrew Gould, Michael D. Albrow, Sun-Ju Chung, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, Yossi Shvartzvald, In-Gu Shin, Jennifer C. Yee, Hongjing Yang, Weicheng Zang, Sang-Mok Cha, Doeon Kim, Dong-Jin Kim, Seung-Lee Kim, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Fumio Abe, Ken Bando, Richard Barry, David P. Bennett, Aparna Bhattacharya, Hirosame Fujii, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasaki, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, 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, Mio Tomoyoshi, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, Kansuke Yamashita, Etienne Bachelet, Paolo Rota, Valerio Bozza, Paweł Zielinski, Rachel A. Street, Yiannis Tsapras, Markus Hundertmark, Joachim Wambsganss, Łukasz Wyrzykowski, Roberto Figuera Jaimes, Arnaud Cassan, Martin Dominik, Krzysztof A. Rybicki, Markus Rabus","doi":"10.1051/0004-6361/202450221","DOIUrl":null,"url":null,"abstract":"<i>Aims.<i/> We investigated the nature of the anomalies appearing in four microlensing events KMT-2020-BLG-0757, KMT-2022-BLG-0732, KMT-2022-BLG-1787, and KMT-2022-BLG-1852. The light curves of these events commonly exhibit initial bumps followed by subsequent troughs that extend across a substantial portion of the light curves.<i>Methods.<i/> We performed thorough modeling of the anomalies to elucidate their characteristics. Despite their prolonged durations, which differ from the usual brief anomalies observed in typical planetary events, our analysis revealed that each anomaly in these events originated from a planetary companion located within the Einstein ring of the primary star. It was found that the initial bump arouse when the source star crossed one of the planetary caustics, while the subsequent trough feature occurred as the source traversed the region of minor image perturbations lying between the pair of planetary caustics.<i>Results.<i/> The estimated masses of the host and planet, their mass ratios, and the distance to the discovered planetary systems are (<i>M<i/><sub>host<sub/>/<i>M<i/><sub>⊙<sub/>, <i>M<i/><sub>planet<sub/><i>/M<i/><sub>J<sub/>, <i>q<i/>/10<sup>−3<sup/>, <i>D<i/><sub>L<sub/>/kpc) = (0.58<sub>−0.30<sub/><sup>+0.33<sup/>, 10.71<sub>−5.61<sub/><sup>+6.17<sup/>, 17.61 ± 2.25, 6.67<sub>−1.30<sub/><sup>+0.93<sup/>) for KMT-2020-BLG-0757, (0.53<sub>−0.31<sub/><sup>+0.31<sup/>, 1.12<sub>−0.65<sub/><sup>+0.65<sup/>, 2.01 ± 0.07, 6.66<sub>−1.84<sub/><sup>+1.19<sup/>) for KMT-2022-BLG-0732, (0.42<sub>−0.23<sub/><sup>+0.32<sup/>, 6.64<sub>−3.64<sub/><sup>+4.98<sup/>, 15.07 ± 0.86, 7.55<sub>−1.30<sub/><sup>+0.89<sup/>) for KMT-2022-BLG-1787, and (0.32<sub>−0.19<sub/><sup>+0.34<sup/>, 4.98<sub>−2.94<sub/><sup>+5.42<sup/>, 8.74 ± 0.49, 6.27<sub>−1.15<sub/><sup>+0.90<sup/>) for KMT-2022-BLG-1852. These parameters indicate that all the planets are giants with masses exceeding the mass of Jupiter in our solar system and the hosts are low-mass stars with masses substantially less massive than the Sun.","PeriodicalId":8571,"journal":{"name":"Astronomy & Astrophysics","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Four microlensing giant planets detected through signals produced by minor-image perturbations\",\"authors\":\"Cheongho Han, Ian A. Bond, Chung-Uk Lee, Andrew Gould, Michael D. Albrow, Sun-Ju Chung, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, Yossi Shvartzvald, In-Gu Shin, Jennifer C. Yee, Hongjing Yang, Weicheng Zang, Sang-Mok Cha, Doeon Kim, Dong-Jin Kim, Seung-Lee Kim, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Fumio Abe, Ken Bando, Richard Barry, David P. Bennett, Aparna Bhattacharya, Hirosame Fujii, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasaki, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, 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, Mio Tomoyoshi, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, Kansuke Yamashita, Etienne Bachelet, Paolo Rota, Valerio Bozza, Paweł Zielinski, Rachel A. Street, Yiannis Tsapras, Markus Hundertmark, Joachim Wambsganss, Łukasz Wyrzykowski, Roberto Figuera Jaimes, Arnaud Cassan, Martin Dominik, Krzysztof A. Rybicki, Markus Rabus\",\"doi\":\"10.1051/0004-6361/202450221\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<i>Aims.<i/> We investigated the nature of the anomalies appearing in four microlensing events KMT-2020-BLG-0757, KMT-2022-BLG-0732, KMT-2022-BLG-1787, and KMT-2022-BLG-1852. The light curves of these events commonly exhibit initial bumps followed by subsequent troughs that extend across a substantial portion of the light curves.<i>Methods.<i/> We performed thorough modeling of the anomalies to elucidate their characteristics. Despite their prolonged durations, which differ from the usual brief anomalies observed in typical planetary events, our analysis revealed that each anomaly in these events originated from a planetary companion located within the Einstein ring of the primary star. It was found that the initial bump arouse when the source star crossed one of the planetary caustics, while the subsequent trough feature occurred as the source traversed the region of minor image perturbations lying between the pair of planetary caustics.<i>Results.<i/> The estimated masses of the host and planet, their mass ratios, and the distance to the discovered planetary systems are (<i>M<i/><sub>host<sub/>/<i>M<i/><sub>⊙<sub/>, <i>M<i/><sub>planet<sub/><i>/M<i/><sub>J<sub/>, <i>q<i/>/10<sup>−3<sup/>, <i>D<i/><sub>L<sub/>/kpc) = (0.58<sub>−0.30<sub/><sup>+0.33<sup/>, 10.71<sub>−5.61<sub/><sup>+6.17<sup/>, 17.61 ± 2.25, 6.67<sub>−1.30<sub/><sup>+0.93<sup/>) for KMT-2020-BLG-0757, (0.53<sub>−0.31<sub/><sup>+0.31<sup/>, 1.12<sub>−0.65<sub/><sup>+0.65<sup/>, 2.01 ± 0.07, 6.66<sub>−1.84<sub/><sup>+1.19<sup/>) for KMT-2022-BLG-0732, (0.42<sub>−0.23<sub/><sup>+0.32<sup/>, 6.64<sub>−3.64<sub/><sup>+4.98<sup/>, 15.07 ± 0.86, 7.55<sub>−1.30<sub/><sup>+0.89<sup/>) for KMT-2022-BLG-1787, and (0.32<sub>−0.19<sub/><sup>+0.34<sup/>, 4.98<sub>−2.94<sub/><sup>+5.42<sup/>, 8.74 ± 0.49, 6.27<sub>−1.15<sub/><sup>+0.90<sup/>) for KMT-2022-BLG-1852. These parameters indicate that all the planets are giants with masses exceeding the mass of Jupiter in our solar system and the hosts are low-mass stars with masses substantially less massive than the Sun.\",\"PeriodicalId\":8571,\"journal\":{\"name\":\"Astronomy & Astrophysics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2024-07-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Astronomy & Astrophysics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1051/0004-6361/202450221\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy & Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1051/0004-6361/202450221","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Four microlensing giant planets detected through signals produced by minor-image perturbations
Aims. We investigated the nature of the anomalies appearing in four microlensing events KMT-2020-BLG-0757, KMT-2022-BLG-0732, KMT-2022-BLG-1787, and KMT-2022-BLG-1852. The light curves of these events commonly exhibit initial bumps followed by subsequent troughs that extend across a substantial portion of the light curves.Methods. We performed thorough modeling of the anomalies to elucidate their characteristics. Despite their prolonged durations, which differ from the usual brief anomalies observed in typical planetary events, our analysis revealed that each anomaly in these events originated from a planetary companion located within the Einstein ring of the primary star. It was found that the initial bump arouse when the source star crossed one of the planetary caustics, while the subsequent trough feature occurred as the source traversed the region of minor image perturbations lying between the pair of planetary caustics.Results. The estimated masses of the host and planet, their mass ratios, and the distance to the discovered planetary systems are (Mhost/M⊙, Mplanet/MJ, q/10−3, DL/kpc) = (0.58−0.30+0.33, 10.71−5.61+6.17, 17.61 ± 2.25, 6.67−1.30+0.93) for KMT-2020-BLG-0757, (0.53−0.31+0.31, 1.12−0.65+0.65, 2.01 ± 0.07, 6.66−1.84+1.19) for KMT-2022-BLG-0732, (0.42−0.23+0.32, 6.64−3.64+4.98, 15.07 ± 0.86, 7.55−1.30+0.89) for KMT-2022-BLG-1787, and (0.32−0.19+0.34, 4.98−2.94+5.42, 8.74 ± 0.49, 6.27−1.15+0.90) for KMT-2022-BLG-1852. These parameters indicate that all the planets are giants with masses exceeding the mass of Jupiter in our solar system and the hosts are low-mass stars with masses substantially less massive than the Sun.
期刊介绍:
Astronomy & Astrophysics is an international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental) independently of the techniques used to obtain the results.