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Status: Bibliographieeintrag

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Verfasst von:Han, Cheongho [VerfasserIn]   i
 Gould, Andrew [VerfasserIn]   i
 Bond, Ian A. [VerfasserIn]   i
 Jung, Youn Kil [VerfasserIn]   i
 Albrow, Michael D. [VerfasserIn]   i
 Chung, Sun-Ju [VerfasserIn]   i
 Hwang, Kyu-Ha [VerfasserIn]   i
 Ryu, Yoon-Hyun [VerfasserIn]   i
 Shin, In-Gu [VerfasserIn]   i
 Shvartzvald, Yossi [VerfasserIn]   i
 Yee, Jennifer C. [VerfasserIn]   i
 Zang, Weicheng [VerfasserIn]   i
 Cha, Sang-Mok [VerfasserIn]   i
 Kim, Dong-Jin [VerfasserIn]   i
 Kim, Seung-Lee [VerfasserIn]   i
 Lee, Chung-Uk [VerfasserIn]   i
 Lee, Dong-Joo [VerfasserIn]   i
 Lee, Yongseok [VerfasserIn]   i
 Park, Byeong-Gon [VerfasserIn]   i
 Pogge, Richard W. [VerfasserIn]   i
 Kim, Doeon [VerfasserIn]   i
 Abe, Fumio [VerfasserIn]   i
 Barry, Richard K. [VerfasserIn]   i
 Bennett, David P. [VerfasserIn]   i
 Bhattacharya, Aparna [VerfasserIn]   i
 Fujii, Hirosane [VerfasserIn]   i
 Fukui, Akihiko [VerfasserIn]   i
 Hirao, Yuki [VerfasserIn]   i
 Itow, Yoshitaka [VerfasserIn]   i
 Kirikawa, Rintaro [VerfasserIn]   i
 Koshimoto, Naoki [VerfasserIn]   i
 Kondo, Iona [VerfasserIn]   i
 Matsubara, Yutaka [VerfasserIn]   i
 Matsumoto, Sho [VerfasserIn]   i
 Miyazaki, Shota [VerfasserIn]   i
 Muraki, Yasushi [VerfasserIn]   i
 Olmschenk, Greg [VerfasserIn]   i
 Okamura, Arisa [VerfasserIn]   i
 Ranc, Clément [VerfasserIn]   i
 Rattenbury, Nicholas J. [VerfasserIn]   i
 Satoh, Yuki K. [VerfasserIn]   i
 Silva, Stela Ishitani [VerfasserIn]   i
 Sumi, Takahiro [VerfasserIn]   i
 Suzuki, Daisuke [VerfasserIn]   i
 Toda, Taiga [VerfasserIn]   i
 Tristram, Paul J. [VerfasserIn]   i
 Vandorou, Aikaterini [VerfasserIn]   i
 Yama, Hibiki [VerfasserIn]   i
Titel:KMT-2021-BLG-1077L
Titelzusatz:the fifth confirmed multiplanetary system detected by microlensing
Verf.angabe:Cheongho Han, Andrew Gould, Ian A. Bond, Youn Kil Jung, Michael D. Albrow, Sun-Ju Chung, Kyu-Ha Hwang, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, 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, Doeon Kim (the KMTNet collaboration); Fumio Abe, Richard K. Barry, David P. Bennett, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Yoshitaka Itow, Rintaro Kirikawa, Naoki Koshimoto, Iona Kondo, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Yasushi Muraki, Greg Olmschenk, Arisa Okamura, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Stela Ishitani Silva, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, and Hibiki Yama (the MOA collaboration)
E-Jahr:2022
Jahr:20 June 2022
Umfang:9 S.
Fussnoten:Gesehen am 17.08.2022
Titel Quelle:Enthalten in: Astronomy and astrophysics
Ort Quelle:Les Ulis : EDP Sciences, 1969
Jahr Quelle:2022
Band/Heft Quelle:662(2022), Artikel-ID A70, Seite 1-9
ISSN Quelle:1432-0746
Abstract:The high-magnification microlensing event KMT-2021-BLG-1077 exhibits a subtle and complex anomaly pattern in the region around the peak. We analyze the lensing light curve of the event with the aim of revealing the nature of the anomaly. Methods. We test various models in combination with several interpretations: that the lens is a binary (2L1S), the source is a binary (1L2S), both the lens and source are binaries (2L2S), or the lens is a triple system (3L1S). We search for the best-fit models under the individual interpretations of the lens and source systems.<i>Results.<i/> We find that the anomaly cannot be explained by the usual three-body (2L1S and 1L2S) models. The 2L2S model improves the fit compared to the three-body models, but it still leaves noticeable residuals. On the other hand, the 3L1S interpretation yields a model explaining all the major anomalous features in the lensing light curve. According to the 3L1S interpretation, the estimated mass ratios of the lens companions to the primary are ~1.56 × 10<sup>−3<sup/> and ~1.75 × 10<sup>−3<sup/>, which correspond to ~1.6 and ~1.8 times the Jupiter/Sun mass ratio, respectively, and therefore the lens is a multiplanetary system containing two giant planets. With the constraints of the event time-scale and angular Einstein radius, it is found that the host of the lens system is a low-mass star of mid-to-late M spectral type with amass of , and it hosts two gas giant planets with masses of <i>M<i/><sub>J<sub/> and . The planets lie beyond the snow line of the host with projected separations of AU and AU. The planetary system resides in the Galactic bulge at a distance of kpc. The lens of the event is the fifth confirmed multiplanetary system detected by microlensing following OGLE-2006-BLG-109L, OGLE-2012-BLG-0026L, OGLE-2018-BLG-1011L, and OGLE-2019-BLG-0468L.
DOI:doi:10.1051/0004-6361/202243550
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1051/0004-6361/202243550
 Volltext: https://www.aanda.org/articles/aa/abs/2022/06/aa43550-22/aa43550-22.html
 DOI: https://doi.org/10.1051/0004-6361/202243550
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1809686156
Verknüpfungen:→ Zeitschrift

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