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MOA-2019-BLG-008Lb: a new microlensing detection of an object at the planet/brown dwarf boundary

We report on the observations, analysis and interpretation of the microlensing event MOA-2019-BLG-008. The observed anomaly in the photometric light curve is best described through a binary lens model. In this model, the source did not cross caustics and no finite-source effects were observed. There...

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Hauptverfasser: Bachelet, Etienne (VerfasserIn) , Tsapras, Yiannis (VerfasserIn) , Gould, Andrew (VerfasserIn) , Street, R. A. (VerfasserIn) , Bennett, David P. (VerfasserIn) , Hundertmark, Markus (VerfasserIn) , Bozza, V. (VerfasserIn) , Bramich, D. M. (VerfasserIn) , Cassan, A. (VerfasserIn) , Dominik, M. (VerfasserIn) , Horne, K. (VerfasserIn) , Mao, S. (VerfasserIn) , Saha, A. (VerfasserIn) , Wambsganß, Joachim (VerfasserIn) , Zang, Weicheng (VerfasserIn) , Abe, Fumio (VerfasserIn) , Barry, Richard (VerfasserIn) , Bhattacharya, Aparna (VerfasserIn) , Bond, Ian A. (VerfasserIn) , Fukui, Akihiko (VerfasserIn) , Fujii, Hirosane (VerfasserIn) , Hirao, Yuki (VerfasserIn) , Itow, Yoshitaka (VerfasserIn) , Kirikawa, Rintaro (VerfasserIn) , Kondo, Iona (VerfasserIn) , Koshimoto, Naoki (VerfasserIn) , Matsubara, Yutaka (VerfasserIn) , Matsumoto, Sho (VerfasserIn) , Miyazaki, Shota (VerfasserIn) , Muraki, Yasushi (VerfasserIn) , Olmschenk, Greg (VerfasserIn) , Ranc, Clément (VerfasserIn) , Okamura, Arisa (VerfasserIn) , Rattenbury, Nicholas J. (VerfasserIn) , Satoh, Yuki K. (VerfasserIn) , Sumi, Takahiro (VerfasserIn) , Suzuki, Daisuke (VerfasserIn) , Silva, Stela Ishitani (VerfasserIn) , Toda, Taiga (VerfasserIn) , Tristram, Paul J. (VerfasserIn) , Vandorou, Aikaterini (VerfasserIn) , Yama, Hibiki (VerfasserIn) , Albrow, Michael D. (VerfasserIn) , Chung, Sun-Ju (VerfasserIn) , Han, Cheongho (VerfasserIn) , Hwang, Kyu-Ha (VerfasserIn) , Jung, Youn Kil (VerfasserIn) , Ryu, Yoon-Hyun (VerfasserIn) , Shin, In-Gu (VerfasserIn) , Shvartzvald, Yossi (VerfasserIn) , Yee, Jennifer C. (VerfasserIn) , Cha, Sang-Mok (VerfasserIn) , Kim, Dong-Jin (VerfasserIn) , Kim, Seung-Lee (VerfasserIn) , Lee, Chung-Uk (VerfasserIn) , Lee, Dong-Joo (VerfasserIn) , Lee, Yongseok (VerfasserIn) , Park, Byeong-Gon (VerfasserIn) , Pogge, Richard W. (VerfasserIn) , Udalski, Andrzej (VerfasserIn) , Mróz, Przemek (VerfasserIn) , Poleski, Radosław (VerfasserIn) , Skowron, Jan (VerfasserIn) , Szymański, Michał K. (VerfasserIn) , Soszyński, Igor (VerfasserIn) , Pietrukowicz, Paweł (VerfasserIn) , Kozłowski, Szymon (VerfasserIn) , Ulaczyk, Krzysztof (VerfasserIn) , Rybicki, Krzysztof A. (VerfasserIn) , Iwanek, Patryk (VerfasserIn) , Wrona, Marcin (VerfasserIn) , Gromadzki, Mariusz (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2022 August 2
In: The astronomical journal
Year: 2022, Jahrgang: 164, Heft: 3, Pages: 1-16
ISSN:1538-3881
DOI:10.3847/1538-3881/ac78ed
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/ac78ed
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.3847/1538-3881/ac78ed
Volltext
Verfasserangaben:E. Bachelet, Y. Tsapras, Andrew Gould, R.A. Street, David P. Bennett, M.P.G. Hundertmark, V. Bozza, D.M. Bramich, A. Cassan, M. Dominik, K. Horne, S. Mao, A. Saha, J. Wambsganss, Weicheng Zang, (The ROME/REA Collaboration), Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Ian A. Bond, Akihiko Fukui, Hirosane Fujii, Yuki Hirao, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Yasushi Muraki, Greg Olmschenk, Clément Ranc, Arisa Okamura, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Stela Ishitani Silva, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama (The MOA Collaboration), Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, 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), and Andrzej Udalski, Przemek Mróz, Radosław Poleski, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, and Mariusz Gromadzki (The OGLE Collaboration)

MARC

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520 |a We report on the observations, analysis and interpretation of the microlensing event MOA-2019-BLG-008. The observed anomaly in the photometric light curve is best described through a binary lens model. In this model, the source did not cross caustics and no finite-source effects were observed. Therefore, the angular Einstein ring radius θ E cannot be measured from the light curve alone. However, the large event duration, t E ∼ 80 days, allows a precise measurement of the microlensing parallax π E. In addition to the constraints on the angular radius θ * and the apparent brightness I s of the source, we employ the Besançon and GalMod galactic models to estimate the physical properties of the lens. We find excellent agreement between the predictions of the two galactic models: the companion is likely a resident of the brown dwarf desert with a mass M p ∼ 30 M Jup, and the host is a main-sequence dwarf star. The lens lies along the line of sight to the Galactic bulge, at a distance of ≤4 kpc. We estimate that in about 10 yr the lens and source will be separated by ∼55 mas, and it will be possible to confirm the exact nature of the lensing system by using high-resolution imaging from ground- or space-based observatories. 
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A.","given":"Krzysztof A.","role":"aut"},{"family":"Iwanek","role":"aut","display":"Iwanek, Patryk","given":"Patryk"},{"family":"Wrona","display":"Wrona, Marcin","given":"Marcin","role":"aut"},{"family":"Gromadzki","display":"Gromadzki, Mariusz","given":"Mariusz","role":"aut"}],"title":[{"subtitle":"a new microlensing detection of an object at the planet/brown dwarf boundary","title_sort":"MOA-2019-BLG-008Lb","title":"MOA-2019-BLG-008Lb"}],"language":["eng"],"name":{"displayForm":["E. Bachelet, Y. Tsapras, Andrew Gould, R.A. Street, David P. Bennett, M.P.G. Hundertmark, V. Bozza, D.M. Bramich, A. Cassan, M. Dominik, K. Horne, S. Mao, A. Saha, J. Wambsganss, Weicheng Zang, (The ROME/REA Collaboration), Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Ian A. Bond, Akihiko Fukui, Hirosane Fujii, Yuki Hirao, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Yasushi Muraki, Greg Olmschenk, Clément Ranc, Arisa Okamura, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Stela Ishitani Silva, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama (The MOA Collaboration), Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, 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), and Andrzej Udalski, Przemek Mróz, Radosław Poleski, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, and Mariusz Gromadzki (The OGLE Collaboration)"]},"type":{"bibl":"article-journal","media":"Online-Ressource"}} 
SRT |a BACHELETETMOA2019BLG2022 

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