OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System

Cheongho Han; Chung Uk Lee; Andrzej Udalski; Andrew Gould; Ian A. Bond; Michael D. Albrow; Sun Ju Chung; Kyu Ha Hwang; Youn Kil Jung; Yoon Hyun Ryu; In Gu Shin; Yossi Shvartzvald; Jennifer C. Yee; Weicheng Zang; Sang Mok Cha; Dong Jin Kim; Hyoun Woo Kim; Seung Lee Kim; Dong Joo Lee; Yongseok Lee; Byeong Gon Park; Richard W. Pogge; M. James Jee; Doeon Kim; Przemek Mróz; Michał K. Szymański; Jan Skowron; Radek Poleski; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Krzysztof Ulaczyk; Krzysztof A. Rybicki; Patryk Iwanek; Marcin Wrona; Fumio Abe; Richard Barry; David P. Bennett; Aparna Bhattacharya; Martin Donachie; Hirosane Fujii; Akihiko Fukui; Yoshitaka Itow; Yuki Hirao; Yuhei Kamei; Iona Kondo; Naoki Koshimoto; Man Cheung Alex Li; Yutaka Matsubara; Yasushi Muraki; Shota Miyazaki; Masayuki Nagakane; Clément Ranc; Nicholas J. Rattenbury; Haruno Suematsu; Denis J. Sullivan; Takahiro Sumi; Daisuke Suzuki; Paul J. Tristram; Takeharu Yamakawa; Atsunori Yonehara

doi:10.3847/1538-3881/ab5db9

OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System

Cheongho Han, Chung Uk Lee, Andrzej Udalski, Andrew Gould, Ian A. Bond, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Youn Kil Jung, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Weicheng Zang, Sang Mok Cha, Dong Jin Kim, Hyoun Woo Kim, Seung Lee Kim, Dong Joo Lee, Yongseok LeeByeong Gon Park, Richard W. Pogge, M. James Jee, Doeon Kim, Przemek Mróz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Martin Donachie, Hirosane Fujii, Akihiko Fukui, Yoshitaka Itow, Yuki Hirao, Yuhei Kamei, Iona Kondo, Naoki Koshimoto, Man Cheung Alex Li, Yutaka Matsubara, Yasushi Muraki, Shota Miyazaki, Masayuki Nagakane, Clément Ranc, Nicholas J. Rattenbury, Haruno Suematsu, Denis J. Sullivan, Takahiro Sumi, Daisuke Suzuki, Paul J. Tristram, Takeharu Yamakawa, Atsunori Yonehara

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Abstract

We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens from the fact that the anomaly pattern can be decomposed into two parts produced by two binary-lens events, in which one binary pair has a mass ratio of ∼0.01 between the lens components and the other pair has a mass ratio of ∼0.3. We find two sets of degenerate solutions, in which one solution has a projected separation between the primary and its stellar companion less than the angular Einstein radius θ_E (close solution), while the other solution has a separation greater than θ_E (wide solution). From the Bayesian analysis with the constraints of the event timescale and angular Einstein radius, we find that the planet has a mass of 4.4_-2.0^+3.0M_J and the stellar binary components have masses of 0.42_-0.19^+0.29M_⊙ and 0.12_-0.05^+0.08M_⊙, respectively, and the distance to the lens is D_L=7.6_-0.9^+1.2kpc. The planet is a circumstellar planet according to the wide solution, while it is a circumbinary planet according to the close solution.

Original language	English
Article number	ab5db9
Journal	Astronomical Journal
Volume	159
Issue number	2
DOIs	https://doi.org/10.3847/1538-3881/ab5db9
Publication status	Published - 2020 Feb

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© 2020. The American Astronomical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/ab5db9

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Han, C., Lee, C. U., Udalski, A., Gould, A., Bond, I. A., Albrow, M. D., Chung, S. J., Hwang, K. H., Jung, Y. K., Ryu, Y. H., Shin, I. G., Shvartzvald, Y., Yee, J. C., Zang, W., Cha, S. M., Kim, D. J., Kim, H. W., Kim, S. L., Lee, D. J., ... Yonehara, A. (2020). OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System. Astronomical Journal, 159(2), Article ab5db9. https://doi.org/10.3847/1538-3881/ab5db9

@article{561c6575ce6a4835b14b1d1a228293f4,

title = "OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System",

abstract = "We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens from the fact that the anomaly pattern can be decomposed into two parts produced by two binary-lens events, in which one binary pair has a mass ratio of ∼0.01 between the lens components and the other pair has a mass ratio of ∼0.3. We find two sets of degenerate solutions, in which one solution has a projected separation between the primary and its stellar companion less than the angular Einstein radius θE (close solution), while the other solution has a separation greater than θE (wide solution). From the Bayesian analysis with the constraints of the event timescale and angular Einstein radius, we find that the planet has a mass of 4.4-2.0+3.0MJ and the stellar binary components have masses of 0.42-0.19+0.29M⊙ and 0.12-0.05+0.08M⊙, respectively, and the distance to the lens is DL=7.6-0.9+1.2kpc. The planet is a circumstellar planet according to the wide solution, while it is a circumbinary planet according to the close solution.",

author = "Cheongho Han and Lee, {Chung Uk} and Andrzej Udalski and Andrew Gould and Bond, {Ian A.} and Albrow, {Michael D.} and Chung, {Sun Ju} and Hwang, {Kyu Ha} and Jung, {Youn Kil} and Ryu, {Yoon Hyun} and Shin, {In Gu} and Yossi Shvartzvald and Yee, {Jennifer C.} and Weicheng Zang and Cha, {Sang Mok} and Kim, {Dong Jin} and Kim, {Hyoun Woo} and Kim, {Seung Lee} and Lee, {Dong Joo} and Yongseok Lee and Park, {Byeong Gon} and Pogge, {Richard W.} and Jee, {M. James} and Doeon Kim and Przemek Mr{\'o}z and Szyma{\'n}ski, {Micha{\l} K.} and Jan Skowron and Radek Poleski and Igor Soszy{\'n}ski and Pawe{\l} Pietrukowicz and Szymon Koz{\l}owski and Krzysztof Ulaczyk and Rybicki, {Krzysztof A.} and Patryk Iwanek and Marcin Wrona and Fumio Abe and Richard Barry and Bennett, {David P.} and Aparna Bhattacharya and Martin Donachie and Hirosane Fujii and Akihiko Fukui and Yoshitaka Itow and Yuki Hirao and Yuhei Kamei and Iona Kondo and Naoki Koshimoto and {Cheung Alex Li}, Man and Yutaka Matsubara and Yasushi Muraki and Shota Miyazaki and Masayuki Nagakane and Cl{\'e}ment Ranc and Rattenbury, {Nicholas J.} and Haruno Suematsu and Sullivan, {Denis J.} and Takahiro Sumi and Daisuke Suzuki and Tristram, {Paul J.} and Takeharu Yamakawa and Atsunori Yonehara",

year = "2020",

month = feb,

doi = "10.3847/1538-3881/ab5db9",

language = "English",

volume = "159",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Han, C, Lee, CU, Udalski, A, Gould, A, Bond, IA, Albrow, MD, Chung, SJ, Hwang, KH, Jung, YK, Ryu, YH, Shin, IG, Shvartzvald, Y, Yee, JC, Zang, W, Cha, SM, Kim, DJ, Kim, HW, Kim, SL, Lee, DJ, Lee, Y, Park, BG, Pogge, RW, Jee, MJ, Kim, D, Mróz, P, Szymański, MK, Skowron, J, Poleski, R, Soszyński, I, Pietrukowicz, P, Kozłowski, S, Ulaczyk, K, Rybicki, KA, Iwanek, P, Wrona, M, Abe, F, Barry, R, Bennett, DP, Bhattacharya, A, Donachie, M, Fujii, H, Fukui, A, Itow, Y, Hirao, Y, Kamei, Y, Kondo, I, Koshimoto, N, Cheung Alex Li, M, Matsubara, Y, Muraki, Y, Miyazaki, S, Nagakane, M, Ranc, C, Rattenbury, NJ, Suematsu, H, Sullivan, DJ, Sumi, T, Suzuki, D, Tristram, PJ, Yamakawa, T & Yonehara, A 2020, 'OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System', Astronomical Journal, vol. 159, no. 2, ab5db9. https://doi.org/10.3847/1538-3881/ab5db9

TY - JOUR

T1 - OGLE-2018-BLG-1700L

T2 - Microlensing Planet in Binary Stellar System

AU - Han, Cheongho

AU - Lee, Chung Uk

AU - Udalski, Andrzej

AU - Gould, Andrew

AU - Bond, Ian A.

AU - Albrow, Michael D.

AU - Chung, Sun Ju

AU - Hwang, Kyu Ha

AU - Jung, Youn Kil

AU - Ryu, Yoon Hyun

AU - Shin, In Gu

AU - Shvartzvald, Yossi

AU - Yee, Jennifer C.

AU - Zang, Weicheng

AU - Cha, Sang Mok

AU - Kim, Dong Jin

AU - Kim, Hyoun Woo

AU - Kim, Seung Lee

AU - Lee, Dong Joo

AU - Lee, Yongseok

AU - Park, Byeong Gon

AU - Pogge, Richard W.

AU - Jee, M. James

AU - Kim, Doeon

AU - Mróz, Przemek

AU - Szymański, Michał K.

AU - Skowron, Jan

AU - Poleski, Radek

AU - Soszyński, Igor

AU - Pietrukowicz, Paweł

AU - Kozłowski, Szymon

AU - Ulaczyk, Krzysztof

AU - Rybicki, Krzysztof A.

AU - Iwanek, Patryk

AU - Wrona, Marcin

AU - Abe, Fumio

AU - Barry, Richard

AU - Bennett, David P.

AU - Bhattacharya, Aparna

AU - Donachie, Martin

AU - Fujii, Hirosane

AU - Fukui, Akihiko

AU - Itow, Yoshitaka

AU - Hirao, Yuki

AU - Kamei, Yuhei

AU - Kondo, Iona

AU - Koshimoto, Naoki

AU - Cheung Alex Li, Man

AU - Matsubara, Yutaka

AU - Muraki, Yasushi

AU - Miyazaki, Shota

AU - Nagakane, Masayuki

AU - Ranc, Clément

AU - Rattenbury, Nicholas J.

AU - Suematsu, Haruno

AU - Sullivan, Denis J.

AU - Sumi, Takahiro

AU - Suzuki, Daisuke

AU - Tristram, Paul J.

AU - Yamakawa, Takeharu

AU - Yonehara, Atsunori

PY - 2020/2

Y1 - 2020/2

N2 - We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens from the fact that the anomaly pattern can be decomposed into two parts produced by two binary-lens events, in which one binary pair has a mass ratio of ∼0.01 between the lens components and the other pair has a mass ratio of ∼0.3. We find two sets of degenerate solutions, in which one solution has a projected separation between the primary and its stellar companion less than the angular Einstein radius θE (close solution), while the other solution has a separation greater than θE (wide solution). From the Bayesian analysis with the constraints of the event timescale and angular Einstein radius, we find that the planet has a mass of 4.4-2.0+3.0MJ and the stellar binary components have masses of 0.42-0.19+0.29M⊙ and 0.12-0.05+0.08M⊙, respectively, and the distance to the lens is DL=7.6-0.9+1.2kpc. The planet is a circumstellar planet according to the wide solution, while it is a circumbinary planet according to the close solution.

AB - We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens from the fact that the anomaly pattern can be decomposed into two parts produced by two binary-lens events, in which one binary pair has a mass ratio of ∼0.01 between the lens components and the other pair has a mass ratio of ∼0.3. We find two sets of degenerate solutions, in which one solution has a projected separation between the primary and its stellar companion less than the angular Einstein radius θE (close solution), while the other solution has a separation greater than θE (wide solution). From the Bayesian analysis with the constraints of the event timescale and angular Einstein radius, we find that the planet has a mass of 4.4-2.0+3.0MJ and the stellar binary components have masses of 0.42-0.19+0.29M⊙ and 0.12-0.05+0.08M⊙, respectively, and the distance to the lens is DL=7.6-0.9+1.2kpc. The planet is a circumstellar planet according to the wide solution, while it is a circumbinary planet according to the close solution.

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DO - 10.3847/1538-3881/ab5db9

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SN - 0004-6256

VL - 159

JO - Astronomical Journal

JF - Astronomical Journal

IS - 2

M1 - ab5db9

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OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System

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