MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert

Greg Olmschenk; David P. Bennett; Ian A. Bond; Weicheng Zang; Youn Kil Jung; Jennifer C. Yee; Etienne Bachelet; Fumio Abe; Richard K. Barry; Aparna Bhattacharya; Hirosane Fujii; Akihiko Fukui; Yuki Hirao; Stela Ishitani Silva; Yoshitaka Itow; Rintaro Kirikawa; Iona Kondo; Naoki Koshimoto; Yutaka Matsubara; Sho Matsumoto; Shota Miyazaki; Brandon Munford; Yasushi Muraki; Arisa Okamura; Clément Ranc; Nicholas J. Rattenbury; Yuki Satoh; Takahiro Sumi; Daisuke Suzuki; Taiga Toda; Paul J. Tristram; Aikaterini Vandorou; Hibiki Yama; Michael D. Albrow; Sang Mok Cha; Sun Ju Chung; Andrew Gould; Cheongho Han; Kyu Ha Hwang; Dong Jin Kim; Hyoun Woo Kim; Seung Lee Kim; Chung Uk Lee; Dong Joo Lee; Yongseok Lee; Byeong Gon Park; Richard W. Pogge; Yoon Hyun Ryu; In Gu Shin; Yossi Shvartzvald; Grant Christie; Tony Cooper; John Drummond; Jonathan Green; Steve Hennerley; Jennie McCormick; L. A.G. Monard; Tim Natusch; Ian Porritt; Thiam Guan Tan; Shude Mao; Dan Maoz; Matthew T. Penny; Wei Zhu; V. Bozza; Arnaud Cassan; Martin Dominik; Markus Hundertmark; R. Figuera Jaimes; K. Kruszyńska; K. A. Rybicki; R. A. Street; Y. Tsapras; Joachim Wambsganss; Wyrzykowski; P. Zieliński; Gioia Rau

doi:10.3847/1538-3881/acbcc8

MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert

Greg Olmschenk, David P. Bennett, Ian A. Bond, Weicheng Zang, Youn Kil Jung, Jennifer C. Yee, Etienne Bachelet, Fumio Abe, Richard K. Barry, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho MatsumotoShota Miyazaki, Brandon Munford, Yasushi Muraki, Arisa Okamura, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, Michael D. Albrow, Sang Mok Cha, Sun Ju Chung, Andrew Gould, Cheongho Han, Kyu Ha Hwang, Dong Jin Kim, Hyoun Woo Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Grant Christie, Tony Cooper, John Drummond, Jonathan Green, Steve Hennerley, Jennie McCormick, L. A.G. Monard, Tim Natusch, Ian Porritt, Thiam Guan Tan, Shude Mao, Dan Maoz, Matthew T. Penny, Wei Zhu, V. Bozza, Arnaud Cassan, Martin Dominik, Markus Hundertmark, R. Figuera Jaimes, K. Kruszyńska, K. A. Rybicki, R. A. Street, Y. Tsapras, Joachim Wambsganss, Wyrzykowski, P. Zieliński, Gioia Rau

School of Physics and Astronomy

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3 Scopus citations

Abstract

We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio q=3.17-0.26+0.28×10-4, the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and near the edge of expected sample sensitivity. For these estimates we provide results using two mass-law priors: one assuming that all stars have an equal planet-hosting probability, and the other assuming that planets are more likely to orbit around more massive stars. In the first scenario, we estimate that the lens system is likely to be a planet of mass mplanet=46-24+42M⊕ and a host star of mass Mhost=0.43-0.23+0.39M⊙, located at a distance DL=7.49-1.13+0.99kpc . For the second scenario, we estimate mplanet=69-34+37M⊕, Mhost=0.66-0.32+0.35M⊙, and DL=7.81-0.93+0.93kpc . The planet has a projected separation as a fraction of the Einstein ring radius s=1.3807-0.0018+0.0018 . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models.

Original language	English
Article number	175
Journal	Astronomical Journal
Volume	165
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/acbcc8
State	Published - 1 Apr 2023

Funding

Funders	Funder number
Vermont Agency of Natural Resources
ANR-18-CE31-0002
Alexander von Humboldt-Stiftung
Horizon 2020
National Natural Science Foundation of China	12133005, CMS-CSST-2021-A11, AST-2108414
Ministerstwo Edukacji i Nauki	DIR/WK/2018/12
California Department of Fish and Game	TS 356/3-1
Bloom's Syndrome Foundation	2020740
National Aeronautics and Space Administration	80NSSC19K0291
Narodowe Centrum Nauki	2017/27/L/ST9/03221, 2018/30/M/ST9/00311
National Research Foundation of Korea	2020R1A4A2002885, 2019R1A2C2085965
Not added	101004719
Agence Nationale de la Recherche	ANR-18-CE31-0002

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10.3847/1538-3881/acbcc8

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Olmschenk, G., Bennett, D. P., Bond, I. A., Zang, W., Jung, Y. K., Yee, J. C., Bachelet, E., Abe, F., Barry, R. K., Bhattacharya, A., Fujii, H., Fukui, A., Hirao, Y., Silva, S. I., Itow, Y., Kirikawa, R., Kondo, I., Koshimoto, N., Matsubara, Y., ... Rau, G. (2023). MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert. Astronomical Journal, 165(4), Article 175. https://doi.org/10.3847/1538-3881/acbcc8

@article{7c6f88bcc349466e9d3167c475d7b2c9,

title = "MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert",

abstract = "We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio q=3.17-0.26+0.28×10-4, the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and near the edge of expected sample sensitivity. For these estimates we provide results using two mass-law priors: one assuming that all stars have an equal planet-hosting probability, and the other assuming that planets are more likely to orbit around more massive stars. In the first scenario, we estimate that the lens system is likely to be a planet of mass mplanet=46-24+42M⊕ and a host star of mass Mhost=0.43-0.23+0.39M⊙, located at a distance DL=7.49-1.13+0.99kpc . For the second scenario, we estimate mplanet=69-34+37M⊕, Mhost=0.66-0.32+0.35M⊙, and DL=7.81-0.93+0.93kpc . The planet has a projected separation as a fraction of the Einstein ring radius s=1.3807-0.0018+0.0018 . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models.",

author = "Greg Olmschenk and Bennett, {David P.} and Bond, {Ian A.} and Weicheng Zang and Jung, {Youn Kil} and Yee, {Jennifer C.} and Etienne Bachelet and Fumio Abe and Barry, {Richard K.} and Aparna Bhattacharya and Hirosane Fujii and Akihiko Fukui and Yuki Hirao and Silva, {Stela Ishitani} and Yoshitaka Itow and Rintaro Kirikawa and Iona Kondo and Naoki Koshimoto and Yutaka Matsubara and Sho Matsumoto and Shota Miyazaki and Brandon Munford and Yasushi Muraki and Arisa Okamura and Cl{\'e}ment Ranc and Rattenbury, {Nicholas J.} and Yuki Satoh and Takahiro Sumi and Daisuke Suzuki and Taiga Toda and Tristram, {Paul J.} and Aikaterini Vandorou and Hibiki Yama and Albrow, {Michael D.} and Cha, {Sang Mok} and Chung, {Sun Ju} and Andrew Gould and Cheongho Han and Hwang, {Kyu Ha} and Kim, {Dong Jin} and Kim, {Hyoun Woo} and Kim, {Seung Lee} and Lee, {Chung Uk} and Lee, {Dong Joo} and Yongseok Lee and Park, {Byeong Gon} and Pogge, {Richard W.} and Ryu, {Yoon Hyun} and Shin, {In Gu} and Yossi Shvartzvald and Grant Christie and Tony Cooper and John Drummond and Jonathan Green and Steve Hennerley and Jennie McCormick and Monard, {L. A.G.} and Tim Natusch and Ian Porritt and Tan, {Thiam Guan} and Shude Mao and Dan Maoz and Penny, {Matthew T.} and Wei Zhu and V. Bozza and Arnaud Cassan and Martin Dominik and Markus Hundertmark and Jaimes, {R. Figuera} and K. Kruszy{\'n}ska and Rybicki, {K. A.} and Street, {R. A.} and Y. Tsapras and Joachim Wambsganss and Wyrzykowski and P. Zieli{\'n}ski and Gioia Rau",

note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = apr,

day = "1",

doi = "10.3847/1538-3881/acbcc8",

language = "אנגלית",

volume = "165",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "4",

}

Olmschenk, G, Bennett, DP, Bond, IA, Zang, W, Jung, YK, Yee, JC, Bachelet, E, Abe, F, Barry, RK, Bhattacharya, A, Fujii, H, Fukui, A, Hirao, Y, Silva, SI, Itow, Y, Kirikawa, R, Kondo, I, Koshimoto, N, Matsubara, Y, Matsumoto, S, Miyazaki, S, Munford, B, Muraki, Y, Okamura, A, Ranc, C, Rattenbury, NJ, Satoh, Y, Sumi, T, Suzuki, D, Toda, T, Tristram, PJ, Vandorou, A, Yama, H, Albrow, MD, Cha, SM, Chung, SJ, Gould, A, Han, C, Hwang, KH, Kim, DJ, Kim, HW, Kim, SL, Lee, CU, Lee, DJ, Lee, Y, Park, BG, Pogge, RW, Ryu, YH, Shin, IG, Shvartzvald, Y, Christie, G, Cooper, T, Drummond, J, Green, J, Hennerley, S, McCormick, J, Monard, LAG, Natusch, T, Porritt, I, Tan, TG, Mao, S, Maoz, D, Penny, MT, Zhu, W, Bozza, V, Cassan, A, Dominik, M, Hundertmark, M, Jaimes, RF, Kruszyńska, K, Rybicki, KA, Street, RA, Tsapras, Y, Wambsganss, J, Wyrzykowski, Zieliński, P & Rau, G 2023, 'MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert', Astronomical Journal, vol. 165, no. 4, 175. https://doi.org/10.3847/1538-3881/acbcc8

TY - JOUR

T1 - MOA-2020-BLG-208Lb

T2 - Cool Sub-Saturn-mass Planet within Predicted Desert

AU - Olmschenk, Greg

AU - Bennett, David P.

AU - Bond, Ian A.

AU - Zang, Weicheng

AU - Jung, Youn Kil

AU - Yee, Jennifer C.

AU - Bachelet, Etienne

AU - Abe, Fumio

AU - Barry, Richard K.

AU - Bhattacharya, Aparna

AU - Fujii, Hirosane

AU - Fukui, Akihiko

AU - Hirao, Yuki

AU - Silva, Stela Ishitani

AU - Itow, Yoshitaka

AU - Kirikawa, Rintaro

AU - Kondo, Iona

AU - Koshimoto, Naoki

AU - Matsubara, Yutaka

AU - Matsumoto, Sho

AU - Miyazaki, Shota

AU - Munford, Brandon

AU - Muraki, Yasushi

AU - Okamura, Arisa

AU - Ranc, Clément

AU - Rattenbury, Nicholas J.

AU - Satoh, Yuki

AU - Sumi, Takahiro

AU - Suzuki, Daisuke

AU - Toda, Taiga

AU - Tristram, Paul J.

AU - Vandorou, Aikaterini

AU - Yama, Hibiki

AU - Albrow, Michael D.

AU - Cha, Sang Mok

AU - Chung, Sun Ju

AU - Gould, Andrew

AU - Han, Cheongho

AU - Hwang, Kyu Ha

AU - Kim, Dong Jin

AU - Kim, Hyoun Woo

AU - Kim, Seung Lee

AU - Lee, Chung Uk

AU - Lee, Dong Joo

AU - Lee, Yongseok

AU - Park, Byeong Gon

AU - Pogge, Richard W.

AU - Ryu, Yoon Hyun

AU - Shin, In Gu

AU - Shvartzvald, Yossi

AU - Christie, Grant

AU - Cooper, Tony

AU - Drummond, John

AU - Green, Jonathan

AU - Hennerley, Steve

AU - McCormick, Jennie

AU - Monard, L. A.G.

AU - Natusch, Tim

AU - Porritt, Ian

AU - Tan, Thiam Guan

AU - Mao, Shude

AU - Maoz, Dan

AU - Penny, Matthew T.

AU - Zhu, Wei

AU - Bozza, V.

AU - Cassan, Arnaud

AU - Dominik, Martin

AU - Hundertmark, Markus

AU - Jaimes, R. Figuera

AU - Kruszyńska, K.

AU - Rybicki, K. A.

AU - Street, R. A.

AU - Tsapras, Y.

AU - Wambsganss, Joachim

AU - Wyrzykowski,

AU - Zieliński, P.

AU - Rau, Gioia

PY - 2023/4/1

Y1 - 2023/4/1

N2 - We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio q=3.17-0.26+0.28×10-4, the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and near the edge of expected sample sensitivity. For these estimates we provide results using two mass-law priors: one assuming that all stars have an equal planet-hosting probability, and the other assuming that planets are more likely to orbit around more massive stars. In the first scenario, we estimate that the lens system is likely to be a planet of mass mplanet=46-24+42M⊕ and a host star of mass Mhost=0.43-0.23+0.39M⊙, located at a distance DL=7.49-1.13+0.99kpc . For the second scenario, we estimate mplanet=69-34+37M⊕, Mhost=0.66-0.32+0.35M⊙, and DL=7.81-0.93+0.93kpc . The planet has a projected separation as a fraction of the Einstein ring radius s=1.3807-0.0018+0.0018 . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models.

AB - We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass. With a mass ratio q=3.17-0.26+0.28×10-4, the planet lies near the peak of the mass-ratio function derived by the MOA collaboration and near the edge of expected sample sensitivity. For these estimates we provide results using two mass-law priors: one assuming that all stars have an equal planet-hosting probability, and the other assuming that planets are more likely to orbit around more massive stars. In the first scenario, we estimate that the lens system is likely to be a planet of mass mplanet=46-24+42M⊕ and a host star of mass Mhost=0.43-0.23+0.39M⊙, located at a distance DL=7.49-1.13+0.99kpc . For the second scenario, we estimate mplanet=69-34+37M⊕, Mhost=0.66-0.32+0.35M⊙, and DL=7.81-0.93+0.93kpc . The planet has a projected separation as a fraction of the Einstein ring radius s=1.3807-0.0018+0.0018 . As a cool sub-Saturn-mass planet, this planet adds to a growing collection of evidence for revised planetary formation models.

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U2 - 10.3847/1538-3881/acbcc8

DO - 10.3847/1538-3881/acbcc8

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AN - SCOPUS:85151829549

SN - 0004-6256

VL - 165

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - 175

ER -

MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert

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