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; Ł. 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, Ł. Wyrzykowski, P. Zieliński, Gioia Rau

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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 m_planet=46₋₂₄⁺⁴²M_⊕ and a host star of mass M_host=0.43_−0.23^+0.39M_⊙ , located at a distance D_L=7.49_−1.13^+0.99kpc . For the second scenario, we estimate m_planet=69₋₃₄⁺³⁷M_⊕ , M_host=0.66_−0.32^+0.35M_⊙ , and D_L=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
Number of pages	11
Journal	Astronomical Journal
Volume	165
Issue number	4
Early online date	24 Mar 2023
DOIs	https://doi.org/10.3847/1538-3881/acbcc8
Publication status	Published - 1 Apr 2023

Keywords

Astrophysics - Earth and Planetary Astrophysics
Astrophysics - Astrophysics of Galaxies

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10.3847/1538-3881/acbcc8

Olmschenk_2023_AJ_MOA-2020-BLG-208Lb_CC
Copyright © 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Final published version, 12.1 MBLicence: CC BY

http://adsabs.harvard.edu/abs/2022arXiv221002436O

ORP: Opticon RadioNet Pilot: ORP: Opticon RadioNet Pilot
Dominik, M. (PI)
European Commission
1/03/21 → 28/02/25
Project: Standard

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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{1c02f53da02e470a88879b7a36514f0a,

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.",

keywords = "Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Astrophysics of Galaxies",

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 Sang-Mok Cha and Sun-Ju Chung and Andrew Gould and Cheongho Han and Kyu-Ha Hwang and Dong-Jin Kim and Hyoun-Woo Kim and Seung-Lee Kim and Chung-Uk Lee and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Pogge, {Richard W.} and Yoon-Hyun Ryu and In-Gu Shin 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 Thiam-Guan Tan 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 {\L}. Wyrzykowski and P. Zieli{\'n}ski and Gioia Rau",

note = "Funding: This research uses data obtained through the Telescope Access Program (TAP), which has been funded by the TAP member institutes. W.Zang, S.M., and W.Zhu acknowledge support by the National Science Foundation of China (grant No. 12133005). W.Zhu acknowledges the science research grants from the China Manned Space Project with No. CMS-CSST-2021-A11. This research has made use of the KMTNet system operated by the Korea Astronomy and Space Science Institute (KASI) and the data were obtained at the host site of SSO in Australia. J.C.Y. acknowledges support from N.S.F grant No. AST-2108414. Y.S. acknowledges support from BSF grant No. 2020740. Work by C.H. was supported by the grants of National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965). E.B. gratefully acknowledges support from NASA grant 80NSSC19K0291. E.B.'s work was carried out within the framework of the ANR project COLD-WORLDS supported by the French National Agency for Research with the reference ANR-18-CE31-0002. {\L}.W., K.A.R., K.K., and P.Z. acknowledge the support from the Polish National Science Centre (NCN) grants Harmonia No. 2018/30/M/ST9/00311 and Daina No. 2017/27/L/ST9/03221 as well as the European Union's Horizon 2020 research and innovation program under grant agreement No. 101004719 (OPTICON-RadioNet Pilot, ORP) and MNiSW grant DIR/WK/2018/12. Y.T. acknowledges the support of DFG priority program SPP 1992 {"}Exploring the Diversity of Extrasolar Planets{"} (TS 356/3-1).",

year = "2023",

month = apr,

day = "1",

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

language = "English",

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, S-M, Chung, S-J, Gould, A, Han, C, Hwang, K-H, Kim, D-J, Kim, H-W, Kim, S-L, Lee, C-U, Lee, D-J, Lee, Y, Park, B-G, Pogge, RW, Ryu, Y-H, Shin, I-G, Shvartzvald, Y, Christie, G, Cooper, T, Drummond, J, Green, J, Hennerley, S, McCormick, J, Monard, LAG, Natusch, T, Porritt, I, Tan, T-G, 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, Ł, 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, Ł.

AU - Zieliński, P.

AU - Rau, Gioia

N1 - Funding: This research uses data obtained through the Telescope Access Program (TAP), which has been funded by the TAP member institutes. W.Zang, S.M., and W.Zhu acknowledge support by the National Science Foundation of China (grant No. 12133005). W.Zhu acknowledges the science research grants from the China Manned Space Project with No. CMS-CSST-2021-A11. This research has made use of the KMTNet system operated by the Korea Astronomy and Space Science Institute (KASI) and the data were obtained at the host site of SSO in Australia. J.C.Y. acknowledges support from N.S.F grant No. AST-2108414. Y.S. acknowledges support from BSF grant No. 2020740. Work by C.H. was supported by the grants of National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965). E.B. gratefully acknowledges support from NASA grant 80NSSC19K0291. E.B.'s work was carried out within the framework of the ANR project COLD-WORLDS supported by the French National Agency for Research with the reference ANR-18-CE31-0002. Ł.W., K.A.R., K.K., and P.Z. acknowledge the support from the Polish National Science Centre (NCN) grants Harmonia No. 2018/30/M/ST9/00311 and Daina No. 2017/27/L/ST9/03221 as well as the European Union's Horizon 2020 research and innovation program under grant agreement No. 101004719 (OPTICON-RadioNet Pilot, ORP) and MNiSW grant DIR/WK/2018/12. Y.T. acknowledges the support of DFG priority program SPP 1992 "Exploring the Diversity of Extrasolar Planets" (TS 356/3-1).

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.

KW - Astrophysics - Earth and Planetary Astrophysics

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.3847/1538-3881/acbcc8

DO - 10.3847/1538-3881/acbcc8

M3 - Article

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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