KMT-2018-BLG-1988Lb: Microlensing super-Earth orbiting a low-mass disk dwarf

被引：8

作者：

Han, Cheongho ^{[1
]}

Gould, Andrew ^{[3
,4
]}

Albrow, Michael D. ^{[5
]}

Chung, Sun-Ju ^{[6
]}

Hwang, Kyu-Ha ^{[6
]}

Jung, Youn Kil ^{[6
]}

Kim, Doeon ^{[1
]}

Lee, Chung-Uk ^{[6
]}

Ryu, Yoon-Hyun ^{[6
]}

Shin, In-Gu ^{[6
]}

Shvartzvald, Yossi ^{[7
]}

Yee, Jennifer C. ^{[8
]}

Zang, Weicheng ^{[2
]}

Cha, Sang-Mok ^{[6
,9
]}

Kim, Dong-Jin ^{[6
]}

Kim, Hyoun-Woo ^{[6
]}

Kim, Seung-Lee ^{[6
]}

Lee, Dong-Joo ^{[6
]}

Lee, Yongseok ^{[6
]}

Park, Byeong-Gon ^{[6
]}

Pogge, Richard W. ^{[4
]}

Kim, Chun-Hwey ^{[10
]}

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 28644, South Korea

[2] Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China

[3] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[4] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA

[5] Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch 8020, New Zealand

[6] Korea Astron & Space Sci Inst, Daejon 34055, South Korea

[7] Weizmanninst Sci, Dept Particle Phys & Astrophys, IL-76100 Rehovot, Israel

[8] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[9] Kyung Hee Univ, Sch Space Res, Yongin 17104, Kyeonggi, South Korea

[10] Chungbuk Natl Univ, Dept Astron & Space Sci, Cheongju 28644, South Korea

来源：

ASTRONOMY & ASTROPHYSICS | 2022年 / 658卷

基金：

新加坡国家研究基金会;

关键词：

gravitational lensing: micro; planets and satellites: detection; GRAVITATIONAL LENS; GALACTIC BULGE; PLANET; EVENTS; KMTNET; PHOTOMETRY; NETWORK; SYSTEMS; HOST;

D O I：

10.1051/0004-6361/202142077

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We reexamine high-magnification microlensing events in the previous data collected by the KMTNet survey with the aim of finding planetary signals that were not noticed before. In this work, we report the planetary system KMT-2018-BLG-1988L, which was found from this investigation. Methods. The planetary signal appears as a deviation with less than or similar to 0.2 mag from a single-lens light curve and lasted for about 6 h. The deviation exhibits a pattern of a dip surrounded by weak bumps on both sides of the dip. The analysis of the lensing light curve indicates that the signal is produced by a low-mass-ratio (q similar to 4 x 10(-5)) planetary companion located near the Einstein ring of the host star. Results. The mass of the planet, M-planet = 6.8(-3.5)(+4.7) M-circle plus ED and 5.6(-2.8)(+4.7) M-circle plus for the two possible solutions, estimated from the Bayesian analysis indicates that the planet is in the regime of a super-Earth. The host of the planet is a disk star with a mass of M-host = 0.47(-0.25)(+0.33) M-circle dot and a distance of D-L = 4.2(-14)(+1.8) kpc. KMT-2018-BLG-1988Lb is the 18th known microlensing planet with a mass below the upper limit of a super-Earth. The fact that 15 out of the 18 known microlensing planets with masses less than or similar to 10 M-circle plus were detected in the 5 yr following the full operation of the KMTNet survey indicates that the KMTNet database is an important reservoir of very low-mass planets.

引用

页数：8

共 27 条

[1] KMT-2018-BLG-1988Lb: Microlensing super-Earth orbiting a low-mass disk dwarf
Han, Cheongho
Gould, Andrew
Albrow, Michael D.
Chung, Sun-Ju
Hwang, Kyu-Ha
Kil Jung, Youn
Kim, Doeon
Lee, Chung-Uk
Ryu, Yoon-Hyun
Shin, In-Gu
Shvartzvald, Yossi
Yee, Jennifer C.
Zang, Weicheng
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Hyoun-Woo
Kim, Seung-Lee
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Kim, Chun-Hwey
Astronomy and Astrophysics, 2022, 658
[2] KMT-2018-BLG-1025Lb: microlensing super-Earth planet orbiting a low-mass star
Han, Cheongho
Udalski, Andrzej
Lee, Chung-Uk
Albrow, Michael D.
Chung, Sun-Ju
Gould, Andrew
Hwang, Kyu-Ha
Jung, Youn Kil
Kim, Doeon
Kim, Hyoun-Woo
Ryu, Yoon-Hyun
Shin, In-Gu
Shvartzvald, Yossi
Yee, Jennifer C.
Zang, Weicheng
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Seung-Lee
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Kim, Chun-Hwey
Kim, Woong-Tae
Mroz, Przemek
Szymanski, Michal K.
Skowron, Jan
Poleski, Radoslaw
Soszynski, Igor
Pietrukowicz, Pawel
Kozlowski, Szymon
Ulaczyk, Krzysztof
Rybicki, Krzysztof A.
Iwanek, Patryk
Wrona, Marcin
ASTRONOMY & ASTROPHYSICS, 2021, 649
[3] OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star
Han, C.
Hirao, Y.
Udalski, A.
Lee, C. -U.
Bozza, V.
Gould, A.
Abe, F.
Barry, R.
Bond, I. A.
Bennett, D. P.
Bhattacharya, A.
Donachie, M.
Evans, P.
Fukui, A.
Itow, Y.
Kawasaki, K.
Koshimoto, N.
Li, M. C. A.
Ling, C. H.
Matsubara, Y.
Miyazaki, S.
Munakata, H.
Muraki, Y.
Nagakane, M.
Ohnishi, K.
Ranc, C.
Rattenbury, N.
Saito, T.
Sharan, A.
Sullivan, D. J.
Sumi, T.
Suzuki, D.
Tristram, P. J.
Yamada, T.
Yonehara, A.
Mroz, P.
Poleski, R.
Kozlowski, S.
Soszynski, I.
Pietrukowicz, P.
Skowron, J.
Szymanski, M. K.
Ulaczyk, K.
Pawlak, M.
Rybicki, K.
Iwanek, P.
Albrow, M. D.
Chung, S. -J.
Hwang, K. -H.
Jung, Y. K.
ASTRONOMICAL JOURNAL, 2018, 155 (05):
[4] KMT-2023-BLG-1866Lb: Microlensing super-Earth around an M dwarf host
Han, Cheongho
Bond, Ian A.
Udalski, Andrzej
Lee, Chung-Uk
Gould, Andrew
Albrow, Michael D.
Chung, Sun-Ju
Hwang, Kyu-Ha
Jung, Youn Kil
Ryu, Yoon-Hyun
Shvartzvald, Yossi
Shin, In-Gu
Yee, Jennifer C.
Yang, Hongjing
Zang, Weicheng
Cha, Sang-Mok
Kim, Doeon
Kim, Dong-Jin
Kim, Seung-Lee
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Abe, Fumio
Bando, Ken
Barry, Richard
Bennett, David P.
Bhattacharya, Aparna
Fujii, Hirosame
Fukui, Akihiko
Hamada, Ryusei
Hamada, Shunya
Hamasaki, Naoto
Hirao, Yuki
Silva, Stela Ishitani
Itow, Yoshitaka
Kirikawa, Rintaro
Koshimoto, Naoki
Matsubara, Yutaka
Miyazaki, Shota
Muraki, Yasushi
Nagai, Tutumi
Nunota, Kansuke
Olmschenk, Greg
Ranc, Clement
Rattenbury, Nicholas J.
Satoh, Yuki
Sumi, Takahiro
Suzuki, Daisuke
Tomoyoshi, Mio
ASTRONOMY & ASTROPHYSICS, 2024, 687
[5] OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf
Kondo, Iona
Yee, Jennifer C.
Bennett, David P.
Sumi, Takahiro
Koshimoto, Naoki
Bond, Ian A.
Gould, Andrew
Udalski, Andrzej
Shvartzvald, Yossi
Jung, Youn Kil
Zang, Weicheng
Bozza, Valerio
Bachelet, Etienne
Hundertmark, Markus P. G.
Rattenbury, Nicholas J.
Abe, F.
Barry, R.
Bhattacharya, A.
Donachie, M.
Fukui, A.
Fujii, H.
Hirao, Y.
Silva, S. Ishitani
Itow, Y.
Kirikawa, R.
Li, M. C. A.
Matsubara, Y.
Miyazaki, S.
Muraki, Y.
Olmschenk, G.
Ranc, C.
Satoh, Y.
Shoji, H.
Suzuki, D.
Tanaka, Y.
Tristram, P. J.
Yamawaki, T.
Yonehara, A.
Mroz, P.
Poleski, R.
Skowron, J.
Szymanski, M. K.
Soszynski, I
Kozlowski, S.
Pietrukowicz, P.
Ulaczyk, K.
Rybicki, K. A.
Iwanek, P.
Wrona, M.
Albrow, M. D.
ASTRONOMICAL JOURNAL, 2021, 162 (02):
[6] OGLE-2014-BLG-0257L: A MICROLENSING BROWN DWARF ORBITING A LOW-MASS M DWARF
Han, C.
Jung, Y. K.
Udalski, A.
Gould, A.
Bozza, V.
Szymanski, M. K.
Soszynski, I.
Poleski, R.
Kozlowski, S.
Pietrukowicz, P.
Skowron, J.
Ulaczyk, K.
Wyrzykowski, L.
ASTROPHYSICAL JOURNAL, 2016, 822 (02):
[7] OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star
Han, Cheongho
Bennett, David P.
Udalski, Andrzej
Gould, Andrew
Bond, Ian A.
Shvartzvald, Yossi
Nikolaus, Kay-Sebastian
Hundertmark, Markus
Bozza, Valerio
Cassan, Arnaud
Hirao, Yuki
Bachelet, Etienne
Fouque, Pascal
Albrow, Michael D.
Chung, Sun-Ju
Hong, Kyeongsoo
Hwang, Kyu-Ha
Lee, Chung-Uk
Ryu, Yoon-Hyun
Shin, In-Gu
Yee, Jennifer C.
Jung, Youn Kil
Cha, Sang-Mok
Kim, Doeon
Kim, Dong-Jin
Kim, Hyoun-Woo
Kim, Seung-Lee
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Mroz, Przemek
Szymanski, Michal K.
Skowron, Jan
Poleski, Radek
Soszynski, Igor
Pietrukowicz, Pawel
Kozlowski, Szymon
Ulaczyk, Krzysztof
Rybicki, Krzysztof A.
Iwanek, Patryk
Wrona, Marcin
Abe, Fumio
Barry, Richard
Bhattacharya, Aparna
Donachie, Martin
Fukui, Akihiko
Itow, Yoshitaka
Kawasaki, Kohei
Kondo, Iona
ASTRONOMICAL JOURNAL, 2019, 158 (03):
[8] KMT-2018-BLG-0748Lb: sub-Saturn microlensing planet orbiting an ultracool host
Han, Cheongho
Shin, In-Gu
Jung, Youn Kil
Kim, Doeon
Yee, Jennifer C.
Albrow, Michael D.
Chung, Sun-Ju
Gould, Andrew
Hwang, Kyu-Ha
Lee, Chung-Uk
Ryu, Yoon-Hyun
Shvartzvald, Yossi
Zang, Weicheng
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Hyoun-Woo
Kim, Seung-Lee
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
ASTRONOMY & ASTROPHYSICS, 2020, 641
[9] OGLE-2018-BLG-0677Lb: A Super-Earth Near the Galactic Bulge
Herrera-Martin, Antonio
Albrow, M. D.
Udalski, A.
Gould, A.
Ryu, Y-H
Yee, J. C.
Chung, S-J
Han, C.
Hwang, K-H
Jung, Y. K.
Lee, C-U
Shin, I-G
Shvartzvald, Y.
Zang, W.
Cha, S-M
Kim, D-J
Kim, H-W
Kim, S-L
Lee, D-J
Lee, Y.
Park, B-G
Pogge, R. W.
Szymanski, M. K.
Mroz, P.
Skowron, J.
Poleski, R.
Soszynski, I
Kozlowski, S.
Pietrukowicz, P.
Ulaczyk, K.
Rybicki, K.
Iwanek, P.
Wrona, M.
ASTRONOMICAL JOURNAL, 2020, 159 (06):
[10] OGLE-2015-BLG-0051/KMT-2015-BLG-0048LB: A GIANT PLANET ORBITING A LOW-MASS BULGE STAR DISCOVERED BY HIGH-CADENCE MICROLENSING SURVEYS
Han, C.
Udalski, A.
Gould, A.
Bozza, V.
Jung, Y. K.
Albrow, M. D.
Kim, S. -L.
Lee, C. -U.
Cha, S. -M.
Kim, D. -J.
Lee, Y.
Park, B. -G.
Shin, I. -G.
Szymanski, M. K.
Soszynski, I.
Skowron, J.
Mroz, P.
Poleski, R.
Pietrukowicz, P.
Kozlowski, S.
Ulaczyk, K.
Wyrzykowski, L.
Pawlak, M.
ASTRONOMICAL JOURNAL, 2016, 152 (04):

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