Systematic KMTNet Planetary Anomaly Search. II. Six New q < 2 x 10-4 Mass-ratio Planets

被引：37

作者：

Hwang, Kyu-Ha ^{[1
]}

Zang, Weicheng ^{[2
,3
]}

Gould, Andrew ^{[4
,5
]}

Udalski, Andrzej ^{[6
]}

Bond, Ian A. ^{[7
]}

Yang, Hongjing ^{[2
,3
]}

Mao, Shude ^{[2
,3
,8
]}

Albrow, Michael D. ^{[9
]}

Chung, Sun-Ju ^{[1
,10
]}

Han, Cheongho ^{[11
]}

Jung, Youn Kil ^{[1
]}

Ryu, Yoon-Hyun ^{[1
]}

Shin, In-Gu ^{[1
]}

Shvartzvald, Yossi ^{[12
]}

Yee, Jennifer C. ^{[13
]}

Cha, Sang-Mok ^{[1
,14
]}

Kim, Dong-Jin ^{[1
]}

Kim, Hyoun-Woo ^{[1
]}

Kim, Seung-Lee ^{[1
,10
]}

Lee, Chung-Uk ^{[1
,10
]}

Lee, Dong-Joo ^{[1
]}

Lee, Yongseok ^{[1
,14
]}

Park, Byeong-Gon ^{[1
,10
]}

Pogge, Richard W. ^{[5
]}

Mroz, Przemek ^{[15
]}

Poleski, Radek ^{[5
,6
]}

Skowron, Jan ^{[6
]}

Szymanski, Michal K. ^{[6
]}

Soszynski, Igor ^{[6
]}

Pietrukowicz, Pawel ^{[6
]}

Kozlowski, Szymon ^{[6
]}

Ulaczyk, Krzysztof ^{[16
]}

Rybicki, Krzysztof A. ^{[6
]}

Iwanek, Patryk ^{[6
]}

Wrona, Marcin ^{[6
]}

Gromadzki, Mariusz ^{[6
]}

Abe, Fumio ^{[17
]}

Barry, Richard ^{[18
]}

Bennett, David P. ^{[18
,19
]}

Bhattacharya, Aparna ^{[18
,19
]}

Fujii, Hirosame ^{[17
]}

Fukui, Akihiko ^{[20
,21
]}

Hirao, Yuki ^{[22
]}

Itow, Yoshitaka ^{[17
]}

Kirikawa, Rintaro ^{[22
]}

Kondo, Iona ^{[22
]}

Koshimoto, Naoki ^{[23
,24
]}

Munford, Brandon ^{[25
]}

Matsubara, Yutaka ^{[17
]}

Miyazaki, Shota ^{[22
]}

机构：

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

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

[3] Tsinghua Univ, Tsinhua Ctr Astrophys, Beijing 100084, Peoples R China

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

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

[6] Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland

[7] Massey Univ, Inst Nat & Math Sci, Auckland 0745, New Zealand

[8] Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China

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

[10] Korea Univ Sci & Technol Korea UST, 217 Gajeong Ro, Daejeon 34113, South Korea

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

[12] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-76100 Rehovot, Israel

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

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

[15] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA

[16] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[17] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan

[18] NASA Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA

[19] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[20] Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[21] Inst Astrofis Canarias, Via Lactea S-N, E-38205 Tenerife, Spain

[22] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

[23] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[24] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[25] Univ Auckland, Dept Phys, Private Bag 92019, Auckland, New Zealand

[26] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France

[27] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[28] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2525210, Japan

[29] Univ Canterbury, Mt John Observ, POB 56, Lake Tekapo 8770, New Zealand

[30] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan

[31] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[32] CFHT Corp, 65-1238 Mamalahoa Hwy, Kamuela, HI 96743 USA

[33] Univ Toulouse, IRAP, UPS OMP, Toulouse, France

来源：

ASTRONOMICAL JOURNAL | 2022年 / 163卷 / 02期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

GRAVITATIONAL LENSING EXPERIMENT; MICROLENSING EVENTS; COLD NEPTUNE; SNOW LINE; PARALLAX; PHOTOMETRY; DISCOVERY; FREQUENCY; ALGORITHM; NETWORK;

D O I：

10.3847/1538-3881/ac38ad

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We apply the automated AnomalyFinder algorithm of Paper I to 2018-2019 light curves from the similar or equal to 13 deg(2) covered by the six KMTNet prime fields, with cadences Gamma >= 2 hr(-1). We find a total of 11 planets with mass ratios q < 2 x 10(-4), including 6 newly discovered planets, 1 planet that was reported in Paper I, and recovery of 4 previously discovered planets. One of the new planets, OGLE-2018-BLG-0977Lb, is in a planetary caustic event, while the other five (OGLE-2018-BLG-0506Lb, OGLE-2018-BLG-0516Lb, OGLE-2019-BLG-1492Lb, KMT-2019-BLG-0253, and KMT-2019-BLG-0953) are revealed by a "dip" in the light curve as the source crosses the host-planet axis on the opposite side of the planet. These subtle signals were missed in previous by-eye searches. The planet-host separations (scaled to the Einstein radius), s, and planet-host mass ratios, q, are, respectively, (s, q x 10(5)) = (0.88, 4.1), (0.96 +/- 0.10, 8.3), (0.94 +/- 0.07, 13), (0.97 +/- 0.07, 18), (0.97 +/- 0.04, 4.1), and (0.74, 18), where the " +/- " indicates a discrete degeneracy. The 11 planets are spread out over the range -5<logq<-3.7 q similar to 10(-5) from the 2018-2019 nonprime KMT fields, this result suggests that planets toward the bottom of this mass-ratio range may be more common than previously believed.

引用

页数：26

共 3 条

[1] Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10-4 Planets from the First 4 yr Survey
Zang, Weicheng
Jung, Youn Kil
Yang, Hongjing
Zhang, Xiangyu
Udalski, Andrzej
Yee, Jennifer C.
Gould, Andrew
Mao, Shude
Albrow, Michael D.
Chung, Sun-Ju
Han, Cheongho
Hwang, Kyu-Ha
Ryu, Yoon-Hyun
Shin, In-Gu
Shvartzvald, Yossi
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Hyoun-Woo
Kim, Seung-Lee
Lee, Chung-Uk
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Mroz, Przemek
Skowron, Jan
Poleski, Radoslaw
Szymanski, Michal K.
Soszynski, Igor
Pietrukowicz, Pawel
Kozlowski, Szymon
Ulaczyk, Krzysztof A.
Rybicki, Krzysztof
Iwanek, Patryk
Wrona, Marcin
Gromadzki, Mariusz
Wang, Hanyue
Zhang, Jiyuan
Zhu, Wei
ASTRONOMICAL JOURNAL, 2023, 165 (03):
[2] Systematic KMTNet Planetary Anomaly Search. X. Complete Sample of 2017 Prime-field Planets
Ryu, Yoon-Hyun
Udalski, Andrzej
Yee, Jennifer C.
Zang, Weicheng
Shvartzvald, Yossi
Han, Cheongho
Gould, Andrew
Albrow, Michael D.
Chung, Sun-Ju
Hwang, Kyu-Ha
Jung, Youn Kil
Shin, In-Gu
Yang, Hongjing
Cha, Sang-Mok
Kim, Dong-Jin
Kim, Seung-Lee
Lee, Chung-Uk
Lee, Dong-Joo
Lee, Yongseok
Park, Byeong-Gon
Pogge, Richard W.
Wang, Hanyue
Mroz, Przemek
Szymanski, Michal K.
Skowron, Jan
Poleski, Radek
Soszynski, Igor
Pietrukowicz, Pawel
Kozlowski, Szymon
Ulaczyk, Krzysztof
Rybicki, Krzysztof A.
Iwanek, Patryk
Wrona, Marcin
Beichman, Charles
Bryden, Geoffry
Carey, Sean
Henderson, Calen B.
Novati, Sebastiano Calchi
Zhu, Wei
Jacklin, Savannah
Penny, Matthew T.
ASTRONOMICAL JOURNAL, 2024, 167 (03):
[3] OGLE-2017-BLG-1434Lb: Eighth q < 1 x 10-4 Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function
Udalski, A.
Ryu, Y-H
Sajadian, S.
Gould, A.
Mroz, P.
Poleski, R.
Szymanski, M. K.
Skowron, J.
Soszynski, I
Kozlowski, S.
Pietrukowicz, P.
Ulaczyk, K.
Pawlak, M.
Rybicki, K.
Iwanek, P.
Albrow, M. D.
Chung, S-J
Han, C.
Hwang, K-H
Jung, Y. K.
Shin, I-G
Shvartzvald, Y.
Yee, J. C.
Zang, W.
Zhu, W.
Cha, S-M
Kim, D-J
Kim, H-W
Kim, S-L
Lee, C-U
Lee, D-J
Lee, Y.
Park, B-G
Pogge, R. W.
Bozza, V
Dominik, M.
Helling, C.
Hundertmark, M.
Jorgensen, U. G.
Longa-Pena, P.
Lowry, S.
Burgdorf, M.
Campbell-White, J.
Ciceri, S.
Evans, D.
Jaimes, R. Figuera
Fujii, Y., I
Haikala, L. K.
Henning, T.
Hinse, T. C.
ACTA ASTRONOMICA, 2018, 68 (01): : 1 - 42

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Systematic KMTNet Planetary Anomaly Search. II. Six New q &lt; 2 x 10-4 Mass-ratio Planets

Systematic KMTNet Planetary Anomaly Search. II. Six New q < 2 x 10-4 Mass-ratio Planets