宇宙物理学研究系

研究キーワード

太陽系外惑星

研究分野

自然科学一般 / 宇宙惑星科学 / 太陽系外惑星
自然科学一般 / 天文学 / 重力マイクロレンズ、赤外線天文学

経歴

2022年10月

-

現在

国立研究開発法人宇宙航空研究開発機構宇宙科学研究所宇宙航空プロジェクト研究員

2021年4月

-

2022年9月

独立行政法人日本学術振興会特別研究員(PD)

学歴

2019年4月

-

2021年3月

大阪大学大学院理学研究科宇宙地球科学専攻博士後期課程

2017年4月

-

2019年3月

大阪大学大学院理学研究科宇宙地球科学専攻博士前期課程

2013年4月

-

2017年3月

大阪大学理学部物理学科

論文

12 3 4 5 >

OGLE-2014-BLG-0221Lb: A Jupiter Mass Ratio Companion Orbiting Either a Late-type Star or a Stellar Remnant

Rintaro Kirikawa Takahiro Sumi David P. Bennett Daisuke Suzuki Naoki Koshimoto Shota Miyazaki Ian A. Bond Andrzej Udalski Nicholas J. Rattenbury Fumio Abe Richard Barry Aparna Bhattacharya Hirosane Fujii Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Yoshitaka Itow Yutaka Matsubara Yasushi Muraki Greg Olmschenk Clément Ranc Yuki K. Satoh Mio Tomoyoshi Paul . J. Tristram Aikaterini Vandorou Hibiki Yama Kansuke Yamashita Przemek Mróz Radosław Poleski Jan Skowron Michał K. Szymański Igor Soszyński Paweł Pietrukowicz Szymon Kozłowski Krzysztof Ulaczyk Mateusz J. Mróz

The Astronomical Journal 2024年4月

Evidence That the Occurrence Rate of Hot Jupiters around Sun-like Stars Decreases with Stellar Age

Shota Miyazaki Kento Masuda

The Astronomical Journal 2023年11月

OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event

Yuki K. Satoh Naoki Koshimoto David P. Bennett Takahiro Sumi Nicholas J. Rattenbury Daisuke Suzuki Shota Miyazaki Ian A. Bond Andrzej Udalski Andrew Gould Valerio Bozza Martin Dominik Yuki Hirao Iona Kondo Rintaro Kirikawa Ryusei Hamada Fumio Abe Richard Barry Aparna Bhattacharya Hirosane Fujii Akihiko Fukui Katsuki Fujita Tomoya Ikeno Stela Ishitani Silva Yoshitaka Itow Yutaka Matsubara Sho Matsumoto Yasushi Muraki Kosuke Niwa Arisa Okamura Greg Olmschenk Clément Ranc Taiga Toda Mio Tomoyoshi Paul J. Tristram Aikaterini Vandorou Hibiki Yama Kansuke Yamashita Przemek Mróz Radosław Poleski Jan Skowron Michał K. Szymański Radek Poleski Igor Soszyński Paweł Pietrukowicz Szymon Kozłowski Krzysztof Ulaczyk Krzysztof A. Rybicki Patryk Iwanek Marcin Wrona Mariusz Gromadzki Michael D. Albrow Sun-Ju Chung Cheongho Han Kyu-Ha Hwang Doeon Kim Youn Kil Jung Hyoun Woo Kim Yoon-Hyun Ryu In-Gu Shin Yossi Shvartzvald Hongjing Yang Jennifer C. Yee Weicheng Zang Sang-Mok Cha Dong-Jin Kim Seung-Lee Kim Chung-Uk Lee Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge Uffe G. Jørgensen Penélope Longa-Peña Sedighe Sajadian Jesper Skottfelt Colin Snodgrass Jeremy Tregloan-Reed Nanna Bach-Møller Martin Burgdorf Giuseppe D’Ago Lauri Haikala James Hitchcock Markus Hundertmark Elahe Khalouei Nuno Peixinho Sohrab Rahvar John Southworth Petros Spyratos

The Astronomical Journal 166(3) 116-116 2023年8月

Abstract

We present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xalla...

Terrestrial- and Neptune-mass Free-Floating Planet Candidates from the MOA-II 9 yr Galactic Bulge Survey

Naoki Koshimoto Takahiro Sumi David P. Bennett Valerio Bozza Przemek Mróz Andrzej Udalski Nicholas J. Rattenbury Fumio Abe Richard Barry Aparna Bhattacharya Ian A. Bond Hirosane Fujii Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Yoshitaka Itow Rintaro Kirikawa Iona Kondo Yutaka Matsubara Shota Miyazaki Yasushi Muraki Greg Olmschenk Clément Ranc Yuki Satoh Daisuke Suzuki Mio Tomoyoshi Paul J. Tristram Aikaterini Vandorou Hibiki Yama Kansuke Yamashita

The Astronomical Journal 166(3) 107-107 2023年8月

Abstract

We report the discoveries of low-mass free-floating planet (FFP) candidates from the analysis of 2006–2014 MOA-II Galactic bulge survey data. In this data set, we found 6111 microlensing candidates and identified a statistical sample co...

Free-floating Planet Mass Function from MOA-II 9 yr Survey toward the Galactic Bulge

Takahiro Sumi Naoki Koshimoto David P. Bennett Nicholas J. Rattenbury Fumio Abe Richard Barry Aparna Bhattacharya Ian A. Bond Hirosane Fujii Akihiko Fukui Ryusei Hamada Yuki Hirao Stela Ishitani Silva Yoshitaka Itow Rintaro Kirikawa Iona Kondo Yutaka Matsubara Shota Miyazaki Yasushi Muraki Greg Olmschenk Clément Ranc Yuki Satoh Daisuke Suzuki Mio Tomoyoshi Paul . J. Tristram Aikaterini Vandorou Hibiki Yama Kansuke Yamashita

The Astronomical Journal 166(3) 108-108 2023年8月

Abstract

We present the first measurement of the mass function of free-floating planets (FFPs), or very wide orbit planets down to an Earth mass, from the MOA-II microlensing survey in 2006–2014. Six events are likely to be due to planets with E...

MISC

<123 4 5 >

Candidate Brown-dwarf Microlensing Events with Very Short Timescales and Small Angular Einstein Radii

Cheongho Han Chung-Uk Lee Andrzej Udalski Andrew Gould Ian A. Bond Valerio Bozza 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 Yuki Satoh Hikaru Shoji Haruno Suematsu Denis J. Sullivan Takahiro Sumi Daisuke Suzuki Paul J. Tristram Takeharu Yamakawa Tsubasa Yamawaki Atsunori Yonehara

The Astronomical Journal 159(4) 134-134 2019年10月

Short-timescale microlensing events are likely to be produced by substellar
brown dwarfs (BDs), but it is difficult to securely identify BD lenses based on
only event timescales

because short-timescale events can also be
produced by st...

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

The Astronomical Journal 159(2) 48-48 2019年9月

We report the discovery of 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 complex anomaly pattern can be
decomposed into two...

OGLE-2015-BLG-1649Lb: A gas giant planet around a low-mass dwarf

Masayuki Nagakane Chien-Hsiu Lee Naoki Koshimoto Daisuke Suzuki Andrzej Udalski Jean-Philippe Beaulieu Takahiro Sumi David Bennett Ian A. Bond Nicholas J. Rattenbury Etienne Bachelet Martin Dominik Fumio Abe Richard Barry Aparna Bhattacharya Martin Donachie H. Fujii Akihiko Fukui Yuki Hirao Yoshitaka Itow Y. Kamei Iona Kondo Man Cheung Alex Li Y. Matsubara Taro Matsuo Shota Miyazaki Yasushi Muraki Clément Ranc Hiroshi Shibai Haruno Suematsu Denis Sullivan P. Tristram T. Yamakawa A. Yonehara P. Mróz Radosław Poleski Jan Skowron M. Szymański I. Soszyński Pawel Pietrukowicz Szymon Kozłowski Krzysztof Ulaczyk Dan Bramich Arnaud Cassan R. Jaimes K. Horne Markus Hundertmark Shude Mao John Menzies R. Schmidt Colin Snodgrass Iain Steele Rachel Street Yiannis Tsapras Joachim Wambsganss Uffe Jørgensen Valerio Bozza P. Longã Nuno Peixinho Jesper Skottfelt John Southworth M. I. Andersen M. Burgdorf Giuseppe D'Ago Daniel Evans Tobias Hinse Heidi Korhonen Markus Rabus Sohrab Rahvar

The Astronomical Journal 158(5) 212-212 2019年7月

We report the discovery of an exoplanet in microlensing event
OGLE-2015-BLG-1649. The planet/host-star mass ratio is

and the projected separation normalized by the Einstein radius is

.
The upper limit of the lens f...

OGLE-2018-BLG-1011L\lowercase{b,c}: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star

Cheongho Han David P. Bennett Andrzej Udalski Andrew Gould Ian A. Bond Yossi Shvartzvald Kay-Sebastian Nikolaus Markus Hundertmark Valerio Bozza Arnaud Cassan Yuki Hirao Etienne Bachelet Michael D. Albrow Sun-Ju Chung Kyeongsoo Hong Kyu-Ha Hwang Chung-Uk Lee Yoon-Hyun Ryu In-Gu Shin Jennifer C. Yee Youn Kil Jung Sang-Mok Cha Doeon Kim Dong-Jin Kim Hyoun-Woo Kim Seung-Lee Kim Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge 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 Aparna Bhattacharya Martin Donachie Akihiko Fukui Yoshitaka Itow Kohei Kawasaki 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 Atsunori Yonehara Pascal Fouqué Shude Mao Tianshu Wang Weicheng Zang Wei Zhu Matthew T. Penny Charles A. Beichman Geoffery Bryden Sebastiano Calchi Novati B. Scott Gaudi Calen B. Henderson Savannah Jacklin Keivan G. Stassun

The Astronomical Journal 158(3) 114-114 2019年7月

We report a multiplanetary system found from the analysis of microlensing
event OGLE-2018-BLG-1011, for which the light curve exhibits a double-bump
anomaly around the peak. We find that the anomaly cannot be fully explained by
the binary-lens or ...

Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M-dwarf

Youn Kil Jung Andrew Gould Andrzej Udalski Takahiro Sumi Jennifer C. Yee Yossi Shvartzvald Weicheng Zang Cheongho Han Michael D. Albrow Sun Ju Chung Kyu-Ha Hwang Yoon-Hyun Ryu In-Gu Shin Wei Zhu Sang-Mok Cha Dong-Jin Kim Hyoun-Woo Kim Seung-Lee Kim Chung-Uk Lee Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W. Pogge Przemek Mróz Michał K. Szymański Jan Skowron Radek Poleski Igor Soszyński Paweł Pietrukowicz Szymon Kozłowski Krzystof Ulaczyk Krzysztof A. Rybicki Patryk Iwanek Marcin Wrona Charles A. Beichman Geoffery Bryden Sebastiano Calchi Novati Sean Carey B. Scott Gaudi Calen B. Henderson Fumio Abe Richard Barry David P. Bennett Ian A. Bond Aparna Bhattacharya Martin Donachie Akihiko Fukui Yuki Hirao Yoshitaka Itow Iona Kondo Naoki Koshimoto Man Cheung Alex Li Yutaka Matsubara Shota Miyazaki Yasushi Muraki Masayuki Nagakane Clément Ranc Nicholas J. Rattenbury Haruno Suematsu Denis J. Sullivan Daisuke Suzuki Paul J. Tristram Atsunori Yonehara Savannah Jacklin Matthew T. Penny Keivan G. Stassun

The Astronomical Journal 158(1) 28-28 2019年5月

We report the discovery of a

microlensing planet
OGLE-2018-BLG-0596Lb, with preferred planet-host mass ratio