The Astronomical Journal (Jan 2023)
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,
- Leading Authors,
- 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,
- The MOA Collaboration,
- 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,
- The OGLE Collaboration,
- 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,
- The KMTNet Collaboration,
- 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 MiNDSTEp Collaboration
Affiliations
- Yuki K. Satoh
- ORCiD
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]; College of Science and Engineering, Kanto Gakuin University , 1-50-1 Mutsuurahigashi, Kanazawa-ku, Yokohama, Kanagawa 236-8501, Japan
- Naoki Koshimoto
- ORCiD
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- David P. Bennett
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Takahiro Sumi
- ORCiD
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Nicholas J. Rattenbury
- ORCiD
- Department of Physics, University of Auckland , Private Bag 92019, Auckland, New Zealand
- Daisuke Suzuki
- ORCiD
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Shota Miyazaki
- ORCiD
- Institute of Space and Astronautical Science , Japan Aerospace Exploration Agency, Kanagawa 252-5210, Japan
- Ian A. Bond
- Institute of Natural and Mathematical Sciences, Massey University , Auckland 0745, New Zealand
- Andrzej Udalski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Andrew Gould
- Max Planck Institute for Astronomy , Königstuhl 17, D-69117, Heidelberg, Germany; Department of Astronomy, Ohio State University , 140 W. 18th Avenue, Columbus, OH 43210, USA
- Valerio Bozza
- ORCiD
- Dipartimento di Fisica “E.R. Canianiello,” Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano, Italy; Istituto Nazionale di Fisica Nucleare , Sezione di Napoli, Napoli, Italy
- Martin Dominik
- ORCiD
- University of St Andrews , Centre for Exoplanet Science, SUPA School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS, UK
- Yuki Hirao
- ORCiD
- Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
- Iona Kondo
- ORCiD
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Rintaro Kirikawa
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Ryusei Hamada
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Leading Authors
- Fumio Abe
- Institute for Space–Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Richard Barry
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
- Aparna Bhattacharya
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Hirosane Fujii
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Akihiko Fukui
- ORCiD
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Instituto de Astrofísica de Canarias , Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain
- Katsuki Fujita
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Tomoya Ikeno
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Stela Ishitani Silva
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Physics, The Catholic University of America , Washington, DC 20064, USA
- Yoshitaka Itow
- ORCiD
- Institute for Space–Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Yutaka Matsubara
- ORCiD
- Institute for Space–Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Sho Matsumoto
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Yasushi Muraki
- ORCiD
- Institute for Space–Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
- Kosuke Niwa
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Arisa Okamura
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Greg Olmschenk
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
- Clément Ranc
- ORCiD
- Sorbonne Université , CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France
- Taiga Toda
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Mio Tomoyoshi
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Paul J. Tristram
- University of Canterbury Mt. John Observatory , P.O. Box 56, Lake Tekapo 8770, New Zealand
- Aikaterini Vandorou
- ORCiD
- Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Hibiki Yama
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- Kansuke Yamashita
- Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; [email protected]
- The MOA Collaboration
- Przemek Mróz
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Radosław Poleski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Jan Skowron
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Michał K. Szymański
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Radek Poleski
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Igor Soszyński
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Paweł Pietrukowicz
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Szymon Kozłowski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Krzysztof Ulaczyk
- ORCiD
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UK
- Krzysztof A. Rybicki
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland; Department of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 76100, Israel
- Patryk Iwanek
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Marcin Wrona
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Mariusz Gromadzki
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- The OGLE Collaboration
- Michael D. Albrow
- ORCiD
- University of Canterbury , Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020, New Zealand
- Sun-Ju Chung
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Cheongho Han
- ORCiD
- Department of Physics, Chungbuk National University , Cheongju 28644, Republic of Korea
- Kyu-Ha Hwang
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Doeon Kim
- Department of Physics, Chungbuk National University , Cheongju 28644, Republic of Korea
- Youn Kil Jung
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea; University of Science and Technology, Korea, (UST) , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- Hyoun Woo Kim
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Yoon-Hyun Ryu
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- In-Gu Shin
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Yossi Shvartzvald
- ORCiD
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 76100, Israel
- Hongjing Yang
- ORCiD
- Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University , Beijing 100084, People's Republic of China
- Jennifer C. Yee
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Weicheng Zang
- ORCiD
- Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University , Beijing 100084, People's Republic of China
- Sang-Mok Cha
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea; School of Space Research, Kyung Hee University , Yongin, Kyeonggi 17104, Republic of Korea
- Dong-Jin Kim
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Seung-Lee Kim
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Chung-Uk Lee
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Dong-Joo Lee
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
- Yongseok Lee
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea; School of Space Research, Kyung Hee University , Yongin, Kyeonggi 17104, Republic of Korea
- Byeong-Gon Park
- ORCiD
- Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea; University of Science and Technology, Korea, (UST) , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- Richard W. Pogge
- ORCiD
- Department of Astronomy, The Ohio State University , 140 W. 18th Avenue, Columbus, OH 43210, USA
- The KMTNet Collaboration
- Uffe G. Jørgensen
- ORCiD
- Centre for ExoLife Sciences, Niels Bohr Institute, University of Copenhagen , Øster Voldgade 5, DK-1350 Copenhagen, Denmark
- Penélope Longa-Peña
- Centro de Astronomía, Universidad de Antofagasta , Avenida Angamos 601, Antofagasta 1270300, Chile
- Sedighe Sajadian
- ORCiD
- Department of Physics, Isfahan University of Technology , Isfahan 84156-83111, Iran
- Jesper Skottfelt
- ORCiD
- Centre for Electronic Imaging, Department of Physical Sciences, The Open University , Milton Keynes MK7 6AA, UK
- Colin Snodgrass
- ORCiD
- Institute for Astronomy, University of Edinburgh , Royal Observatory, Edinburgh EH9 3HJ, UK
- Jeremy Tregloan-Reed
- ORCiD
- Instituto de Investigación en Astronomía y Ciencias Planetarias, Universidad de Atacama , Copayapu 485, Copiapó, Atacama, Chile
- Nanna Bach-Møller
- ORCiD
- Centre for Star and Planet Formation, Niels Bohr Institute, University of Copenhagen , Østervoldgade 5, DK-1350 Copenhagen, Denmark
- Martin Burgdorf
- ORCiD
- Universität Hamburg , Faculty of Mathematics, Informatics and Natural Sciences, Department of Earth Sciences, Meteorological Institute, Bundesstraße 55, D-20146 Hamburg, Germany
- Giuseppe D’Ago
- ORCiD
- Instituto de Astrofísica Pontificia Universidad Católica de Chile , Avenida Vicuna Mackenna 4860, Macul, Santiago, Chile
- Lauri Haikala
- ORCiD
- Instituto de Astronomía y Ciencias Planetarias , Universidad de Atacama, Copayapu 485, Copiapó, Chile
- James Hitchcock
- ORCiD
- University of St Andrews , Centre for Exoplanet Science, SUPA School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS, UK
- Markus Hundertmark
- ORCiD
- Zentrum für Astronomie der Universität Heidelberg , Astronomisches Rechen-Institut, Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
- Elahe Khalouei
- Astronomy Research Center, Research Institute of Basic Sciences, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- Nuno Peixinho
- ORCiD
- Instituto de Astrofísica e Ciências do Espaço, Departamento de Física, Universidade de Coimbra , PT3040-004 Coimbra, Portugal
- Sohrab Rahvar
- ORCiD
- Department of Physics, Sharif University of Technology , PO Box 11155-9161, Tehran, Iran
- John Southworth
- ORCiD
- Astrophysics Group, Keele University , Staffordshire ST5 5BG, UK
- Petros Spyratos
- Astrophysics Group, Keele University , Staffordshire ST5 5BG, UK
- The MiNDSTEp Collaboration
- DOI
- https://doi.org/10.3847/1538-3881/ace908
- Journal volume & issue
-
Vol. 166,
no. 3
p. 116
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 xallarap effect can fit the residuals very well and significantly improves χ ^2 values. On the other hand, by including the xallarap effect in our models, we find that binary-lens parameters such as mass ratio, q , and separation, s , cannot be constrained well. However, we also find that the parameters for the source system such as the orbital period and semimajor axis are consistent between all the models we analyzed. We therefore constrain the properties of the source system better than the properties of the lens system. The source system comprises a G-type main-sequence star orbited by a brown dwarf with a period of P ∼ 5 days. This analysis is the first to demonstrate that the xallarap effect does affect binary-lens parameters in planetary events. It would not be common for the presence or absence of the xallarap effect to affect lens parameters in events with long orbital periods of the source system or events with transits to caustics, but in other cases, such as this event, the xallarap effect can affect binary-lens parameters.
Keywords
