KMT-2019-BLG-1715: Planetary Microlensing Event with Three Lens Masses and Two Source Stars
- Creators
- Han, Cheongho
- Udalski, Andrzej
- Kim, Doeone
- Jung, Youn Kil
- Lee, Chung-Uk
- Bond, Ian A.
- Albrow, Michael D.
- Chung, Sun-Ju
- Gould, Andrew
- Hwang, Kyu-Ha
- Kim, Hyoun-Woo
- Ryu, Yoon-Hyun
- Shin, In-Gu
- Shvartzvald, Yossi
- Zang, Weicheng
- Yee, Jennifer C.
- 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
- Mróz, Przemek
- Szymański, Michał K.
- Skowron, Jan
- Poleski, Radek
- Soszyński, Igor
- Pietrukowicz, Paweł
- Kozłowski, Szymon
- Ulaczyk, Krzysztof
- Rybicki, Krzysztof A.
- Iwanek, Patryk
- Wrona, Marcin
- Gromadzki, Mariusz
- Abe, Fumio
- Barry, Richard
- Bennett, David P.
- Bhattacharya, Aparna
- Donachie, Martin
- Fujii, Hirosane
- Fukui, Akihiko
- Itow, Yoshitaka
- Hirao, Yuki
- Kirikawa, Rintaro
- Kondo, Iona
- Li, Man Cheung Alex
- Matsubara, Yutaka
- Muraki, Yasushi
- Miyazaki, Shota
- Ranc, Clément
- Rattenbury, Nicholas J.
- Satoh, Yuki
- Shoji, Hikaru
- Suematsu, Haruno
- Sumi, Takahiro
- Suzuki, Daisuke
- Tanaka, Yuzuru
- Tristram, Paul J.
- Yamakawa, Takeharu
- Yamawaki, Tsubasa
- Yonehara, Atsunori
- KMTNet Collaboration
- OGLE Collaboration
- MOA Collaboration
Abstract
We investigate the gravitational microlensing event KMT-2019-BLG-1715, the light curve of which shows two short-term anomalies from a caustic-crossing binary-lensing light curve: one with a large deviation and the other with a small deviation. We identify five pairs of solutions, in which the anomalies are explained by adding an extra lens or source component in addition to the base binary-lens model. We resolve the degeneracies by applying a method in which the measured flux ratio between the first and second source stars is compared with the flux ratio deduced from the ratio of the source radii. Applying this method leaves a single pair of viable solutions, in both of which the major anomaly is generated by a planetary-mass third body of the lens, and the minor anomaly is generated by a faint second source. A Bayesian analysis indicates that the lens comprises three masses: a planet-mass object with ~2.6 M_J and binary stars of K and M dwarfs lying in the galactic disk. We point out the possibility that the lens is the blend, and this can be verified by conducting high-resolution follow-up imaging for the resolution of the lens from the source.
Additional Information
© 2021. The American Astronomical Society. Received 2021 January 4; revised 2021 March 30; accepted 2021 March 31; published 2021 May 19. Work by C.H. was supported by grants from the National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965) Work by A.G. was supported by JPL grant 1500811. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A.U. The MOA project was supported by grants 19KK0082 and 20H04754. Work by Y.H. was supported by JSPS KAKENHI grant No. 17J02146. D.P.B., A.B., and C.R. were supported by NASA through grant NASA-80NSSC18K0274. Work by N.K. was supported by JSPS KAKENHI grant No. JP18J008. Work by C.R. was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by USRA through a contract with NASA. 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 three host sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia.Attached Files
Published - Han_2021_AJ_161_270.pdf
Submitted - 2104.00293.pdf
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Additional details
- Eprint ID
- 108679
- Resolver ID
- CaltechAUTHORS:20210409-141511091
- 2020R1A4A2002885
- National Research Foundation of Korea
- 2019R1A2C2085965
- National Research Foundation of Korea
- 1500811
- JPL
- MAESTRO 2014/14/A/ST9/00121
- National Science Centre (Poland)
- 19KK0082
- Japan Society for the Promotion of Science (JSPS)
- 20H04754
- Japan Society for the Promotion of Science (JSPS)
- 17J02146
- Japan Society for the Promotion of Science (JSPS)
- 80NSSC18K0274
- NASA
- JP18J008
- Japan Society for the Promotion of Science (JSPS)
- NASA Postdoctoral Program
- Created
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2021-04-12Created from EPrint's datestamp field
- Updated
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2021-05-26Created from EPrint's last_modified field