We report the discovery of a giant exoplanet in the microlensing event OGLE-2017-BLG-1049, with a planet-host star mass ratio of q = 9.53 ± 0.39 × 10-3 and a caustic crossing feature in Korea Microlensing Telescope Network (KMTNet) observati...
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https://www.riss.kr/link?id=A107265813
Kim, Yun Hak ; Chung, Sun-Ju ; Udalski, A. ; Bond, Ian A. ; Jung, Youn Kil ; Gould, Andrew ; Albrow, Michael D. ; Han, Cheongho ; Hwang, Kyu-Ha ; 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, Chung-Uk ; Lee, Dong-Joo
2020
English
SCIE,SCOPUS,KCI등재
학술저널
161-168(8쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
We report the discovery of a giant exoplanet in the microlensing event OGLE-2017-BLG-1049, with a planet-host star mass ratio of q = 9.53 ± 0.39 × 10-3 and a caustic crossing feature in Korea Microlensing Telescope Network (KMTNet) observati...
We report the discovery of a giant exoplanet in the microlensing event OGLE-2017-BLG-1049, with a planet-host star mass ratio of q = 9.53 ± 0.39 × 10-3 and a caustic crossing feature in Korea Microlensing Telescope Network (KMTNet) observations. The caustic crossing feature yields an angular Einstein radius of θE = 0.52 ± 0.11 mas. However, the microlens parallax is not measured because the time scale of the event, tE ≃ 29 days, is too short. Thus, we perform a Bayesian analysis to estimate physical quantities of the lens system. We find that the lens system has a star with mass Mh = 0.55+0.36-0.29 M⊙ hosting a giant planet with Mp = 5.53+3.62-2.87 MJup, at a distance of DL = 5.67+1.11-1.52 kpc. The projected star-planet separation is a⊥ = 3.92+1.10-1.32 au. This means that the planet is located beyond the snow line of the host. The relative lens-source proper motion is μrel ~ 7 mas yr-1, thus the lens and source will be separated from each other within 10 years. After this, it will be possible to measure the flux of the host star with 30 meter class telescopes and to determine its mass.
MECHANISM INDUCING GAS SUPPLY TO THE CENTRAL 10 PARSEC OF THE MILKY WAY
OBSERVING SITES FOR THE CENTRAL SOLAR ECLIPSES IN ANCIENT CHINESE HISTORY
QUADRUPLY-IMAGED QUASARS: SOME GENERAL FEATURES