| Title: | Gaia22dkvLb : a microlensing planet potentially accessible to radial-velocity characterization |
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| Authors: | ID Wu, Zexuan (Author)
ID Dong, Subo (Author)
ID Yi, Tuan (Author)
ID Liu, Zhuokai (Author)
ID El-Badry, Kareem (Author)
ID Gould, Andrew (Author)
ID Wyrzykowski, Łukasz (Author)
ID Rybicki, K. A. (Author)
ID Bronikowski, Mateusz (Author), et al. |
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| Files: |  https://iopscience.iop.org/article/10.3847/1538-3881/ad5203
 Wu_2024_AJ_168_62.pdf (5,11 MB)
MD5: 8BAADA873AA0ECECE2E0B75B45635AD0
https://iopscience.iop.org/article/10.3847/1538-3881/ad5203
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| Language: | English |
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| Work type: | Unknown |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | We report discovering an exoplanet from following up a microlensing event alerted by Gaia. The event Gaia22dkv is toward a disk source rather than the traditional bulge microlensing fields. Our primary analysis yields a Jovian planet with M_p = 0.59 (+0.15, -0.05) M_J at a projected orbital separation r_perpendicular = 1.4 (+0.8, -0.3) au, and the host is a ∼1.1 M⊙ turnoff star at ∼1.3 kpc. At r' ~= 14, the host is far brighter than any previously discovered microlensing planet host, opening up the opportunity to test the microlensing model with radial velocity (RV) observations. RV data can be used to measure the planet's orbital period and eccentricity, and they also enable searching for inner planets of the microlensing cold Jupiter, as expected from the "inner–outer correlation" inferred from Kepler and RV discoveries. Furthermore, we show that Gaia astrometric microlensing will not only allow precise measurements of its angular Einstein radius θ_E but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to the definitive characterization of the lens system. |
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| Keywords: | gravitational microlensing exoplanet detection, planetary astrophysics, astrophysics of galaxies, instrumentation astrophysics, methods for astrophysics, solar astrophysics, stellar astrophysics |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2024 |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 1-17 |
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| Numbering: | Vol. 168, no. 2, [article no.] 62 |
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| PID: | 20.500.12556/RUNG-9234  |
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| COBISS.SI-ID: | 205054723 |
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| ISSN: | 0004-6256 |
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| UDC: | 524 |
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| ISSN on article: | 1538-3881 |
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| eISSN: | 1538-3881 |
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| DOI: | 10.3847/1538-3881/ad5203 |
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| NUK URN: | URN:SI:UNG:REP:R9SHU1SE |
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| Publication date in RUNG: | 23.08.2024 |
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| Views: | 336 |
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| Downloads: | 4 |
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