Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-velocity Characterization

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aut.relation.endpage62
aut.relation.issue2
aut.relation.journalAstronomical Journal
aut.relation.startpage62
aut.relation.volume168
dc.contributor.authorWu, Z
dc.contributor.authorDong, S
dc.contributor.authorYi, T
dc.contributor.authorLiu, Z
dc.contributor.authorEl-Badry, K
dc.contributor.authorGould, A
dc.contributor.authorWyrzykowski, L
dc.contributor.authorRybicki, KA
dc.contributor.authorBachelet, E
dc.contributor.authorChristie, GW
dc.contributor.authorde Almeida, L
dc.contributor.authorMonard, LAG
dc.contributor.authorMcCormick, J
dc.contributor.authorNatusch, T
dc.contributor.authorZieliński, P
dc.contributor.authorChen, H
dc.contributor.authorHuang, Y
dc.contributor.authorLiu, C
dc.contributor.authorMérand, A
dc.contributor.authorMróz, P
dc.contributor.authorShangguan, J
dc.contributor.authorUdalski, A
dc.contributor.authorWoillez, J
dc.contributor.authorZhang, H
dc.contributor.authorHambsch, FJ
dc.contributor.authorMikołajczyk, PJ
dc.contributor.authorGromadzki, M
dc.contributor.authorRatajczak, M
dc.contributor.authorKruszyńska, K
dc.contributor.authorIhanec, N
dc.contributor.authorPylypenko, U
dc.contributor.authorSitek, M
dc.contributor.authorHowil, K
dc.contributor.authorZola, S
dc.contributor.authorMichniewicz, O
dc.contributor.authorZejmo, M
dc.contributor.authorLewis, F
dc.contributor.authorBronikowski, M
dc.contributor.authorPotter, S
dc.contributor.authorAndrzejewski, J
dc.contributor.authorMerc, J
dc.contributor.authorStreet, R
dc.contributor.authorFukui, A
dc.contributor.authorFiguera Jaimes, R
dc.contributor.authorBozza, V
dc.contributor.authorRota, P
dc.contributor.authorCassan, A
dc.contributor.authorDominik, M
dc.contributor.authorTsapras, Y
dc.contributor.authorHundertmark, M
dc.contributor.authorWambsganss, J
dc.contributor.authorBąkowska, K
dc.contributor.authorSłowikowska, A
dc.date.accessioned2024-07-22T23:11:10Z
dc.date.available2024-07-22T23:11:10Z
dc.date.issued2024-07-09
dc.description.abstractWe 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 − 0.05 + 0.15 M J at a projected orbital separation r ⊥ = 1.4 − 0.3 + 0.8 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.
dc.identifier.citationAstronomical Journal, ISSN: 0004-6256 (Print); 1538-3881 (Online), American Astronomical Society, 168(2), 62-62. doi: 10.3847/1538-3881/ad5203
dc.identifier.doi10.3847/1538-3881/ad5203
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.urihttp://hdl.handle.net/10292/17811
dc.publisherAmerican Astronomical Society
dc.relation.urihttps://iopscience.iop.org/article/10.3847/1538-3881/ad5203
dc.rights.accessrightsOpenAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject5109 Space Sciences
dc.subject51 Physical Sciences
dc.subject0201 Astronomical and Space Sciences
dc.subjectAstronomy & Astrophysics
dc.subject5101 Astronomical sciences
dc.subject5107 Particle and high energy physics
dc.titleGaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-velocity Characterization
dc.typeJournal Article
pubs.elements-id563039
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