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

Zexuan Wu; Subo Dong; Tuan Yi; Zhuokai Liu; Kareem El-Badry; Andrew Gould; L. Wyrzykowski; K. A. Rybicki; Etienne Bachelet; Grant W. Christie; L. de Almeida; L. A. G. Monard; J. McCormick; Tim Natusch; P. Zielinski; Huiling Chen; Yang Huang; Chang Liu; A. Merand; Przemek Mroz; Jinyi Shangguan; Andrzej Udalski; J. Woillez; Huawei Zhang; Franz-Josef Hambsch; P. J. Mikolajczyk; M. Gromadzki; M. Ratajczak; Katarzyna Kruszynska; N. Ihanec; Uliana Pylypenko; M. Sitek; K. Howil; Staszek Zola; Olga Michniewicz; Michal Zejmo; Fraser Lewis; Mateusz Bronikowski; Stephen Potter; Jan Andrzejewski; Jaroslav Merc; Rachel Street; Akihiko Fukui; R. Figuera Jaimes; V. Bozza; P. Rota; A. Cassan; M. Dominik; Y. Tsapras; M. Hundertmark; J. Wambsganss; K. Bakowska; A. Slowikowska

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

Zexuan Wu, Subo Dong, Tuan Yi, Zhuokai Liu, Kareem El-Badry, Andrew Gould, L. Wyrzykowski, K. A. Rybicki, Etienne Bachelet, Grant W. Christie, L. de Almeida, L. A. G. Monard, J. McCormick, Tim Natusch, P. Zielinski, Huiling Chen, Yang Huang, Chang Liu, A. Merand, Przemek MrozJinyi Shangguan, Andrzej Udalski, J. Woillez, Huawei Zhang, Franz-Josef Hambsch, P. J. Mikolajczyk, M. Gromadzki, M. Ratajczak, Katarzyna Kruszynska, N. Ihanec, Uliana Pylypenko, M. Sitek, K. Howil, Staszek Zola, Olga Michniewicz, Michal Zejmo, Fraser Lewis, Mateusz Bronikowski, Stephen Potter, Jan Andrzejewski, Jaroslav Merc, Rachel Street, Akihiko Fukui, R. Figuera Jaimes, V. Bozza, P. Rota, A. Cassan, M. Dominik, Y. Tsapras, M. Hundertmark, J. Wambsganss, K. Bakowska, A. Slowikowska

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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_perp = 1.4^{+0.8}_{-0.3} AU, and the host is a ~1.1 M_sun 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 of testing 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 theta_E, but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to definitive characterization of the lens system.

Original language	English
Journal	Astronomical Journal
Publication status	Accepted/In press - 30 May 2024

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https://arxiv.org/pdf/2309.03944

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Wu, Z., Dong, S., Yi, T., Liu, Z., El-Badry, K., Gould, A., Wyrzykowski, L., Rybicki, K. A., Bachelet, E., Christie, G. W., Almeida, L. D., Monard, L. A. G., McCormick, J., Natusch, T., Zielinski, P., Chen, H., Huang, Y., Liu, C., Merand, A., ... Slowikowska, A. (Accepted/In press). Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization. Astronomical Journal. https://arxiv.org/pdf/2309.03944

@article{9728dde4f74949de8e04395fe693a9e2,

title = "Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization",

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_perp = 1.4^{+0.8}_{-0.3} AU, and the host is a ~1.1 M_sun 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 of testing 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 theta_E, but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to definitive characterization of the lens system. ",

author = "Zexuan Wu and Subo Dong and Tuan Yi and Zhuokai Liu and Kareem El-Badry and Andrew Gould and L. Wyrzykowski and Rybicki, {K. A.} and Etienne Bachelet and Christie, {Grant W.} and Almeida, {L. de} and Monard, {L. A. G.} and J. McCormick and Tim Natusch and P. Zielinski and Huiling Chen and Yang Huang and Chang Liu and A. Merand and Przemek Mroz and Jinyi Shangguan and Andrzej Udalski and J. Woillez and Huawei Zhang and Franz-Josef Hambsch and Mikolajczyk, {P. J.} and M. Gromadzki and M. Ratajczak and Katarzyna Kruszynska and N. Ihanec and Uliana Pylypenko and M. Sitek and K. Howil and Staszek Zola and Olga Michniewicz and Michal Zejmo and Fraser Lewis and Mateusz Bronikowski and Stephen Potter and Jan Andrzejewski and Jaroslav Merc and Rachel Street and Akihiko Fukui and Jaimes, {R. Figuera} and V. Bozza and P. Rota and A. Cassan and M. Dominik and Y. Tsapras and M. Hundertmark and J. Wambsganss and K. Bakowska and A. Slowikowska",

year = "2024",

month = may,

day = "30",

language = "English",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

}

Wu, Z, Dong, S, Yi, T, Liu, Z, El-Badry, K, Gould, A, Wyrzykowski, L, Rybicki, KA, Bachelet, E, Christie, GW, Almeida, LD, Monard, LAG, McCormick, J, Natusch, T, Zielinski, P, Chen, H, Huang, Y, Liu, C, Merand, A, Mroz, P, Shangguan, J, Udalski, A, Woillez, J, Zhang, H, Hambsch, F-J, Mikolajczyk, PJ, Gromadzki, M, Ratajczak, M, Kruszynska, K, Ihanec, N, Pylypenko, U, Sitek, M, Howil, K, Zola, S, Michniewicz, O, Zejmo, M, Lewis, F, Bronikowski, M, Potter, S, Andrzejewski, J, Merc, J, Street, R, Fukui, A, Jaimes, RF, Bozza, V, Rota, P, Cassan, A, Dominik, M, Tsapras, Y, Hundertmark, M, Wambsganss, J, Bakowska, K & Slowikowska, A 2024, 'Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization', Astronomical Journal. <https://arxiv.org/pdf/2309.03944>

TY - JOUR

T1 - Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization

AU - Wu, Zexuan

AU - Dong, Subo

AU - Yi, Tuan

AU - Liu, Zhuokai

AU - El-Badry, Kareem

AU - Gould, Andrew

AU - Wyrzykowski, L.

AU - Rybicki, K. A.

AU - Bachelet, Etienne

AU - Christie, Grant W.

AU - Almeida, L. de

AU - Monard, L. A. G.

AU - McCormick, J.

AU - Natusch, Tim

AU - Zielinski, P.

AU - Chen, Huiling

AU - Huang, Yang

AU - Liu, Chang

AU - Merand, A.

AU - Mroz, Przemek

AU - Shangguan, Jinyi

AU - Udalski, Andrzej

AU - Woillez, J.

AU - Zhang, Huawei

AU - Hambsch, Franz-Josef

AU - Mikolajczyk, P. J.

AU - Gromadzki, M.

AU - Ratajczak, M.

AU - Kruszynska, Katarzyna

AU - Ihanec, N.

AU - Pylypenko, Uliana

AU - Sitek, M.

AU - Howil, K.

AU - Zola, Staszek

AU - Michniewicz, Olga

AU - Zejmo, Michal

AU - Lewis, Fraser

AU - Bronikowski, Mateusz

AU - Potter, Stephen

AU - Andrzejewski, Jan

AU - Merc, Jaroslav

AU - Street, Rachel

AU - Fukui, Akihiko

AU - Jaimes, R. Figuera

AU - Bozza, V.

AU - Rota, P.

AU - Cassan, A.

AU - Dominik, M.

AU - Tsapras, Y.

AU - Hundertmark, M.

AU - Wambsganss, J.

AU - Bakowska, K.

AU - Slowikowska, A.

PY - 2024/5/30

Y1 - 2024/5/30

N2 - 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_perp = 1.4^{+0.8}_{-0.3} AU, and the host is a ~1.1 M_sun 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 of testing 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 theta_E, but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to definitive characterization of the lens system.

AB - 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_perp = 1.4^{+0.8}_{-0.3} AU, and the host is a ~1.1 M_sun 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 of testing 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 theta_E, but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to definitive characterization of the lens system.

M3 - Article

SN - 0004-6256

JO - Astronomical Journal

JF - Astronomical Journal

ER -

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

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