Autor: Fraser, Lewis A. - Prolib Integro

Skocz do pozycji: 2.

Tytuł:: Gaia22dkvLb : a microlensing planet potentially accessible to radial-velocity characterization
Autorzy:: Christie, Grant W.
Cassan, A.
Bachelet, Etienne
Wyrzykowski, L.
Mikołajczyk, P. J.
Pylypenko, Uliana
Kruszyńska, Katarzyna
Ihanec, N.
Shangguan, Jinyi
Gromadzki, M.
Udalski, Andrzej
Dong, Subo
Wambsganss, J.
Zejmo, Michal
Liu, Chang
Mróz, Przemek
Merc, Jaroslav
Yi, Tuan
Andrzejewski, Jan
Street, Rachel
Howil, K.
Hambsch, Franz-Josef
Rybicki, K. A.
Rota, P.
de Almeida, L.
Woillez, J.
Sitek, M.
Potter, Stephen
Monard, L. A. G.
Bozza, V.
Mérand, A.
Lewis, Fraser
Bronikowski, Mateusz
Liu, Zhuokai
Zieliński, P.
Chen, Huiling
Hundertmark, M.
Zhang, Huawei
Tsapras, Y.
Huang, Yang
Michniewicz, Olga
Wu, Zexuan
McCormick, J.
Fukui, Akihiko
El-Badry, Kareem
Figuera Jaimes, R.
Słowikowska, A.
Gould, Andrew
Bąkowska, K.
Ratajczak, M.
Zoła, Stanisław
Dominik, M.
Natusch, Tim
Opis:: 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 $r_{\perp} =1.4^{+0.8}_{-0.3}$ u, and the host is a ∼1.1 M$_{\bigodot }$ turnoff star at ∼1.3 kpc. At $r' \approx 14$, 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.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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