Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866910463418171392 |
|---|---|
| author | Wu, Zexuan Dong, Subo Yi, Tuan Liu, Zhuokai El-Badry, Kareem Gould, Andrew Wyrzykowski, L. Rybicki, K. A. Bachelet, Etienne Christie, Grant W. de Almeida, L. Monard, L. A. G. McCormick, J. Natusch, Tim Zielinski, P. Chen, Huiling Huang, Yang Liu, Chang Merand, A. Mroz, Przemek Shangguan, Jinyi Udalski, Andrzej Woillez, J. Zhang, Huawei Hambsch, Franz-Josef Mikolajczyk, P. J. Gromadzki, M. Ratajczak, M. Kruszynska, Katarzyna Ihanec, N. Pylypenko, Uliana Sitek, M. Howil, K. Zola, Staszek Michniewicz, Olga Zejmo, Michal Lewis, Fraser Bronikowski, Mateusz Potter, Stephen Andrzejewski, Jan Merc, Jaroslav Street, Rachel Fukui, Akihiko Jaimes, R. Figuera Bozza, V. Rota, P. Cassan, A. Dominik, M. Tsapras, Y. Hundertmark, M. Wambsganss, J. Bakowska, K. Slowikowska, A. |
| author_facet | Wu, Zexuan Dong, Subo Yi, Tuan Liu, Zhuokai El-Badry, Kareem Gould, Andrew Wyrzykowski, L. Rybicki, K. A. Bachelet, Etienne Christie, Grant W. de Almeida, L. Monard, L. A. G. McCormick, J. Natusch, Tim Zielinski, P. Chen, Huiling Huang, Yang Liu, Chang Merand, A. Mroz, Przemek Shangguan, Jinyi Udalski, Andrzej Woillez, J. Zhang, Huawei Hambsch, Franz-Josef Mikolajczyk, P. J. Gromadzki, M. Ratajczak, M. Kruszynska, Katarzyna Ihanec, N. Pylypenko, Uliana Sitek, M. Howil, K. Zola, Staszek Michniewicz, Olga Zejmo, Michal Lewis, Fraser Bronikowski, Mateusz Potter, Stephen Andrzejewski, Jan Merc, Jaroslav Street, Rachel Fukui, Akihiko Jaimes, R. Figuera Bozza, V. Rota, P. Cassan, A. Dominik, M. Tsapras, Y. Hundertmark, M. Wambsganss, J. Bakowska, K. Slowikowska, A. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_03944 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization Wu, Zexuan Dong, Subo Yi, Tuan Liu, Zhuokai El-Badry, Kareem Gould, Andrew Wyrzykowski, L. Rybicki, K. A. Bachelet, Etienne Christie, Grant W. de Almeida, L. Monard, L. A. G. McCormick, J. Natusch, Tim Zielinski, P. Chen, Huiling Huang, Yang Liu, Chang Merand, A. Mroz, Przemek Shangguan, Jinyi Udalski, Andrzej Woillez, J. Zhang, Huawei Hambsch, Franz-Josef Mikolajczyk, P. J. Gromadzki, M. Ratajczak, M. Kruszynska, Katarzyna Ihanec, N. Pylypenko, Uliana Sitek, M. Howil, K. Zola, Staszek Michniewicz, Olga Zejmo, Michal Lewis, Fraser Bronikowski, Mateusz Potter, Stephen Andrzejewski, Jan Merc, Jaroslav Street, Rachel Fukui, Akihiko Jaimes, R. Figuera Bozza, V. Rota, P. Cassan, A. Dominik, M. Tsapras, Y. Hundertmark, M. Wambsganss, J. Bakowska, K. Slowikowska, A. Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics 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. |
| title | Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-Velocity Characterization |
| topic | Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2309.03944 |