Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging
Langue
en
Article de revue
Ce document a été publié dans
Research in Astronomy and Astrophysics. 2021, vol. 21
IOP Publishing
Résumé en anglais
We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of the light blended with the microlensed ...Lire la suite >
We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of the light blended with the microlensed source to be K = 16.79 ± 0.04 mag and J = 17.76 ± 0.03 mag. Assuming that the blend is the lens star, we find that the host is a ${0.73}_{-0.29}^{+0.14}{M}_{\odot }$ star at a distance of ${2.67}_{-1.41}^{+0.77}$ kpc, where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty. With mass of ${M}_{p}={3.68}_{-1.44}^{+0.69}{M}_{J}$ , the planet is likely a "super Jupiter" at a projected separation of ${r}_{\perp }={4.53}_{-2.50}^{+1.49}$ AU, and a degenerate model yields a similar ${M}_{p}={3.73}_{-1.47}^{+0.73}{M}_{J}$ at a closer separation of ${r}_{\perp }={2.56}_{-1.41}^{+0.84}$ AU. Our estimates are consistent with the previous Bayesian analysis based on a Galactic model. OGLE-2014-BLG-0676Lb belongs to a sample of planets discovered in a "second-generation" planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets. *This paper includes data gathered with the 6.5m Magellan Clay Telescope at Las Campanas Observatory, Chile.< Réduire
Mots clés en anglais
gravitational lensing: micro
instrumentation: adaptive optics
instrumentation: high angular resolution
(stars:) planetary systems
Astrophysics - Earth and Planetary Astrophysics
Astrophysics - Astrophysics of Galaxies
Astrophysics - Solar and Stellar Astrophysics
Project ANR
Statistiques des planètes proches de leur lieu de formation et leur distribution dans le disque et la barre de notre Galaxie
Origine
Importé de halUnités de recherche