A New Parameterization for Finding Solutions for Microlensing Exoplanet Light Curves
arXiv:2404.15502 · doi:10.1088/1538-3873/ad70d7
Abstract
The gravitational microlensing method of discovering exoplanets and multi-star systems can produce degenerate solutions, some of which require in-depth analysis to uncover. We propose a new parameter space that can be used to sample potential solutions more efficiently and is more robust at finding all degenerate solutions. We identified two new parameters, k and h, that can be sampled in place of the mass ratios and separations of the systems under analysis to identify degenerate solutions. The parameter k is related to the size of the central caustic, , while h is related to the distance of a point along the k contour from log(s)=0, where s is the projected planet-host separation. In this work, we present the characteristics of these parameters and the tests we conducted to prove their efficacy.
arXiv comment18 pages, updated with version accepted to PASP
References in corpus (17)
- emcee: The MCMC Hammer
- MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
- The Use of High Magnification Microlensing Events in Discovering Extra-solar Planets
- A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
- Resolution of the MACHO-LMC-5 Puzzle: The Jerk-Parallax Microlens Degeneracy
- Microlensing Event MOA-2007-BLG-400: Exhuming the Buried Signature of a Cool, Jovian-Mass Planet
- Acceleration and Parallax Effects in Gravitational Microlensing
- Properties of Central Caustics in Planetary Microlensing
- VBBinaryLensing: a public package for microlensing light curve computation
- Systematic KMTNet Planetary Anomaly Search, Paper I: OGLE-2019-BLG-1053Lb, A Buried Terrestrial Planet
- Modeling microlensing events with MulensModel
- Mass Production of 2021 KMTNet Microlensing Planets I
- KMT-2021-BLG-0171Lb and KMT-2021-BLG-1689Lb: Two Microlensing Planets in the KMTNet High-cadence Fields with Followup Observations
- Unveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth
- Reconciling the predictions of microlensing analysis with radial velocity measurements for OGLE-2011-BLG-0417
- A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb
- RTModel: a platform for real-time modeling and massive analysis of microlensing events