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.
18 pages, updated with version accepted to PASP
References in corpus (6)
- A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
- Systematic KMTNet Planetary Anomaly Search, Paper I: OGLE-2019-BLG-1053Lb, A Buried Terrestrial Planet
- 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
- RTModel: a platform for real-time modeling and massive analysis of microlensing events