Generalized Microlensing Effective Timescale
Earth and Planetary Astrophysics
2013-12-30 v2
Abstract
The microlensing effective timescale t_eff=beta*t_E is used frequently in high-magnification (beta << 1) microlensing events, because it is better constrained than either the impact parameter beta or the Einstein timescale t_E separately. It also facilitates intuitive understanding of lightcurves prior to determination of a model. Similar considerations may apply to very low magnification events. I therefore provide a generalization of this quantity to all events: t_eff = beta*t_E*sqrt((1+beta^2/2)(1+beta^2/4)).
Cite
@article{arxiv.1312.6692,
title = {Generalized Microlensing Effective Timescale},
author = {Andrew Gould},
journal= {arXiv preprint arXiv:1312.6692},
year = {2013}
}
Comments
Submitted to ApJ. 3 pages