Data Analysis of MOA for Gravitational Microlensing Events with Durations Less than 2 Days by Using Brown Dwarfs Population<br/>

Please enable javascript in your browser.

Data Analysis of MOA for Gravitational Microlensing Events with Durations Less than 2 Days by Using Brown Dwarfs Population

687 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46485 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Rahvar, Sohrab
Abstract:
Gravitational Microlensing is one of the most powerful methods of detecting very low mass objects like Exoplanets and Brown dwarfs. The most important parameter that we can extract from a microlensing event is Einstein radius crossing time t_E. In this thesis, with performing Monte-Carlo simulation, we will obtain t_E distribution for brown dwarf population. Then we will show that this population can be a good candidate for very short microlensing events with t_E<2 days. The data set used in this analysis was taken in 2006 and 2007 seasons by the MOA-II survey, with the 1.8-m MOA-II telescope located at the Mt. John University Observatory, New Zealand
Keywords:
Gravitational Microlensing ; Extrasolar Planets ; Dwarf Galaxies ; Brawn Dwards