6533b86efe1ef96bd12cbc15

RESEARCH PRODUCT

Studying the microlenses mass function from statistical analysis of the caustic concentration

T. MediavillaEvencio MediavillaO. ArizaJ. A. Muñoz

subject

PhysicsHistoryStellar massQuasarAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGalaxyComputer Science ApplicationsEducationlaw.inventionLens (optics)StarslawPolygonProbability distributionAstrophysics::Earth and Planetary AstrophysicsCaustic (optics)Astrophysics::Galaxy Astrophysics

description

The statistical distribution of caustic crossings by the images of a lensed quasar depends on the properties of the distribution of microlenses in the lens galaxy. We use a procedure based in Inverse Polygon Mapping to easily identify the critical and caustic curves generated by a distribution of stars in the lens galaxy. We analyze the statistical distributions of the number of caustic crossings by a pixel size source for several projected mass densities and different mass distributions. We compare the results of simulations with theoretical binomial distributions. Finally we apply this method to the study of the stellar mass distribution in the lens galaxy of QSO 2237+0305.

yearjournalcountryeditionlanguage
2011-09-22Journal of Physics: Conference Series
https://doi.org/10.1088/1742-6596/314/1/012108