Microlensing flux ratio predictions for Euclid
Abstract
Quasar microlensing flux ratios are used to unveil properties of the lenses in large collections of lensed quasars, like the ones expected to be produced by the Euclid survey. This is achieved using the direct survey products, without any (expensive) followup observations or monitoring. First, the theoretical flux ratio distribution of samples of hundreds of mock quasar lenses is calculated for different initial mass functions (IMFs) and Sérsic radial profiles for the lens compact matter distribution. Then, mock observations are created and compared to the models to recover the underlying one. The most important factor for determining the flux ratio properties of such samples is the value of the smooth matter fraction at the location of the multiple images. Doubly lensed CASTLESlike quasars are the most promising systems to constrain the IMF and the mass components for a sample of lenses.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 March 2019
 DOI:
 10.1093/mnras/sty3486
 arXiv:
 arXiv:1901.01246
 Bibcode:
 2019MNRAS.483.5583V
 Keywords:

 gravitational lensing: micro;
 galaxies: stellar content;
 Astrophysics  Astrophysics of Galaxies
 EPrint:
 14 pages, 12 figures, 3 tables, accepted for publication in MNRAS