Kinematics of lensed galaxies with 3D Bayesian model
Francesca Rizzo · 2019
The spatially resolved kinematics of high-redshift galaxies is a fundamental tool to understand the interplay between dark matter and baryons. However, a robust interpretation of the kinematic properties of these galaxies is hampered by the low spatial resolution and signal-to-noise ratio of available observations. These limitations can be overcome by targeting strong gravitationally lensed galaxies. Furthermore, the magnification of gravitational lensing offers the possibility to study galaxies in the low-mass range of 10ˆ8-10^9 solar masses. In this talk, I will present a new code that allows to simultaneously recover the lens-mass distribution and the source kinematics directly from the 3D data cube. I will show some tests, obtained by applying this new technique to simulated OSIRIS observations of star forming lensed galaxies with different kinematic properties. These tests ensure that this method represents a unique approach for measuring the detailed kinematic properties of high-redshift lensed galaxies. Finally, I will show some applications of this novel technique on a sample of z~2-3 lensed galaxies aimed at deriving the Tully-Fisher relation and their dark matter content.