### CosApps: Simulate gravitational lensing through ray tracing and shear calculation

Posted:

**Mon Jan 01, 2018 4:07 am**

CosApps: Simulate gravitational lensing through ray tracing and shear calculation

**Abstract**: Cosmology Applications (CosApps) provides tools to simulate gravitational lensing using two different techniques, ray tracing and shear calculation. The tool ray_trace_ellipse calculates deflection angles on a grid for light passing a deflecting mass distribution. Using MPI, ray_trace_ellipse may calculate deflection in parallel across network connected computers, such as cluster. The program physcalc calculates the gravitational lensing shear using the relationship of convergence and shear, described by a set of coupled partial differential equations.

**Credit**: Coss, David

**Site**: https://github.com/kd0kfo/cosmology

http://thesis.davecoss.com/

**Bibcode**: 2017ascl.soft12008C

**Preferred citation method**: http://adsabs.harvard.edu/abs/2010PhDT.......285C

**ID**: ascl:1712.008