A Fast Image Simulation Method and Analysis for Astronomy Research

Image simulation has played an increasingly important role in astronomical research. There are several important effects as follow:Through simulation, important basis for the evaluation of astronomical observation equipment can be provided; Data processing algorithm can be verified through the processing of simulation data. In this paper, we describe the whole process of image simulation and optimize the local methods of image simulation, so that the simulation results can be generated efficiently and accurately. The main work of this paper includes the following aspects:Simulation for astronomical objects, including point sources (such as stars) and extended source (galaxies), and mainly the introduction of the galaxy simulation; Simulation of observation conditions, mainly including instrument noise, stray light etc.; Simulation of optical system character which shows in image as point spread function (PSF); Optimization of calculation flow from calculations and procedural methods; Analysis for extracted galaxies sample. The data used in this paper is Hubble Ultra Deep Space (HUDF) ACS WFC i-band (F775) data with a limit of magnitude equal to 29 AB Mag. Through the analysis of the simulation results, we can see that the method can simulate the galaxies images quickly and accurately.