DECam Community Science Workshop 2018: Science Highlights, Coming Opportunities, LSST Synergies
May 21-22, 2018 • Tucson, Arizona
DECam at the Low Surface Brightness Limit: Detection of Diffuse Light in Galaxies and Galaxy Clusters [3.88 MB PDF]
The enormous amount of data collected by DECam provides a great opportunity to study low surface brightness science, such as the faint diffuse light in galaxies and galaxy clusters. Through stacking the images of ~300 galaxy clusters from the Dark Energy Survey, we report the detection of diffuse intra-cluster light at a surface brightness level of 30 mag/arcsec^2 out to 1 Mpc from the cluster center. Despite their low surface brightness, our studies show that intra-cluster light is a significant component of galaxy cluster light. The stacking method is also applied to characterizing the light profile of luminous red galaxies to 200 kpc from the center, as well as studying the aureole component of DECam point spread function to 30 arcsecond and beyond.
Authors: Yuanyuan Zhang