Dark Energy Survey Year 1 results: Detection of Intra-cluster Light at Redshift $\sim$ 0.25
Creators: name: Zhang, Y.
name: Yanny, B.
name: Palmese, A.
name: Gruen, D.
name: To, C.
name: Rykoff, E. S.
name: Leung, Y.
name: Collins, C.
name: Hilton, M.
name: Abbott, T. M. C.
name: Annis, J.
name: Avila, S.
name: Bertin, E.
name: Brooks, D.
name: Burke, D. L.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Cunha, C. E.
name: D'Andrea, C. B.
name: Da Costa, L. N.
name: De Vicente, J.
name: Desai, S.
name: Diehl, H. T.
name: Dietrich, J. P.
name: Doel, P.
name: Drlica-Wagner, A.
name: Eifler, T. F.
name: Evrard, A. E.
name: Flaugher, B.
name: Fosalba, P.
name: Frieman, J.
name: Garc'Ia-Bellido, J.
name: Gaztanaga, E.
name: Gerdes, D. W.
name: Gruendl, R. A.
name: Gschwend, J.
name: Gutierrez, G.
name: Hartley, W. G.
name: Hollowood, D. L.
name: Honscheid, K.
name: Hoyle, B.
name: James, D. J.
name: Jeltema, T.
name: Kuehn, K.
name: Kuropatkin, N.
name: Li, T. S.
name: Lima, M.
name: Maia, M. A. G.
name: March, M.
name: Marshall, J. L.
name: Melchior, P.
name: Menanteau, F.
name: Miller, C. J.
name: Miquel, R.
name: Mohr, J. J.
name: Ogando, R. L. C.
name: Plazas, A. A.
name: Romer, A. K.
name: Sanchez, E.
name: Scarpine, V.
name: Schubnell, M.
name: Serrano, S.
name: Sevilla-Noarbe, I.
name: Smith, M.
name: Soares-Santos, M.
name: Sobreira, F.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Thomas, D.
name: Wester, W.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using data collected by the Dark Energy Survey (DES), we report the detection of intracluster light (ICL) with $\sim300$ galaxy clusters in the redshift range of 0.2-0.3. We design methods to mask detected galaxies and stars in the images and stack the cluster light profiles, while accounting for several systematic effects (sky subtraction, instrumental point-spread function, cluster selection effects and residual light in the ICL raw detection from background and cluster galaxies). The methods allow us to acquire high signal-to-noise measurements of the ICL and central galaxies (CGs), which we separate with radial cuts. The ICL appears as faint and diffuse light extending to at least 1 Mpc from the cluster center, reaching a surface brightness level of 30 mag arcsec$^{-2}$. The ICL and the cluster CG contribute to $44\%\pm17$\% of the total cluster stellar luminosity within 1 Mpc. The ICL color is overall consistent with that of the cluster red sequence galaxies, but displays the trend of becoming bluer with increasing radius. The ICL demonstrates an interesting self-similarity feature -- for clusters in different richness ranges, their ICL radial profiles are similar after scaling with cluster $R_\mathrm{200m}$, and the ICL brightness appears to be a good tracer of the cluster radial mass distribution. These analyses are based on the DES redMaPPer cluster sample identified in the first year of observations.
description: Revised to match the published version. Paper data available from https://des.ncsa.illinois.edu/releases/other/paper-data