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Dark Energy Survey Year 1 Results: Detection of Intracluster Light at Redshift similar to 0.25

Author(s): Zhang, Y; Yanny, B; Palmese, A; Gruen, D; To, C; et al

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Abstract: Using data collected by the Dark Energy Survey (DES), we report the detection of intracluster light (ICL) with similar to 300 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 44% +/- 17% 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-200(m), 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.
Publication Date: 1-Apr-2019
Electronic Publication Date: 4-Apr-2019
Citation: Zhang, Y, Yanny, B, Palmese, A, Gruen, D, To, C, Rykoff, ES, Leung, Y, Collins, C, Hilton, M, Abbott, TMC, Annis, J, Avila, S, Bertin, E, Brooks, D, Burke, DL, Carnero Rosell, A, Kind, M Carrasco, Carretero, J, Cunha, CE, D Andrea, CB, da Costa, LN, De Vicente, J, Desai, S, Diehl, HT, Dietrich, JP, Doel, P, Drlica-Wagner, A, Eifler, TF, Evrard, AE, Flaugher, B, Fosalba, P, Frieman, J, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Gruendl, RA, Gschwend, J, Gutierrez, G, Hartley, WG, Hollowood, DL, Honscheid, K, Hoyle, B, James, DJ, Jeltema, T, Kuehn, K, Kuropatkin, N, Li, TS, Lima, M, Maia, MAG, March, M, Marshall, JL, Melchior, P, Menanteau, F, Miller, CJ, Miquel, R, Mohr, JJ, Ogando, RLC, Plazas, AA, Romer, AK, Sanchez, E, Scarpine, V, Schubnell, M, Serrano, S, Sevilla-Noarbe, I, Smith, M, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, Wester, W, Collaboration, DES. (2019). Dark Energy Survey Year 1 Results: Detection of Intracluster Light at Redshift similar to 0.25. ASTROPHYSICAL JOURNAL, 874 (10.3847/1538-4357/ab0dfd
DOI: doi:10.3847/1538-4357/ab0dfd
ISSN: 0004-637X
EISSN: 1538-4357
Type of Material: Journal Article
Journal/Proceeding Title: ASTROPHYSICAL JOURNAL
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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