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@Article{WojtakOMPCSGSCBGLMMPRRSST:2018:UnEfIm,
               author = "Wojtak, R. and Old, L. and Mamon, G. A. and Pearce, F. R. and 
                         Carvalho, Reinaldo Ramos de and Sif{\'o}n, C. and Gray, M. E. and 
                         Skibba, R. A. and Croton, D. and Bamford, S. and Gifford, D. and 
                         von der Linden, A. and Muñoz-Cuartas, J. C. and M{\"u}ller, V. 
                         and Pearson, R. J. and Rozo, E. and Rykoff, E. and Saro, A. and 
                         Sepp, T. and Tempel, E.",
          affiliation = "{University of Copenhagen} and {University of Toronto} and 
                         {Sorbonne Universite} and {University of Nottingham} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Princeton 
                         University} and {University of Nottingham} and {University of 
                         California} and {Swinburne University of Technology} and 
                         {University of Nottingham} and {University of Michigan} and {Stony 
                         Brook University} and {Universidad de Antioquia} and 
                         {Leibniz-Institut fur Astrophysik Potsdam (AIP)} and {University 
                         of Birmingham} and {SLAC National Accelerator Laboratory} and 
                         {SLAC National Accelerator Laboratory} and {} and {Osservatorio 
                         Astronomico di Trieste} and {Leibniz-Institut fur Astrophysik 
                         Potsdam (AIP)}",
                title = "Galaxy Cluster Mass Reconstruction Project – IV. Understanding the 
                         effects of imperfect membership on cluster mass estimation",
              journal = "Monthly Notices of the Royal Astronomical Society",
                 year = "2018",
               volume = "481",
               number = "1",
                pages = "324--340",
                month = "Nov.",
             keywords = "methods: numerical, methods: statistical, galaxies: clusters: 
                         general, galaxies: haloes, galaxies: kinematics and dynamics, 
                         cosmology: observations.",
             abstract = "The primary difficulty in measuring dynamical masses of galaxy 
                         clusters from galaxy data lies in the separation between true 
                         cluster members from interloping galaxies along the line of sight. 
                         We study the impact of membership contamination and incompleteness 
                         on cluster mass estimates obtained with 25 commonly used 
                         techniques applied to nearly 1000 mock clusters with precise 
                         spectroscopic redshifts. We show that all methods overestimate or 
                         underestimate cluster masses when applied to contaminated or 
                         incomplete galaxy samples, respectively. This appears to be the 
                         main source of the intrinsic scatter in the mass scaling relation. 
                         Applying corrections based on a prior knowledge of contamination 
                         and incompleteness can reduce the scatter to the level of shot 
                         noise expected for poorly sampled clusters. We establish an 
                         empirical model quantifying the effect of imperfect membership on 
                         cluster mass estimation and discuss its universal and 
                         method-dependent features. We find that both imperfect membership 
                         and the response of the mass estimators depend on cluster mass, 
                         effectively causing a flattening of the estimatedtrue mass 
                         relation. Imperfect membership thus alters cluster counts 
                         determined from spectroscopic surveys, hence the cosmological 
                         parameters that depend on such counts.",
                  doi = "10.1093/mnras/sty2257",
                  url = "http://dx.doi.org/10.1093/mnras/sty2257",
                 issn = "0035-8711 and 1365-2966",
             language = "en",
           targetfile = "wojtak_galaxy.pdf",
        urlaccessdate = "25 nov. 2020"
}


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