| タイトル | Statistical Issues in Galaxy Cluster Cosmology |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140009244 |
| 著者（英） | Mantz, Adam |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2013-01-01 |
| 言語 | eng |
| 内容記述 | The number and growth of massive galaxy clusters are sensitive probes of cosmological structure formation. Surveys at various wavelengths can detect clusters to high redshift, but the fact that cluster mass is not directly observable complicates matters, requiring us to simultaneously constrain scaling relations of observable signals with mass. The problem can be cast as one of regression, in which the data set is truncated, the (cosmology-dependent) underlying population must be modeled, and strong, complex correlations between measurements often exist. Simulations of cosmological structure formation provide a robust prediction for the number of clusters in the Universe as a function of mass and redshift (the mass function), but they cannot reliably predict the observables used to detect clusters in sky surveys (e.g. X-ray luminosity). Consequently, observers must constrain observable-mass scaling relations using additional data, and use the scaling relation model in conjunction with the mass function to predict the number of clusters as a function of redshift and luminosity. |
| NASA分類 | Astrophysics |
| レポートNO | GSFC-E-DAA-TN9879 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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