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Beteiligte Max-Planck-Institute |
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MPI für Astrophysik |
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Autoren |
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White, M.; Hernquist, L.; Springel, V. |
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Publikationstyp |
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Artikel |
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Titel |
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Simulating the Sunyaev-Zeldovich effect(s): Including radiative cooling and energy injection by galactic winds |
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Zusammenfassung |
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We present results on the thermal and kinetic Sunyaev-Zeldovich (SZ) effects from a sequence of high-resolution hydrodynamic simulations of structure formation, including cooling, feedback, and metal injection. These simulations represent a self-consistent thermal model that incorporates ideas from the "preheating " scenario while preserving good agreement with the low-density intergalactic medium at z similar to 3 probed by the Lyalpha forest. Four simulations were performed, at two different resolutions with and without radiative effects and star formation. The long-wavelength modes in each simulation were the same, so we can compare the results on an object-by- object basis. We demonstrate that our simulations are converged to the subarcminute level. The effect of the additional physics is to suppress the mean Comptonization parameter by 20% and to suppress the angular power spectrum of fluctuations by just under a factor of 2 in this model, while leaving the source counts and properties relatively unchanged. We quantify how non-Gaussianity in the SZ maps increases the sample variance over the standard result for Gaussian fluctuations. We identify a large scatter in the Y-M relation that will be important in searches for clusters using the SZ effect(s). |
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Quelle |
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The Astrophysical Journal 579 (1), 16-22 (2002) |
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Sprache |
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English |
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Identifikation |
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ISI 000178817200003
ISSN 0004-637X |
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Schlagworte |
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cosmic microwave background; cosmology : theory; galaxies : clusters : general; large-scale structure of universe; methods : numerical |
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© 2009, Max-Planck-Gesellschaft, München |
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