Simulating the Sunyaev-Zeldovich Effect(s): Including Radiative Cooling and Energy Injection by Galactic Winds

By M. White, L. Hernquist, Volker Springel. 2002

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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 ~ 3 probed by the Lyα 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).

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/db81d38cbee43756a0135af37990957227f64125

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Citations in the corpus

IMPACT OF CLUSTER PHYSICS ON THE SUNYAEV–ZEL'DOVICH POWER SPECTRUM (2010, background): “The measured amplitude at ℓ = 3000 was 4.2 ± 1.5µK2, significantly below that predicted by halo model calculations (Komatsu & Seljak 2002) or simulations (White et al. 2002; Shaw et al. 2009; Sehgal et al. 2010), assuming WMAP7 cosmological parameters.”
A WEAK LENSING STUDY OF X-RAY GROUPS IN THE COSMOS SURVEY: FORM AND EVOLUTION OF THE MASS–LUMINOSITY RELATION (2009, background): “…SZ effect face other challenges such as the identification and removal of radio point-sources (Vale & White 2006), sky confusion owing to projection effects (White et al. 2002), and possibly a larger scatter in the Y-M relation than previously estimated due to feedback processes (Shaw et al. 2008).”
High-Resolution Observations of the Cosmic Microwave Background Power Spectrum with ACBAR (2002, methodology): “Analytic models and numerical simulations generally predict a SZE power spectrum with a broad peak at angular scales corresponding to ℓ ∼ 104 (White et al. 2002).”
SIMULATIONS OF THE MICROWAVE SKY (2009, background): “…of course many simulations of components of the microwave sky (e.g. Gawiser & Smoot 1997; Metzler 1998; Gawiser et al. 1998; Sokasian et al. 2001; White et al. 2002; da Silva et al. 2004; Diaferio et al. 2005; Motl et al. 2005; Nagai 2006; Hallman et al. 2007; Pfrommer et al. 2007; Roncarelli et…”
MASSIVE HALOS IN MILLENNIUM GAS SIMULATIONS: MULTIVARIATE SCALING RELATIONS (2009, unknown): “…via an integrated Sunyaev-Zeldovich (SZ) effect (Carlstrom 2004) or via X-ray imaging and spectroscopy, is a signal that scales as a power-law in mass with only ∼ 15% scatter (White et al. 2002; Kravtsov et al. 2006; Maughan 2007; O’Hara et al. 2007; Zhang et al. 2008; Jeltema et al. 2008).”
The history of star formation in a lcdm universe (2002, background): “We have already investigated effects of the winds on secondary anisotropies of the cosmic microwave background (White et al., 2002).”
Cosmological smoothed particle hydrodynamics simulations: a hybrid multiphase model for star formation (2002, background): “…out a detailed analysis of the predictions of the model for the cosmic star formation history in the ΛCDM cosmology (Springel & Hernquist, 2002b), and we analysed the impact of cooling, star formation, and winds on secondary anisotropies of the cosmic microwave background (White et al., 2002).”
SIMULATIONS OF THE SUNYAEV–ZEL'DOVICH POWER SPECTRUM WITH ACTIVE GALACTIC NUCLEUS FEEDBACK (2010, methodology): “Using this method there are large sample variances (White et al. 2002) associated with nearby cluster contamintion.”
HIGH-RESOLUTION CMB POWER SPECTRUM FROM THE COMPLETE ACBAR DATA SET (2008, background): “) and hydrodynamical simulations (Bond et al. 2005; White et al. 2002) suggest that the thermal Sunyaev-Zel'dovich effect power spectrum will exceed that of the primary CMB temperature anisotropies for ℓ 2500 at 150 GHz.”
Tracing cosmic evolution with clusters of galaxies (2004, background): “Information on galaxy colors will help to separate nearby objects from more distant ones, but the implications of sky confusion for making accurate mass measurements are still a matter to be reckoned with ssee, for example, White et al., 2002d.”