Simulating the galaxy cluster "El Gordo": gas motion, kinetic Sunyaev-Zel'dovich signal, and X-ray line features

Abstract

The massive galaxy cluster "El Gordo" (ACT-CL J0102--4915) is a rare merging system with a high collision speed suggested by multi-wavelength observations and the theoretical modeling. Zhang et al. (2015) propose two types of mergers, a nearly head-on merger and an off-axis merger with a large impact parameter, to reproduce most of the observational features of the cluster, by using numerical simulations. The different merger configurations of the two models result in different gas motion in the simulated clusters. In this paper, we predict the kinetic Sunyaev-Zel'dovich (kSZ) effect, the relativistic correction of the thermal Sunyaev-Zel'dovich (tSZ) effect, and the X-ray spectrum of this cluster, based on the two proposed models. We find that (1) the amplitudes of the kSZ effect resulting from the two models are both on the order of $\Delta T/T\sim 10^{-5}$; but their morphologies are different, which trace the different line-of-sight velocity distributions of the systems; (2) the relativistic correction of the tSZ effect around $240\mathrm{GHz}$ can be possibly used to constrain the temperature of the hot electrons heated by the shocks; and (3) the shift between the X-ray spectral lines emitted from different regions of the cluster can be significantly different in the two models. The shift and the line broadening can be up to $\sim 25\mathrm{eV}$ and $50\mathrm{eV}$, respectively. We expect that future observations of the kSZ effect and the X-ray spectral lines (e.g., by ALMA, XARM) will provide a strong constraint on the gas motion and the merger configuration of ACT-CL J0102--4915.

arXiv comment10 pages, 6 figures, submitted to ApJ

References in corpus (32)

• GADGET: A code for collisionless and gasdynamical cosmological simulations
• The Sunyaev-Zel'dovich Effect
• Comparing the temperatures of galaxy clusters from hydro-N-body simulations to Chandra and XMM-Newton observations
• Comparing the temperatures of galaxy clusters from hydro-N-body simulations to Chandra and XMM-Newton observations
• The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
• Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• The Atacama Cosmology Telescope: Sunyaev Zel'dovich Selected Galaxy Clusters at 148 GHz in the 2008 Survey
• Evidence of Galaxy Cluster Motions with the Kinematic Sunyaev-Zel'dovich Effect
• The Atacama Cosmology Telescope: ACT-CL J0102-4915 "El Gordo," a Massive Merging Cluster at Redshift 0.87
• A Direct Multigrid Poisson Solver for Oct-Tree Adaptive Meshes
• Evidence for the kinematic Sunyaev-Zeľdovich effect with ACTPol and velocity reconstruction from BOSS
• Detection of the kinematic Sunyaev-Zel'dovich effect with DES Year 1 and SPT
• Investigating the velocity structure and X-ray observable properties of simulated galaxy clusters with PHOX
• On the Detectability of Turbulence and Bulk Flows in X-ray Clusters
• Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies. II. Inclusion of Peculiar Velocities
• The ASTRO-H X-ray Observatory
• A Measurement of the Kinetic Sunyaev-Zel'dovich Signal Toward MACS J0717.5+3745
• Weighing "El Gordo" with a Precision Scale: Hubble Space Telescope Weak-lensing Analysis of the Merging Galaxy Cluster ACT-CL J0102-4915 at z=0.87
• The Radio Relics and Halo of El Gordo, a Massive $z=0.870$ Cluster Merger
• Shock fronts, electron-ion equilibration and ICM transport processes in the merging cluster Abell 2146
• Mapping the kinetic Sunyaev-Zel'dovich effect toward MACS J0717.5+3745 with NIKA
• A Multi-wavelength Study of the Sunyaev-Zel'dovich Effect in the Triple-Merger Cluster MACS J0717.5+3745 with MUSTANG and Bolocam
• Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies. IV. Analytic fitting formula for the Numerical Results
• Planck intermediate results. XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect
• ALMA-SZ Detection of a Galaxy Cluster Merger Shock at Half the Age of the Universe
• Simulating the galaxy cluster "El Gordo" and identifying the merger configuration
• Peculiar Velocity Constraints from Five-Band SZ Effect Measurements Towards RX J1347.5-1145 with MUSIC and Bolocam from the CSO
• ASTRO-H White Paper - Clusters of Galaxies and Related Science
• The Atacama Cosmology Telescope: The LABOCA/ACT Survey of Clusters at All Redshifts
• Measuring Dark Matter Flows in Merging Clusters of Galaxies
• Imaging Simulations of the Sunyaev-Zel'dovich Effect for ALMA

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• A MUSE view of the massive merging galaxy cluster ACT-CL J0102-4915 (El Gordo) at z = 0.87: robust strong lensing model and data release
• A study of cool core resiliency and entropy mixing in simulations of galaxy cluster mergers
• Free-form lens model and mass estimation of the high redshift galaxy cluster ACT-CL J0102-4915, "El Gordo"
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