A shock near the virial radius of the Perseus Cluster
arXiv:2107.01663 · doi:10.1051/0004-6361/202140673
Abstract
Previous X-ray studies of the Perseus Cluster, consisting of 85 Suzaku pointings along eight azimuthal directions, revealed a particularly steep decrease in the projected temperature profile near the virial radius (~r200) towards the northwest (NW). To further explore this shock candidate, another 4 Suzaku observations on the NW edge of the Perseus Cluster have been obtained. These deeper data were designed to provide the best possible control of systematic uncertainties in the spectral analysis. Using the combined Suzaku observations, we have carefully investigated this interesting region by analyzing the spectra of various annuli and extracting projected thermodynamic profiles. We find that the projected temperature profile shows a break near r200, indicating a shock with M = 1.9+-0.3. Corresponding discontinuities are also found in the projected emission measure and the density profiles at the same location. This evidence of a shock front so far away from the cluster center is unprecedented, and may provide a first insight into the properties of large-scale virial shocks which shape the process of galaxy cluster growth.
arXiv comment12 pages, 6 figures, accepted by A&A
References in corpus (45)
- The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
- Calibration of X-ray absorption in our Galaxy
- Updated Atomic Data and Calculations for X-ray Spectroscopy
- Optimal binning of X-ray spectra and response matrix design
- Diffuse Radio Emission from Galaxy Clusters
- Monte-Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
- Cosmological Shock Waves and Their Role in the Large Scale Structure of the Universe
- XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
- A Census of Baryons in Galaxy Clusters and Groups
- Reproducibility of Non-X-ray Background for the X-ray Imaging Spectrometer aboard Suzaku
- Galaxy Cluster Baryon Fractions Revisited
- Baryons at the Edge of the X-ray Brightest Galaxy Cluster
- XMM-Newton Observation of Solar Wind Charge Exchange Emission
- X-Ray Evidence for Multiphase Hot Gas with Nearly Solar Fe Abundances in the Brightest Groups of Galaxies
- Energy Spectra of the Soft X-ray Diffuse Emission in Fourteen Fields Observed with Suzaku
- Gas Clumping in the Outskirts of Lambda-CDM Clusters
- A uniform metal distribution in the intergalactic medium of the Perseus cluster of galaxies
- A wide Chandra view of the core of the Perseus cluster
- Chandra Observations of the "Dark" Moon and Geocoronal Solar-Wind Charge Transfer
- Systematic X-ray Analysis of Radio Relic Clusters with SUZAKU
- Outskirts of Galaxy Clusters
- Suzaku Observations of Abell 1795: Cluster Emission to R_200
- X-ray Temperature and Mass Measurements to the Virial Radius of Abell 1413 with Suzaku
- The Physics of Galaxy Cluster Outskirts
- X-ray observations of the galaxy cluster PKS 0745-191: To the virial radius, and beyond
- The XMM Cluster Outskirts Project (X-COP)
- Azimuthally Resolved X-Ray Spectroscopy to the Edge of the Perseus Cluster
- A uniform metallicity in the outskirts of massive, nearby galaxy clusters
- Large-scale inhomogeneities of the intracluster medium: improving mass estimates using the observed azimuthal scatter
- Large-scale Motions in the Perseus Galaxy Cluster
- The XMM Cluster Outskirts Project (X-COP): Thermodynamic properties of the Intracluster Medium out to in Abell 2319
- Thermodynamics of the Coma Cluster Outskirts
- Galaxy Clusters at the Edge: Temperature, Entropy, and Gas Dynamics at the Virial Radius
- Accretion Shocks in Clusters of Galaxies and their SZ Signature from Cosmological Simulations
- A shock front at the radio relic of Abell 2744
- Baryon Content of Massive Galaxy Clusters (0.57 < z < 1.33)
- The XMM Cluster Outskirts Project (X-COP): Physical conditions to the virial radius of Abell 2142
- The nature and energetics of AGN-driven perturbations in the hot gas in the Perseus Cluster
- Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic
- Suzaku X-Ray Observations of the Accreting NGC 4839 Group of Galaxies and the Radio Relic in the Coma Cluster
- Predicting Merger-Induced Gas Motions in Lambda-CDM Galaxy Clusters
- A2163: Merger events in the hottest Abell galaxy cluster II. Subcluster accretion with galaxy-gas separation
- Voyage through the Hidden Physics of the Cosmic Web
- Collision of Merger and Accretion Shocks: Formation of Mpc-scale Contact Discontinuity in the Perseus Cluster
- Search for WHIM around A2744 using Suzaku
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- Investigating the outskirts of Abell 133 with Suzaku and Chandra observations
- Perseus cluster in its X-ray entirety with SRG/eROSITA. Merger and Radio-Uroboroses
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