Resonance scattering, absorption and off-centre abundance peaks in clusters of galaxies
arXiv:astro-ph/0604575 · doi:10.1111/j.1365-2966.2006.10497.x
Abstract
A possible explanation for the central abundance dips found from spatially-resolved X-ray spectroscopy of several groups and clusters of galaxies is resonance scattering. A number of the prominent iron emission lines are resonance lines. We construct a unique spectral model which takes account of resonance scattering for several thousand resonance lines, projection effects, photoelectric absorption, and allows direct spectral fitting. We apply our model to Chandra observations of two clusters with pronounced central abundance dips, Centaurus and Abell 2199. The results show that the effect of resonance scattering on emission from the centre of the cluster can be as much as 30 per cent for the Fe-K resonance lines, and 10 per cent for several Fe-L lines, if turbulence is low. The change to the metallicities obtained by fitting low resolution CCD spectra is at most 10 per cent. Accounting for resonance scattering does not remove the central dip. Allowing for internal absorption within the Centaurus significantly improves the quality of the fits, indicating the presence of absorbing material within the inner 40 kpc of NGC 4696.
arXiv comment11 pages, accepted by MNRAS
References in corpus (26)
- Collisional Plasma Models with APEC/APED: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions
- A very deep Chandra observation of the Perseus cluster: shocks, ripples and conduction
- XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
- The relationship between the optical Halpha filaments and the X-ray emission in the core of the Perseus cluster
- Metallicity Gradients in X-ray Clusters of Galaxies
- Chandra Observations of NGC 4636 - An Elliptical Galaxy in Turmoil
- Chandra observations of Abell 2199
- On the soft X-ray spectrum of cooling flows
- XMM-Newton Observations of the Perseus Cluster II: Evidence for Gas Motions in the Core
- Mapping small-scale temperature and abundance structures in the core of the Perseus cluster
- Spatially-resolved X-ray spectroscopy of the core of the Centaurus cluster
- Chandra temperature and metallicity maps of the Perseus cluster core
- Iron Gradients in Cooling Flow Galaxies and Groups
- A deep Chandra observation of the Centaurus cluster: bubbles, filaments and edges
- Non-thermal X-rays, a high abundance ridge and fossil bubbles in the core of the Perseus cluster of galaxies
- Modeling Charge Transfer Inefficiency in the Chandra Advanced CCD Imaging Spectrometer
- The extended H-alpha emitting filaments surrounding NGC4696, the central galaxy of the Centaurus cluster
- Simulating CCDs for the Chandra Advanced CCD Imaging Spectrometer
- Evidence for Merging in the Centaurus Cluster
- Some effects of small-scale metallicity variations in cooling flows
- Polarization of resonance X-ray lines from clusters of galaxies
- Detection of Bulk Motions in the ICM of the Centaurus Cluster
- Ni abundance in the core of the Perseus Cluster: an answer to the significance of resonant scattering
- Circulation Flows: Cooling Flows with Bubble Return
- ASCA Temperature Maps of Three Clusters of Galaxies Abell 1060, AWM7, and the Centaurus Cluster
- Spatial Diffusion of X-ray Emission Lines in the M87 Cooling Flow; Evidence for Absorption
Cited by in corpus (27)
- The eROSITA Final Equatorial-Depth Survey (eFEDS): Catalog of galaxy clusters and groups
- Radial metal abundance profiles in the intra-cluster medium of cool-core galaxy clusters, groups, and ellipticals
- A very deep Chandra view of metals, sloshing and feedback in the Centaurus cluster of galaxies
- Constraining Gas Motions in the Intra-Cluster Medium
- Enrichment of the hot intracluster medium: observations
- Enrichment in the Centaurus cluster of galaxies
- Measurements of resonant scattering in the Perseus cluster core with Hitomi SXS
- Searching for the missing iron in the core of the Centaurus cluster
- A volume-limited sample of X-ray galaxy groups and clusters: III. Central abundance drops
- Resonant scattering in the Perseus Cluster: spectral model for constraining gas motions with Astro-H
- The metal content of the hot atmospheres of galaxy groups
- A multi-wavelength view of cooling vs. AGN heating in the X-ray luminous cool-core of Abell 3581
- Resonant scattering of X-ray emission lines in the hot intergalactic medium
- The imprints of AGN feedback within a supermassive black hole's sphere of influence
- Sound waves in the intracluster medium of the Centaurus cluster
- A Deep Chandra Observation of the AGN Outburst and Merger in Hickson Compact Group 62
- Uplift, feedback and buoyancy: radio lobe dynamics in NGC 4472
- Possible depletion of metals into dust grains in the core of the Centaurus cluster of galaxies
- On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters
- Resonant scattering of the OVII X-ray emission line in the circumgalactic medium of TNG50 galaxies
- Detection of optical coronal emission from 10^6 K gas in the core of the Centaurus cluster
- X-ray spectroscopy of galaxy clusters: beyond the CIE modeling
- Modeling Photoionized Turbulent Material in the Circumgalactic Medium II: Effect of Turbulence within a Stratified Medium
- Disentangling Resonant Scattering and Gas Motions in Galaxy Cluster Emission Line Profiles
- The velocity structure of the intracluster medium during a major merger: simulated microcalorimeter observations
- Suppressed cooling and turbulent heating in the core of X-ray luminous clusters RXCJ1504.1-0248 and Abell 1664
- The clus model in SPEX: projection and resonant scattering effects on the iron abundance and temperature profiles of galaxy clusters