Possible depletion of metals into dust grains in the core of the Centaurus cluster of galaxies

Abstract

We present azimuthally averaged metal abundance profiles from a full, comprehensive, and conservative re-analysis of the deep ($\sim$800 ks total net exposure) \textit{Chandra}/ACIS-S observation of the Centaurus cluster core (NGC\,4696). After carefully checking various sources of systematic uncertainties, including the choice of the spectral deprojection method, assumptions about the temperature structure of the gas, and uncertainties in the continuum modeling, we confirm the existence of a central drop in the abundances of the `reactive' elements Fe, Si, S, Mg, and Ca, within $r\lesssim$10 kpc. The same drops are also found when analyzing the \textit{XMM-Newton}/EPIC data ($\sim$150 ks). Adopting our most conservative approach, we find that, unlike the central drops seen for Fe, Si, S, Mg and Ca, the abundance of the `nonreactive' element Ar is fully consistent with showing no central drop. This is further confirmed by the significant ($>3\sigma$) central radial increase of the Ar/Fe ratio. Our results corroborate the previously proposed `dust depletion scenario' , in which central metal abundance drops are explained by the deposition of a significant fraction of centrally cooled reactive metals into dust grains present in the central regions of the Centaurus cluster. This is also supported by the previous findings that the extent of the metal abundance drops in NGC\,4696 broadly coincides with the infrared dust emission.

Accepted for publication in A&A; 12 pages, 5 figures, 2 tables

References in corpus (12)

• XMM-Newton and Chandra Cross Calibration Using HIFLUGCS Galaxy Clusters: Systematic Temperature Differences and Cosmological Impact
• Chemical enrichment in the cluster of galaxies Hydra A
• Temperature and abundance profiles of hot gas in galaxy groups - I. Results and statistical analysis
• Hot Atmospheres, Cold Gas, AGN Feedback and the Evolution of Early Type Galaxies: a Topical Perspective
• A uniform metallicity in the outskirts of massive, nearby galaxy clusters
• Direct X-ray Spectral Deprojection of Galaxy Clusters
• X-MAS2: Study Systematics on the ICM Metallicity Measurements
• Enrichment in the Centaurus cluster of galaxies
• Abundance and temperature distributions in the hot intra-cluster gas of Abell 4059
• A volume-limited sample of X-ray galaxy groups and clusters: III. Central abundance drops
• Resonance scattering, absorption and off-centre abundance peaks in clusters of galaxies
• Uplift, feedback and buoyancy: radio lobe dynamics in NGC 4472

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