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We present azimuthally averaged metal abundance profiles from a full,comprehensive, and conservative re-analysis of the deep ($\sim$800 ks total netexposure) \textit{Chandra}/ACIS-S observation of the Centaurus cluster core(NGC\,4696). After carefully checking various sources of systematicuncertainties, including the choice of the spectral deprojection method,assumptions about the temperature structure of the gas, and uncertainties inthe continuum modeling, we confirm the existence of a central drop in theabundances of the `reactive' elements Fe, Si, S, Mg, and Ca, within$r\lesssim$10 kpc. The same drops are also found when analyzing the\textit{XMM-Newton}/EPIC data ($\sim$150 ks). Adopting our most conservativeapproach, we find that, unlike the central drops seen for Fe, Si, S, Mg and Ca,the abundance of the `nonreactive' element Ar is fully consistent with showingno central drop. This is further confirmed by the significant ($>3\sigma$)central radial increase of the Ar/Fe ratio. Our results corroborate thepreviously proposed `dust depletion scenario' , in which central metalabundance drops are explained by the deposition of a significant fraction ofcentrally cooled reactive metals into dust grains present in the centralregions of the Centaurus cluster. This is also supported by the previousfindings that the extent of the metal abundance drops in NGC\,4696 broadlycoincides with the infrared dust emission.

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