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Chemical enrichment of the ICM within the virgo cluster - I. Radial profiles

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Gatuzz,  Efraín
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Sanders,  J. S.
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Dennerl,  K.
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Liu,  A.
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Gatuzz, E., Sanders, J. S., Dennerl, K., Liu, A., Fabian, A. C., Pinto, C., et al. (2023). Chemical enrichment of the ICM within the virgo cluster - I. Radial profiles. Monthly Notices of the Royal Astronomical Society, 520(3), 4793-4800. doi:10.1093/mnras/stad447.


Cite as: https://hdl.handle.net/21.11116/0000-000D-CA83-B
Abstract
We present a detailed analysis of the elemental abundances distribution of the Virgo cluster using XMM–Newton observations. We included in the analysis a new EPIC-pn energy scale calibration which allow us to measure velocities with uncertainties down to Δv ∼150 km s−1. We investigate the radial distribution of O, Ne, Mg, Si, Ar, S, Ca, Ni, and Fe. We found that the best-fitting model is close to a single-temperature component for distances >80 kpc and the cooler gas is more metal rich. Discontinuities in temperature are found around ∼30 and ∼90 kpc, which correspond to the radius of the cold fronts. We modelled elemental X/Fe ratio profiles with a linear combination of SNIa and SNcc models. We found a flat radial distribution of SNIa ratio over the total cluster enrichment, which supports an early ICM enrichment scenario, with most of the metals present being produced prior to clustering.