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dc.contributor.author
Cora, Sofia Alejandra
dc.date.available
2018-03-15T16:15:40Z
dc.date.issued
2006-06
dc.identifier.citation
Cora, Sofia Alejandra; Metal enrichment of the intracluster medium: a three-dimensional picture of chemical and dynamical properties; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 368; 4; 6-2006; 1540-1560
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/38891
dc.description.abstract
We develop a model for the metal enrichment of the intracluster medium (ICM) that combines a cosmological non-radiative hydrodynamical N-body/SPH (smoothed particle hydrodynamic) simulation of a cluster of galaxies, and a semi-analytic model of galaxy formation. The novel feature of our hybrid model is that the chemical properties of the diffuse gas in the underlying simulation are dynamically and consistently generated from stars in the galaxies. We follow the production of several chemical elements, provided by low- and intermediate-mass stars, core collapse and Type Ia supernovae. We analyse the spatial distribution of metals in the ICM, investigate the way in which the chemical enrichment proceeds and use iron emissivity as a tracer of gas motions. The similar abundance patterns developed by O and Fe indicate that both types of supernovae pollute the ICM in a similar fashion. Their radial abundance profiles are enhanced in the inner in the last Gyr because of the convergence of enriched gas clumps to the cluster centre; this increment cannot be explained by the metal ejection of cluster galaxies which is quite low at the present epoch. Our results support a scenario in which part of the central intracluster gas comes from gas clumps that, in the redshift range of z∼ 0.2 to 0.5, have been enriched to solar values and are at large distances from the cluster centre (from ∼1 to 6 h-1 Mpc) moving at very high velocities (from ∼1300 to 2500 km s-1). The turbulent gas motions within the cluster, originated in the inhomogeneous gas infall during the cluster assembly, are manifested in emission-weighted velocity maps as gradients that can be as large as over distances of a few hundred kpc. Gradients of this magnitude are also seen in velocity distributions along sightlines through the cluster centre. Doppler shifting and broadening suffered by the Fe K α 6.7-keV emission line along such sightlines could be used to probe these gas large-scale motions when they are produced within an area characterized by high iron line emissivity. © 2006 RAS.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Clusters
dc.subject
Evolution of Galaxies
dc.subject
Formation of Galaxies
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Metal enrichment of the intracluster medium: a three-dimensional picture of chemical and dynamical properties
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-06T15:11:25Z
dc.journal.volume
368
dc.journal.number
4
dc.journal.pagination
1540-1560
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Cora, Sofia Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1365-2966.2006.10271.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/368/4/1540/1152214
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