Limits on thermal conduction in galaxy clusters

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dc.creatorMedvedev, Mikhail V.
dc.creatorMelott, Adrian L.
dc.creatorMiller, Chris
dc.creatorHorner, Donald
dc.date2003-03-14
dc.date.accessioned2026-07-07T02:07:55Z
dc.date.available2026-07-07T02:07:55Z
dc.descriptionWe have calculated lower limits for the global effective thermal conductivity in a sample of 165 Abell clusters. We assumed that cluster X-ray luminosity is compensated by a conductive heat flux which we then compare with an upper limit to the temperature gradient inferred from the cluster temperature and radius. This gives a lower limit to the thermal conductivity and therefore to the relative suppression from the Spitzer conductivity, kappa_{Sp}. Not a single cluster requires super-Spitzer values of thermal conduction to balance the observed X-ray luminosity. The suppression coefficient f=kappa/kappa_{Sp} is clustered in a range 10^{-2} < f < 0.4. A weak dependence of $f$ versus $z$ is observed over $ 0 < z <0.41$. Possible biases and/or selection effects are discussed.
dc.description7 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/astro-ph/0303310
dc.identifierhttp://arxiv.org/abs/astro-ph/0303310
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5859
dc.subjectAstrophysics
dc.titleLimits on thermal conduction in galaxy clusters
dc.typetext

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