Strong suppression of heat conduction in a laboratory replica of galaxy-cluster turbulent plasmas
| Autor: | Jena Meinecke, Petros Tzeferacos, James S. Ross, Archie F. A. Bott, Scott Feister, Hye-Sook Park, Anthony R. Bell, Roger Blandford, Richard L. Berger, Robert Bingham, Alexis Casner, Laura E. Chen, John Foster, Dustin H. Froula, Clement Goyon, Daniel Kalantar, Michel Koenig, Brandon Lahmann, Chikang Li, Yingchao Lu, Charlotte A. J. Palmer, Richard D. Petrasso, Hannah Poole, Bruce Remington, Brian Reville, Adam Reyes, Alexandra Rigby, Dongsu Ryu, George Swadling, Alex Zylstra, Francesco Miniati, Subir Sarkar, Alexander A. Schekochihin, Donald Q. Lamb, Gianluca Gregori |
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| Přispěvatelé: | Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Plasma Physics (physics.plasm-ph)
High Energy Astrophysical Phenomena (astro-ph.HE) Multidisciplinary FOS: Physical sciences [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - High Energy Astrophysical Phenomena QC [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] Physics - Plasma Physics |
| Zdroj: | Meinecke, J, Tzeferacos, P, Ross, J S, Bott, A F A, Feister, S, Park, H-S, Bell, A R, Blandford, R, Berger, R L, Bingham, R, Casner, A, Chen, L E, Foster, J, Froula, D H, Goyon, C, Kalantar, D, Koenig, M, Lahmann, B, Li, C, Lu, Y, Palmer, C A J, Petrasso, R D, Poole, H, Remington, B, Reville, B, Reyes, A, Rigby, A, Ryu, D, Swadling, G, Zylstra, A, Miniati, F, Sarkar, S, Schekochihin, A A, Lamb, D Q & Gregori, G 2022, ' Strong suppression of heat conduction in a laboratory replica of galaxy-cluster turbulent plasmas ', Science Advances, vol. 8, no. 10 . https://doi.org/10.1126/sciadv.abj6799 Sci.Adv. Sci.Adv., 2022, 8 (10), pp.abj6799. ⟨10.1126/sciadv.abj6799⟩ |
| ISSN: | 2375-2548 |
| Popis: | Galaxy clusters are filled with hot, diffuse X-ray emitting plasma, with a stochastically tangled magnetic field whose energy is close to equipartition with the energy of the turbulent motions \cite{zweibel1997, Vacca}. In the cluster cores, the temperatures remain anomalously high compared to what might be expected considering that the radiative cooling time is short relative to the Hubble time \cite{cowie1977,fabian1994}. While feedback from the central active galactic nuclei (AGN) \cite{fabian2012,birzan2012,churazov2000} is believed to provide most of the heating, there has been a long debate as to whether conduction of heat from the bulk to the core can help the core to reach the observed temperatures \cite{narayan2001,ruszkowski2002,kunz2011}, given the presence of tangled magnetic fields. Interestingly, evidence of very sharp temperature gradients in structures like cold fronts implies a high degree of suppression of thermal conduction \cite{markevitch2007}. To address the problem of thermal conduction in a magnetized and turbulent plasma, we have created a replica of such a system in a laser laboratory experiment. Our data show a reduction of local heat transport by two orders of magnitude or more, leading to strong temperature variations on small spatial scales, as is seen in cluster plasmas \cite{markevitch2003}. |
| Databáze: | OpenAIRE |
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