Cosmic-void observations reconciled with primordial magnetogenesis

Autor: David N. Hosking, Alexander A. Schekochihin

Publikováno v: Nature Communications, Vol 14, Iss 1, Pp 1-10 (2023)

Abstract It has been suggested that the weak magnetic field hosted by the intergalactic medium in cosmic voids could be a relic from the early Universe. However, accepted models of turbulent magnetohydrodynamic decay predict that the present-day stre

Externí odkaz: https://doaj.org/article/f515bf5fbeaa4d16852057e48888efd6

Tearing Instability and Current-Sheet Disruption in the Turbulent Dynamo

Autor: Alisa K. Galishnikova, Matthew W. Kunz, Alexander A. Schekochihin

Publikováno v: Physical Review X, Vol 12, Iss 4, p 041027 (2022)

Turbulence in a conducting plasma can amplify seed magnetic fields in what is known as the turbulent, or small-scale, dynamo. The associated growth rate and emergent magnetic-field geometry depend sensitively on the material properties of the plasma,

Externí odkaz: https://doaj.org/article/11cf52f23534488fa15daa133cdd66d7

Indirect measurements of gas velocities in galaxy clusters: effects of ellipticity and cluster dynamic state

Autor: Irina Zhuravleva, Mandy C Chen, Eugene Churazov, Alexander A Schekochihin, Congyao Zhang, Daisuke Nagai

Publikováno v: Monthly Notices of the Royal Astronomical Society. 520:5157-5172

While awaiting direct velocity measurement of gas motions in the hot intracluster medium, we rely on indirect probes, including gas perturbations in galaxy clusters. Using a sample of $\sim 80$ clusters in different dynamic states from Omega500 cosmo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b212ea7765f1b4cf420f6320a58cda58
https://doi.org/10.1093/mnras/stad470

Nonmonotonic pair potentials in the interaction of like-charged objects in solution

Autor: Ali Behjatian, Rowan Walker-Gibbons, Alexander A. Schekochihin, Madhavi Krishnan

We consider the long-standing like-charge attraction problem, wherein under certain conditions, similarly charged spheres suspended in aqueous electrolyte have been observed to display a minimum in their interaction potential, contrary to the intuiti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::123ec3d4822fe10369c041bbd1767dcc
https://doi.org/10.1021/acs.langmuir.1c02801

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

Publikováno v: 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⟩

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 temp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff0c9fd379ef50b4a8b06c2f794e60f9
http://arxiv.org/abs/2105.08461