| Name: | Chandranathan Anandavijayan |
| Affiliation: | International Center for Theoretical Sciences, Tata Institute of Fundamental Research, Bengaluru, IN |
| Conference ID : | ASI2024_375 |
| Title : | Quasi-two-dimensional nature of 3D magnetically dominated decaying turbulence. |
| Authors : | Dwivedi, S. 1 , Anandavijayan, C. 2, Bhat, P. 2 |
| Authors Affiliation: | 1. University of Wisconsin-Madison, Madison, USA
2. International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560089, India |
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | Observations have indicated the presence of primordial coherent magnetic fields within cosmic voids [1]. These magnetic fields can be potentially explained by magnetically dominated decaying turbulence in the early universe. Magnetohydrodynamic (MHD) decaying turbulence exhibits inverse energy transfer in both cases of helical and non-helical magnetic fields. This inverse energy transfer has been shown to occur likely due to magnetic reconnection [2,3]. Intriguingly, the scaling laws for this decay are similar in both 2.5D and 3D simulations. This quasi-two-dimensionalization of the 3D system may be due to local anisotropy via local mean magnetic fields. In our work, we study the morphology of reconnecting magnetic fields using Minkowski Functionals to understand the quasi-2D nature of the system. Our preliminary results indicate that the current has sheet-like morphology, a characteristic of 2D magnetic reconnection [3]. Our calculations of the planarity and filamentarity of the reconnecting magnetic structures shed further light on the anisotropy in the system.
References:
1. Subramanian, K. (2016) ‘The origin, evolution and signatures of primordial magnetic fields’, Reports on Progress in Physics, 79(7), p. 076901.
2. Bhat, P., Zhou, M. and Loureiro, N.F. (2021) ``Inverse energy transfer in decaying, three-dimensional, non-helical magnetic turbulence due to magnetic reconnection”, Monthly Notices of the Royal Astronomical Society, 501(2), pp. 3074–3087.
3. Dwivedi, S., Anandavijayan, C. and Bhat, P. (2023) ``Quasi-two-dimensional nature of magnetically dominated decaying turbulence’’, (In preparation). |
