Polymeric jets throw light on the origin and nature of the forest of solar spicules

Sahel, D and Chatterjee, P and Murthy, OVSN and Korsós, BM and Liu, J and Nelson, JC and Erdélyi, R (2022) Polymeric jets throw light on the origin and nature of the forest of solar spicules. In: Nature Physics, 18 (5). pp. 595-600.

PDF nat_phy_18-5_595-600_2022.pdf - Published Version Restricted to Registered users only Download (20MB) | Request a copy

Abstract

Spicules are plasma jets that are observed in the dynamic interface region between the visible solar surface and the hot corona. At any given time, it is estimated that about 3 million spicules are present on the Sun. We find an intriguing parallel between the simulated spicular forest in a solar-like atmosphere and the numerous jets of polymeric fluids when both are subjected to harmonic forcing. In a radiative magnetohydrodynamic numerical simulation with sub-surface convection, solar global surface oscillations are excited similarly to those harmonic vibrations. The jets thus produced match remarkably well with the forests of spicules detected in observations of the Sun. Taken together, the numerical simulations of the Sun and the laboratory fluid dynamics experiments provide insights into the mechanism underlying the ubiquity of jets. The non-linear focusing of quasi-periodic waves in anisotropic media of magnetized plasma as well as polymeric fluids under gravity is sufficient to generate a forest of jets. © 2022, The Author(s), under exclusive licence to Springer Nature Limited.

Item Type:	Journal Article
Publication:	Nature Physics
Publisher:	Nature Research
Additional Information:	The Copyright for this article belongs to the Nature Research.
Keywords:	Anisotropic media; Anisotropy; Forestry; Magnetohydrodynamics; Magnetoplasma; Plasma jets; Dynamic-interface; Harmonic forcing; Harmonic vibration; Interface regions; Polymeric fluid; Solar spicules; Solar surfaces; Sub-surfaces; Surface convection; Surface oscillations; Numerical models
Department/Centre:	Division of Physical & Mathematical Sciences > Joint Astronomy Programme Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Jun 2022 05:09
Last Modified:	21 Jun 2022 05:09
URI:	https://eprints.iisc.ac.in/id/eprint/73661

Actions (login required)

View Item