Magnetohydrodynamic Simulations of Spicular Jet Propagation Applied to Lower Solar Atmosphere Model

Mackenzie Dover, Fionnlagh, Sharma, Rahul and Erdélyi, Robertus (2021) Magnetohydrodynamic Simulations of Spicular Jet Propagation Applied to Lower Solar Atmosphere Model. The Astrophysical Journal, 913 (1). p. 19. ISSN 0004-637X

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Official URL: https://doi.org/10.3847/1538-4357/abefd1

Abstract

We report a series of numerical experiments for the propagation of a momentum pulse representing a chromospheric jet, simulated using an idealized magnetohydrodynamic model. The jet in a stratified lower solar atmosphere is subjected to a varied initial driver (amplitude, period) and magnetic field conditions to examine the parameter influence over jet morphology and kinematics. The simulated jet captured key observed spicule characteristics including maximum heights, field-aligned mass motions/trajectories, and cross-sectional width deformations. Next, the jet features also show a prominent bright, bulb-like apex, similar to reported observed chromospheric jets, formed due to the higher density of plasma and/or waves. Furthermore, the simulations highlight the presence of not yet observed internal crisscross/knots substructures generated by shock waves reflected within the jet structure. Therefore we suggest verifying these predicted fine-scale structures in highly localized lower solar atmospheric jets, e.g., in spicules or fibrils by high-resolution observations, offered by the Daniel K. Inoyue Solar Telescope or otherwise.

Item Type: Article
Additional Information: Funding information: F.M. and R.E. acknowledge the support of Science and Technology Facilities Council UK (grant No. ST/M000826/1) and The Royal Society (UK). F.M is grateful for the STFC studentship and acknowledges the useful insights provided by M. Allcock. R.S is grateful for support from the UKRI Future Leader Fellowship (RiPSAW—MR/T019891/1). Part of the computations used Sheffield University HPC cluster ShARC. Numerical results used the open source software MPIAMRVAC, mainly developed at K.U. Leuven. Visualizations of the data are done using Python, an open source and community-developed programming language.
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 07 Jun 2021 12:38
Last Modified: 31 Jul 2021 11:05
URI: http://nrl.northumbria.ac.uk/id/eprint/46364

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