Magnetohydrodynamic Simulations of Spicular Jet Propagation Applied to Lower Solar Atmosphere Model. II. Case Studies with Tilted Jets

Mackenzie Dover, Fionnlagh, Sharma, Rahul and Erdélyi, Robertus (2022) Magnetohydrodynamic Simulations of Spicular Jet Propagation Applied to Lower Solar Atmosphere Model. II. Case Studies with Tilted Jets. The Astrophysical Journal, 929 (1). p. 88. ISSN 0004-637X

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Abstract: We report on numerical simulations of a propagating momentum pulse, representing an inclined jet structure in a stratified lower solar atmosphere model. Here, the numerical jets were generated via injection of a momentum pulse misaligned with the radial magnetic field, which resulted in a collimated structure that mimicked the observed inclined jet features in the chromosphere. The influence of inclination angle was examined for a variety of initial driver conditions (amplitude, period) and magnetic field magnitudes to identify their potential role in determining the morphological and dynamical characteristics of chromospheric jets. The numerical jets in our computational domain were consistent with the observed magnitudes of apex height and cross-sectional width for average inclination of chromospheric features. Furthermore, with an increasing misalignment between the momentum pulse and ambient magnetic field, the simulated structures showed a drop in the maximum apex height and length, while an increase in cross-sectional width magnitudes. Our numerical experiments also revealed the development of a pulse-like transverse motions in jets along with high density edges/nodes in the direction of jet displacement. It is postulated that dynamic kink instability might be responsible for the observed kinematic behavior of the inclined jet structures in the solar chromosphere.

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. R.S. is grateful for support from the UKRI Future Leader Fellowship (RiPSAWMR/T019891/1). Part of the computations used the Sheffield University HPC cluster ShARC. Numerical results were obtained using the open source software MPI-AMRVAC, mainly developed at K.U. Leuven. Visualizations of the data were done using Python, an open source and community-developed programming language.
Uncontrolled Keywords: Magnetohydrodynamical simulations, Solar chromosphere, Solar spicules, the sun, solar physics
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 22 Apr 2022 10:34
Last Modified: 29 Apr 2022 13:16

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