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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/angeo-2019-67
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-67
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 08 May 2019

Regular paper | 08 May 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

On modelling the kinematics and evolutionary properties of pressure pulse driven impulsive solar jets

Balveer Singh, Kushagra Sharma, and Abhishek K. Srivastava Balveer Singh et al.
  • Department of Physics, Indian Institute of Technology (BHU), Varanasi-221005, India

Abstract. In this paper, we describe the kinematical and evolutionary properties of the impulsive solar jets using numerical simulation by Godunov-type PLUTO code. These type of chromospheric jets are originated by the pressure pulse, which mimics the after effects of the localized heating in the lower solar atmosphere. These jets may responsible for the transporting of mass and energy in the localized upper atmosphere (i.e., corona). The automated detection of height-time profiles for the jets originated by imposing the different pressure pulses exhibit the asymmetric near parabolic profiles. This infers that the upward motion of the jet occurs under the influence of pressure perturbation. However, its downward motion is not only governed by the gravitational free fall but also due to the complex plasma motions near its base due to the counter propagating pulses. Maximum height and life-time of the jets w.r.t. strength of the pressure pulse show a linear increasing trend. This suggests that if the extent of the heating and thus pressure perturbations will be higher then more longer chromospheric jets can be triggered from the same location in the chromosphere. Although, we present the kinematics and evolutionary properties of the a isolated jets, but usually such jet triggering sites with pressure perturbations exhibits the formation of the multiple jets along with the significant brightening at their base. In conclusions, our model mimics the properties and evolution of the impulsive jets (e.g., macrospicules, network jets, isolated repeated cool jets, confined and small surges etc).

Balveer Singh et al.
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Latest update: 19 May 2019
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Short summary
Solar jets driven from the heating or pressure pulse at the footpoints in the photosphere transfer energy and mass in to the corona. These jets energize the coronal part of the atmosphere with the collimated plasma similar to the fluid filled in a pipe. Understanding the physical drivers of such jets is of great significance to study the plasma in confined magnetic fields. The modelled jets in our paper studies the evolution of chromospheric plasma and support many existing observations.
Solar jets driven from the heating or pressure pulse at the footpoints in the photosphere...
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