Coronal jets in an inclined coronal magnetic field : a parametric 3D MHD study

¹ LESIA-Observatoire de Paris, CNRS, UPMC Univ., Paris 06, Univ. Paris-Diderot, France
² Space Weather Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
³ Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC 20375, USA

Abstract

X-ray solar coronal jets are short–duration, fast, well collimated plasma brightenings occurring in the solar corona. To explain and understand the processes driving the jets, one must be able to model an explosive release of free energy. Magnetic reconnection is believed to play a key role in the generation of these energetic bursting events. The model of jets that we have been developing is based on a magnetic field constructed by embedding a vertical magnetic dipole in a uniform open magnetic field. In this study, we investigate the influence of the inclination of the open field on the properties of the jet using numerical simulations. We will show that the inclination of the open field is of critical importance for the properties of the jet such as the energy released. We conclude that the characteristics of the open field at the time of observations are a central criterion that must be taken into account and reported on in observational studies.