Δημοσιεύσεις

Project Acronym: PAS3
Title: Parametric Astrophysical Simulations 3
Affiliation: university of athens
Pi: Kanaris Tsiganos
Research Field: solar physics

Recurrent CME-like Eruptions in Emerging Flux Regions. II. Scaling of Energy and Collision of Successive Eruptions
by P. Syntelis, V. Archontis and K. Tsinganos
Abstract:
We present results of three-dimensional MHD simulations of recurrent eruptions in emerging flux regions. The initial numerical setup is the same as that in the work by Syntelis et al. Here, we perform a parametric study on the magnetic field strength (B0) of the emerging field. The kinetic energy of the produced ejective eruptions in the emerging flux region ranges from 1026 to 1028 erg, reaching up to the energies of small coronal mass ejections. The kinetic and magnetic energies of the eruptions scale linearly in a logarithmic plot. We find that the eruptions are triggered earlier for higher B0 and that B0 is not directly correlated to the frequency of occurrence of the eruptions. Using large numerical domains, we show the initial stage of the partial merging of two colliding erupting fields. The partial merging occurs partly by the reconnection between the field lines of the following and the leading eruption at the interface between them. We also find that tether-cutting reconnection of the field lines of the leading eruption underneath the following eruption magnetically links the two eruptions. Shocks develop inside the leading eruption during the collision.
Reference:
Recurrent CME-like Eruptions in Emerging Flux Regions. II. Scaling of Energy and Collision of Successive Eruptions (P. Syntelis, V. Archontis and K. Tsinganos), In The Astrophysical Journal, American Astronomical Society, volume 876, 2019.
Bibtex Entry:
@article{Syntelis_2019,
 doi = {10.3847/1538-4357/ab16d2},
 url = {https://doi.org/10.3847/1538-4357/ab16d2},
 year = {2019},
 bibyear = {2019},
 month = {may},
 publisher = {American Astronomical Society},
 volume = {876},
 number = {1},
 pages = {61},
 author = {P. Syntelis and V. Archontis and K. Tsinganos},
 title = {Recurrent {CME}-like Eruptions in Emerging Flux Regions. {II}. Scaling of Energy and Collision of Successive Eruptions},
 journal = {The Astrophysical Journal},
 abstract = {We present results of three-dimensional MHD simulations of recurrent eruptions in emerging flux regions. The initial numerical setup is the same as that in the work by Syntelis et al. Here, we perform a parametric study on the magnetic field strength (B0) of the emerging field. The kinetic energy of the produced ejective eruptions in the emerging flux region ranges from 1026 to 1028 erg, reaching up to the energies of small coronal mass ejections. The kinetic and magnetic energies of the eruptions scale linearly in a logarithmic plot. We find that the eruptions are triggered earlier for higher B0 and that B0 is not directly correlated to the frequency of occurrence of the eruptions. Using large numerical domains, we show the initial stage of the partial merging of two colliding erupting fields. The partial merging occurs partly by the reconnection between the field lines of the following and the leading eruption at the interface between them. We also find that tether-cutting reconnection of the field lines of the leading eruption underneath the following eruption magnetically links the two eruptions. Shocks develop inside the leading eruption during the collision.},
}