Zobrazeno 1 - 10
of 54
pro vyhledávání: '"A. Keppens"'
To expand on recent work, we introduce collisional terms in the analysis of the warm ion-electron, two-fluid equations for a homogeneous plasma at rest. Consequently, the plasma is now described by six variables: the magnetisation, the ratio of masse
Externí odkaz:
http://arxiv.org/abs/2405.11565
Publikováno v:
A&A 688, A64 (2024)
The formation of the MFRs in the pre-flare stage, and how this leads to coronal rain in a post-eruption magnetic loop is not fully understood. We explore the formation, and eruption of MFRs, followed by the appearance of coronal rain in the post-flar
Externí odkaz:
http://arxiv.org/abs/2405.10688
Turbulent states are ubiquitous in plasmas and the understanding of turbulence is fundamental in modern astrophysics. Numerical simulations, which are the state-of-the-art approach to the study of turbulence, require substantial computing resources.
Externí odkaz:
http://arxiv.org/abs/2405.09587
Accretion disks are highly unstable to magnetic instabilities driven by shear flow, where classically, the axisymmetric, weak-field Magneto-Rotational Instability (MRI) has received much attention through local WKB approximations. In contrast, discre
Externí odkaz:
http://arxiv.org/abs/2404.06925
In this paper we study the role of radiative cooling in a two-fluid model consisting of coupled neutrals and charged particles. We first analyze the linearized two-fluid equations where we include radiative losses in the energy equation for the charg
Externí odkaz:
http://arxiv.org/abs/2403.11900
A spectroscopic investigation of thermal instability for cylindrical equilibria with background flow
Autor:
Hermans, Joris, Keppens, Rony
Publikováno v:
A&A 686, A180 (2024)
Flows are omnipresent and govern the dynamics of plasma. Solar tornadoes are a class of apparently rotating prominences, that might be formed by thermal instability. In spectroscopic studies on thermal instability background flow is commonly neglecte
Externí odkaz:
http://arxiv.org/abs/2403.00082
Autor:
De Jonghe, Jordi, Keppens, Rony
We investigate the influence of background shear flow on linear resistive tearing instabilities with Joule heating for two compressible plasma slab configurations: a Harris current sheet and a force-free, shearing magnetic field that varies its direc
Externí odkaz:
http://arxiv.org/abs/2402.12005
The aim of this paper is to present the implementation of two new CME models in the space weather forecasting tool, EUHFORIA. We introduce the two toroidal CME models analytically, along with their numerical implementation in EUHFORIA. One model is b
Externí odkaz:
http://arxiv.org/abs/2310.17239
Publikováno v:
A&A 678, A132 (2023)
Combined tearing-thermal evolution plays an important role in the disruption of current sheets, and formation of cool condensations within the solar atmosphere. However, this has received limited attention to date. We numerically explore a combined t
Externí odkaz:
http://arxiv.org/abs/2308.10210
Autor:
Braileanu, B. Popescu, Keppens, R.
Publikováno v:
A&A 678, A66 (2023)
The density decreases exponentially with height in the solar gravitationally stratified atmosphere, therefore the collisional coupling between the ionized plasma and the neutrals also decreases. Here, we investigate the role of collisions between ion
Externí odkaz:
http://arxiv.org/abs/2307.05736