Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Gudiksen, Boris V."'
Context. Simulating solar flares, which involve large-scale dynamics and small-scale magnetic reconnection, poses significant computational challenges. Aims. This study aims to develop an explicit Particle-In-Cell (PIC) solver within the DISPATCH fra
Externí odkaz:
http://arxiv.org/abs/2409.02493
Publikováno v:
A&A 617, A50 (2018)
One candidate-model for heating the solar corona is magnetic reconnection that embodies Ohmic dissipation of current sheets. When numerous small-scaled magnetic reconnection occur, then it is possible to heat the corona. Due to the limitations of cur
Externí odkaz:
http://arxiv.org/abs/1806.04495
Autor:
Martínez-Sykora, Juan, De Pontieu, Bart, Carlsson, Mats, Hansteen, Viggo H., Nóbrega-Siverio, Daniel, Gudiksen, Boris V.
We investigate the effects of interactions between ions and neutrals on the chromosphere and overlying corona using 2.5D radiative MHD simulations with the Bifrost code. We have extended the code capabilities implementing ion-neutral interaction effe
Externí odkaz:
http://arxiv.org/abs/1708.06781
Publikováno v:
A&A 603, A83 (2017)
The solar coronal heating problem is an open question since 1939. One proposed model for the transport and release of mechanical energy generated in the sub-phorospheric layers and photosphere is the nanoflare model that incorporates Ohmic heating wh
Externí odkaz:
http://arxiv.org/abs/1703.02808
The properties of non-statistical equilibrium ionization of silicon and oxygen ions are analyzed in this work. We focus on four solar targets (quiet sun, coronal hole, plage, quiescent active region, AR, and flaring AR) as observed with the Interface
Externí odkaz:
http://arxiv.org/abs/1512.00865
Publikováno v:
A&A 585, A4 (2016)
Context. The solar chromosphere is the interface between the solar surface and the solar corona. Modelling of this region is difficult because it represents the transition from optically thick to thin radiation escape, from gas-pressure domination to
Externí odkaz:
http://arxiv.org/abs/1510.07581
The structure and dynamics of the outer solar atmosphere are reviewed with emphasis on the role played by the magnetic field. Contemporary observations that focus on high resolution imaging over a range of temperatures, as well as UV, EUV and hard X-
Externí odkaz:
http://arxiv.org/abs/1412.7378
Autor:
Gudiksen, Boris V.
The heating of the solar corona has been investigated during four of decades and several mechanisms able to produce heating have been proposed. It has until now not been possible to produce quantitative estimates that would establish any of these hea
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-32
Autor:
Gudiksen, Boris V., Carlsson, Mats, Hansteen, Viggo H., Hayek, Wolfgang, Leenaarts, Jorrit, Martínez-Sykora, Juan
Context: Numerical simulations of stellar convection and photospheres have been developed to the point where detailed shapes of observed spectral lines can be explained. Stellar atmospheres are very complex, and very different physical regimes are pr
Externí odkaz:
http://arxiv.org/abs/1105.6306
aims: We aim to provide an estimate of the minimum temperature of the quiet solar chromosphere. methods: We perform a 2D radiation-MHD simulation spanning the upper convection zone to the lower corona. The simulation includes non-LTE radiative transf
Externí odkaz:
http://arxiv.org/abs/1104.5081