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Popovas, Andrius; Nordlund, Åke; Szydlarski, Mikolaj; Kohutova, Petra; Hansteen, Viggo Haraldson & Noraz, Quentin Jean Francois Alain
[Show all 7 contributors for this article]
(2023).
Global MHD simulation of the solar convective region.
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Popovas, Andrius; Nordlund, Åke; Szydlarski, Mikolaj; Kohutova, Petra; Hansteen, Viggo Haraldson & Noraz, Quentin Jean Francois Alain
[Show all 7 contributors for this article]
(2023).
Update on global MHD simulations of the solar convective region.
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Hansteen, Viggo Haraldson & Spilde, Ingrid
(2022).
Norske forskere skal lage romfartøy for NASA.
[Newspaper].
forskning.no.
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Hansteen, Viggo Haraldson
(2021).
Heating the outer layers of the Sun: braiding, flux emergence, and episodic events.
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Hansteen, Viggo Haraldson
(2021).
Flux emergence in the Quiet Sun and its implications for chromospheric/coronal heating.
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Hansteen, Viggo Haraldson
(2021).
Numeriske Modeller av Sola .
Astronomi.
ISSN 0802-7587.
p. 24–24.
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Hansteen, Viggo
(2020).
IRIS: heating of the solar chromosphere, Ellerman Bombs and UV bursts.
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Hansteen, Viggo
(2019).
EBs and UV-bursts: reconnection at different heights in the solar atmosphere .
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Hansteen, Viggo
(2019).
Ellerman Bombs and UV bursts - observations.
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Hansteen, Viggo
(2019).
Ellerman Bombs and UV bursts, numerical simulations and IRIS observations.
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Hansteen, Viggo
(2019).
Ellerman Bombs and UV bursts, reconnection at different heights in the chromosphere?
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Hansteen, Viggo
(2019).
Ellerman Bombs and UV-bursts, a result of flux emergence.
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Hansteen, Viggo
(2019).
Ellerman bombs and UV bursts in the solar chromosphere.
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Hansteen, Viggo
(2019).
The FIP effect in the Chromosphere, Transition Region, Corona, and Solar Wind.
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Kohutova, Petra; Antolin, Patrick; Popovas, Andrius; Szydlarski, Mikolaj Marcin & Hansteen, Viggo
(2019).
3D radiative MHD simulations of coronal rain formation and evolution.
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Hansteen, Viggo
(2018).
Ellerman bombs and UV bursts: reconnection at different atmospheric layers?
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Hansteen, Viggo
(2018).
Ellerman bombs and UV bursts: reconnection at different atmospheric layers?
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Hansteen, Viggo
(2018).
Modeling chromospheric heating and dynamics: What do we understand?
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Hansteen, Viggo
(2018).
Chromospheric Dynamics and Heating Processes Ion-Neutral Effects in the Solar Chromosphere and Type II Spicules.
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Hansteen, Viggo
(2018).
Ion neutral effects in the solar chromosphere and type II spicules.
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Hansteen, Viggo
(2018).
The Heating of the Solar Chromosphere and Corona, What can "realistic" 3D Numerical Models teach us?
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Hansteen, Viggo
(2018).
Mass and energy flows between the solar chromosphere, transition region and corona.
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Mendes Domingos Pereira, Tiago; Carlsson, Mats; De Pontieu, Bart Walter & Hansteen, Viggo
(2015).
The Mg II lines as a diagnostic for heating in the lower chromosphere.
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Carlsson, Mats & Hansteen, Viggo
(2015).
Vær og uvær på sola.
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Hansteen, Viggo
(2014).
Heating of the upper chromosphere, transition region and corona.
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Hansteen, Viggo
(2014).
Energy transport in the transition region and lower solar corona.
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Hansteen, Viggo
(2014).
IRIS observations and 'realistic' 3D models of the solar chromosphere.
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Hansteen, Viggo
(2014).
IRIS Observations of transition region 'unresolved fine structure'.
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Hansteen, Viggo
(2014).
'Realistic' 3D simulations of a small flare resulting from flux emergence.
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Hansteen, Viggo
(2014).
Numerical modeling of the solar chromosphere and corona; what has been done? what should be done?
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Hansteen, Viggo
(2014).
Numerical modeling of the outer solar atmosphere, with some examples from IRIS observations.
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Hansteen, Viggo
(2014).
Simulating the transition region and corona: magnetic heating of the outer solar atmosphere.
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Hansteen, Viggo
(2014).
Numerical modeling of the chromosphere and corona; what has been done? what should be done?
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Kato, Yoshiaki; Steiner, Oskar; Hansteen, Viggo; Carlsson, Mats & Gudiksen, Boris Vilhelm
(2014).
Chromospheric and Corona Wave Generation in Flux Tubes.
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Kato, Yoshiaki; De Pontieu, Bart Walter; Martinez-Sykora, J.; Hansteen, Viggo; Pereira, Tiago Mendes Domingos & Leenaarts, Jorritt
[Show all 7 contributors for this article]
(2014).
Measuring energy flux of magneto-acoustic wave in the magnetic elements by using IRIS.
Show summary
NASA's Interface Region Imaging Spectrograph (IRIS) has opened a new window to explore the chromospheric/coronal waves that potentially energize the solar atmosphere. By using an imaging spectrograph covering the Si IV and Mg II h&k lines as well as a slit-jaw imager centered at Si IV and Mg II k onboard IRIS, we can determine the nature of propagating magneto-acoustic waves just below and in the transition region. In this study, we compute the vertically emergent intensity of the Si IV and Mg II h&k lines from a time series of snapshots of a magnetic element in a two-dimensional Radiative MHD simulation from the Bifrost code. We investigate the synthetic line profiles to detect the slow magneto-acoustic body wave (slow mode) which becomes a slow shock at the lower chromosphere in the magnetic element. We find that the Doppler shift of the line core gives the velocity amplitude of the longitudinal magneto-acoustic body wave. The contribution function of the line core indicates that the formation of Mg II h&k lines is associated with the propagating shocks and therefore the time evolution of the line core intensity represents the propagating shocks projected on the optical surface. We will report on measurement of the energy flux of slow modes in the magnetic elements by using IRIS observations.