114 citations · 867 across the 22 of their papers we have counts for
22 papers
Observations of a prominence eruption and loop contraction
Pooja Devi, Pascal Démoulin, Ramesh Chandra +3
Context. Prominence eruptions provide key observations to understand the launch of coronal mass ejections as their cold plasma traces a part of the unstable magnetic configuration.…
Additivity of relative magnetic helicity in finite volumes
Gherardo Valori, Pascal Démoulin, Etienne Pariat +3
Relative magnetic helicity is conserved by magneto-hydrodynamic evolution even in the presence of moderate resistivity. For that reason, it is often invoked as the most relevant co…
Comparing the Properties of ICME-Induced Forbush Decreases at Earth and Mars
Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber +9
Forbush decreases (FDs), which are short-term drops in the flux of galactic cosmic rays, are caused by the shielding from strong and/or turbulent magnetic structures in the solar w…
Magnetic twist profile inside magnetic clouds derived with a superposed epoch analysis
V. Lanabere, S. Dasso, P. Démoulin +3
Magnetic clouds (MCs) are large-scale interplanetary transient structures in the heliosphere that travel from the Sun into the interplanetary medium. The internal magnetic field li…
Modelling the Effect of Mass-Draining on Prominence Eruptions
Jack M. Jenkins, Matthew Hopwood, Pascal Démoulin +4
Quiescent solar prominences are observed to exist within the solar atmosphere for up to several solar rotations. Their eruption is commonly preceded by a slow increase in height th…
Generic magnetic field intensity profiles of interplanetary coronal mass ejections at Mercury, Venus and Earth from superposed epoch analyses
Miho Janvier, Reka Winslow, Simon Good +8
We study interplanetary coronal mass ejections (ICMEs) measured by probes at different heliocentric distances (0.3-1AU) to investigate the propagation of ICMEs in the inner heliosp…
Exploring the biases of a new method based on minimum variance for interplanetary magnetic clouds
Pascal Démoulin, Sergio Dasso, Miho Janvier
Magnetic clouds (MCs) are twisted magnetic structures ejected from the Sun and probed by in situ instruments. They are typically modeled as flux ropes (FRs). The determination of t…
Studying the transfer of magnetic helicity in solar active regions with the connectivity-based helicity flux density method
K. Dalmasse, E. Pariat, G. Valori +2
In the solar corona, magnetic helicity slowly and continuously accumulates in response to plasma flows tangential to the photosphere and magnetic flux emergence through it. Analyzi…
Evolution of the Magnetic Field Distribution of Active Regions
Sally Dacie, Pascal Démoulin, Lidia van Driel-Gesztelyi +5
Aims. Although the temporal evolution of active regions (ARs) is relatively well understood, the processes involved continue to be the subject of investigation. We study how the ma…
Magnetic Flux and Helicity of Magnetic Clouds
P. Demoulin, M. Janvier, S. Dasso
Magnetic clouds (MCs) are formed by flux ropes (FRs) launched from the Sun as part of coronal mass ejections (CMEs). They carry away an important amount of magnetic flux and helici…
The origin of net electric currents in solar active regions
K. Dalmasse, G. Aulanier, P. Démoulin +3
There is a recurring question in solar physics about whether or not electric currents are neutralized in active regions (ARs). This question was recently revisited using three-dime…
Parallel Evolution of Quasi-separatrix Layers and Active Region Upflows
C. H. Mandrini, D. Baker, P. Démoulin +6
Persistent plasma upflows were observed with Hinode's EUV Imaging Spectrometer (EIS) at the edges of active region (AR) 10978 as it crossed the solar disk. We analyze the evolution…
Testing magnetic helicity conservation in a solar-like active event
E. Pariat, G. Valori, P. Démoulin +1
Magnetic helicity has the remarkable property of being a conserved quantity of ideal magnetohydrodynamics (MHD). Therefore, it could be used as an effective tracer of the magnetic…
The Counter-kink Rotation of a Non-Hale Active Region
M. C. López Fuentes, P. Démoulin, C. H. Mandrini +1
We describe the long-term evolution of a bipolar non-Hale active region which was observed from October, 1995, to January, 1996. Along these four solar rotations the sunspots and s…
In Situ Properties of Small and Large Flux Ropes in the Solar Wind
M. Janvier, P. Demoulin, S. Dasso
Two populations of twisted magnetic field tubes, or flux ropes (hereafter, FRs), are detected by in situ measurements in the solar wind. While small FRs are crossed by the observin…
The Evolution of Writhe in Kink-Unstable Flux Ropes and Erupting Filaments
Tibor Torok, Bernhard Kliem, Mitchell A. Berger +3
The helical kink instability of a twisted magnetic flux tube has been suggested as a trigger mechanism for solar filament eruptions and coronal mass ejections (CMEs). In order to i…
First observational application of a connectivity--based helicity flux density
K. Dalmasse, E. Pariat, G. Valori +2
Measuring the magnetic helicity distribution in the solar corona can help in understanding the trigger of solar eruptive events because magnetic helicity is believed to play a key…
Photospheric Injection of Magnetic Helicity: Connectivity--based Flux Density Method
K. Dalmasse, E. Pariat, P. Démoulin +1
Magnetic helicity quantifies how globally sheared and/or twisted is the magnetic field in a volume. This quantity is believed to play a key role in solar activity due to its conser…
Recurrent Coronal Jets Induced by Repetitively Accumulated Electric Currents
Y. Guo, P. Démoulin, B. Schmieder +3
Three extreme-ultraviolet (EUV) jets recurred in about one hour on 2010 September 17 in the following magnetic polarity of active region 11106. The EUV jets were observed by the At…
Global and local expansion of magnetic clouds in the inner heliosphere
Adriana Maria Gulisano, Pascal Demoulin, Sergio Dasso +2
Observations of magnetic clouds (MCs) are consistent with the presence of flux ropes detected in the solar wind (SW) a few days after their expulsion from the Sun as coronal mass e…
Interplanetary magnetic structures guiding solar relativistic particles
Sophie Masson, Pascal Démoulin, Sergio Dasso +1
Relating in situ measurements of relativistic solar particles to their parent activity in the corona requires understanding the magnetic structures that guide them from their accel…
On Asymmetry of Magnetic Helicity in Emerging Active Regions: High Resolution Observations
Lirong Tian, Pascal Démoulin, David Alexander +1
We employ the DAVE (differential affine velocity estimator, Schuck 2005; 2006) tracking technique on a time series of MDI/1m high spatial resolution line- of-sight magnetograms to…