Astrophysical magnetic fields and nonlinear dynamo theory

A Brandenburg, K Subramanian - Physics Reports, 2005 - Elsevier
The current understanding of astrophysical magnetic fields is reviewed, focusing on their
generation and maintenance by turbulence. In the astrophysical context this generation is …

Flare-productive active regions

S Toriumi, H Wang - Living Reviews in Solar Physics, 2019 - Springer
Strong solar flares and coronal mass ejections, here defined not only as the bursts of
electromagnetic radiation but as the entire process in which magnetic energy is released …

[HTML][HTML] Flux emergence (theory)

M Cheung, H Isobe - Living Reviews in Solar Physics, 2014 - Springer
Magnetic flux emergence from the solar convection zone into the overlying atmosphere is
the driver of a diverse range of phenomena associated with solar activity. In this article, we …

On the magnetic flux budget in low-corona magnetic reconnection and interplanetary coronal mass ejections

J Qiu, Q Hu, TA Howard… - The Astrophysical …, 2007 - iopscience.iop.org
We present the first quantitative comparison between the total magnetic reconnection flux in
the low corona in the wake of coronal mass ejections (CMEs) and the magnetic flux in …

A new model-independent method to compute magnetic helicity in magnetic clouds

S Dasso, CH Mandrini, P Démoulin… - Astronomy & …, 2006 - aanda.org
Context. Magnetic clouds are transient magnetic structures expulsed from the Sun that travel
toward the external heliosphere carrying a significant amount of magnetic flux and helicity …

Magnetic helicity, tilt, and twist

AA Pevtsov, MA Berger, A Nindos, AA Norton… - Space Science …, 2014 - Springer
Since its introduction to astro-and solar physics, the concept of helicity has proven to be
useful in providing critical insights into physics of various processes from astrophysical …

Photospheric flux density of magnetic helicity

E Pariat, P Démoulin, MA Berger - Astronomy & Astrophysics, 2005 - aanda.org
Several recent studies have developed the measurement of magnetic helicity flux from the
time evolution of photospheric magnetograms. The total flux is computed by summing the …

Magnetic energy and helicity in two emerging active regions in the Sun

Y Liu, PW Schuck - The Astrophysical Journal, 2012 - iopscience.iop.org
The magnetic energy and relative magnetic helicity in two emerging solar active regions, AR
11072 and AR 11158, are studied. They are computed by integrating over time the energy …

Long-duration magnetic clouds: a comparison of analyses using torus-and cylinder-shaped flux rope models

K Marubashi, RP Lepping - Annales Geophysicae, 2007 - angeo.copernicus.org
We identified 17 magnetic clouds (MCs) with durations longer than 30 h, surveying the solar
wind data obtained by the WIND and ACE spacecraft during 10 years from 1995 through …

Eruption of magnetic flux ropes during flux emergence

V Archontis, T Török - Astronomy & Astrophysics, 2008 - aanda.org
Aims. We investigate the formation of flux ropes in a flux emergence region and their rise
into the outer atmosphere of the Sun. Methods. We perform 3D numerical experiments by …