Results 21 to 30 of about 2,470 (205)
The Astrophysical Journal, 2023 Differential emission measure (DEM) inversion methods use the brightness of a set of emission lines to infer the line-of-sight (LOS) distribution of the electron temperature ( T _e ) in the corona.
Benjamin Boe +2 more
doaj +1 more source
Comparing extrapolations of the coronal magnetic field structure at 2.5 solar radii with multi-viewpoint coronagraphic observations [PDF]
, 2019 The magnetic field shapes the structure of the solar corona but we still know little about the interrelationships between the coronal magnetic field configurations and the resulting quasi-stationary structures observed in coronagraphic images (as ...
Abbo, L. +21 more
core +4 more sources
Observational Kinematic Characteristics of Blobs in Solar Coronal Helmet and Pseudo Streamers
The Astrophysical Journal Letters, 2021 Abstract We examine two helmet and two pseudo streamers (HSs and PSs) observed on 2018 and 2019. The HSs (PSs) have dark coronal cavities and stretched loop structures (twin coronal cavities and narrow plasma sheet) at their bases, which are well observed in K-Coronagraph (K-Cor).
Jae-Ok Lee +6 more
openaire +1 more source
Lateral Confinement and the Remarkably Self-similar Nature of Coronal Pseudostreamer Mass Ejections
The Astrophysical Journal, 2023 Coronal mass ejections (CMEs) that originate from pseudostreamers, which separate coronal holes of the same magnetic polarity, are characterized by a narrow (∼5°–30°), fan-shaped appearance in white-light coronagraph images.
Y.-M. Wang, P. Hess
doaj +1 more source
Solar cycle variation of the temperature structure within the cores of coronal streamers [PDF]
Astronomy & Astrophysics, 2002 We use the Coronal Diagnostic Spectrometer onboard the Solar and Heliospheric Observatory (SOHO) to analyze conditions in coronal streamer structures observed close to solar minimum (1996 July 8) and near maximum (1999 August 5). We measured the intensities of emission lines from Fe IX–XV ions and found the most intense emission to be from Fe XI at ...
Foley, C.R. +3 more
openaire +2 more sources
Recent insights on CME deflections at low heights
Frontiers in Astronomy and Space Sciences, 2023 It has been shown that the magnetic structures surrounding coronal mass ejection (CME) events play a crucial role in their development and evolution along the first few solar radii.
M. Cécere +4 more
doaj +1 more source
The Astrophysical Journal, 2023 Type II solar bursts are radio signatures of shock waves in the solar corona driven by solar flares or coronal mass ejections (CMEs). Therefore, these bursts present complex spectral morphologies in solar dynamic spectra.
Artem Koval +6 more
doaj +1 more source
Interacting coronae of two T Tauri stars: first observational evidence for solar-like helmet streamers [PDF]
, 2007 Context {The young binary system V773 Tau A exhibits a persistent radio flaring activity that gradually increases from a level of a few mJy at apoastron to more than 100 mJy at periastron.
A. Boden +32 more
core +2 more sources
PROBING THE THERMODYNAMICS AND KINEMATICS OF SOLAR CORONAL STREAMERS
The Astrophysical Journal, 2011 We present the results of a resistive magnetohydrodynamic (MHD) model of an equatorially confined streamer belt using observational constraints for the heating and acceleration of the solar wind. To initiate the 2.5 dimensional MHD calculations, we used the Potential Field Source Surface model of the coronal magnetic field configuration with the ...
V. Airapetian +3 more
openaire +1 more source
Are There Different Populations of Flux Ropes in the Solar Wind? [PDF]
, 2014 Flux ropes are twisted magnetic structures, which can be detected by in situ measurements in the solar wind. However, different properties of detected flux ropes suggest different types of flux-rope population. As such, are there different populations of
Dasso, Sergio +2 more
core +3 more sources