E-Print Archive

There are 4133 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Three-dimensional Density Structure of a Solar Coronal Streamer Observed by SOHO/LASCO and STEREO/COR2 in Quadrature View all abstracts by submitter

Bieke Decraemer   Submitted: 2019-08-20 08:30

Helmet streamers are a prominent manifestation of magnetic structures with current sheets in the solar corona. These large-scale structures are regions with high plasma density, overlying active regions and lament channels. We investigate the three-dimensional (3D) structure of a coronal streamer, observed simultaneously by white-light coronagraphs from two vantage points near quadrature (SOHO/LASCO and STEREO/COR2). We design a forward model based on plausible assumptions about the 3D streamer structure taken from physical models (a plasma slab centered around a current sheet). The streamer stalk is approximated by a plasma slab, with electron density that is characterized by three separate functions describing the radial, transverse and face-on pro les respectively. For the rst time, we simultaneously t the observational data from SOHO and STEREO using a multivariate minimization algorithm. The streamer plasma sheet contains a number of brighter and darker ray-like structures with the density contrast up to about a factor 3 between them. The densities derived using polarized and unpolarized data are similar. We demonstrate that our model corresponds well to the observations.

Authors: Bieke Decraemer, Andrei N. Zhukov, and Tom Van Doorsselaere
Projects: SoHO-LASCO,STEREO

Publication Status: Accepted for publication in The Astrophysical Journal
Last Modified: 2019-08-21 14:20
Go to main E-Print page  Reversed dynamo at small scales and large magnetic Prandtl number  Modelling Mg II During Solar Flares, I: Partial Frequency Redistribution, Opacity, and Coronal Irradiation  Edit Entry  Download Preprint  Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares
Measurement of the Height of the Chromospheric Network Emission from Solar Dynamics Observatory Images
Submillimeter radiation as the thermal component of the Neupert Effect
A Very Narrow RHESSI X-ray Flare on 25 September 2011
First Detection of Plasmoids from Breakout Reconnection on the Sun
A New Type of Jets in a Polar Limb of Solar Coronal Hole
First imaging spectroscopy observations of solar drift pair bursts
Round-Trip Slipping Magnetic Reconnection Observed in a Fan-Spine Jet
A global two-scale helicity proxy from pi-ambiguous solar magnetic fields
Multi-layered Kelvin-Helmholtz Instability in the Solar Corona
Magnetohydrodynamic Seismology of Quiet Solar Active Regions
Testing magnetohydrostatic extrapolation with radiative MHD simulation of a solar flare
Real-time solar image classification: assessing spectral, pixel-based approaches
Modelling Mg II During Solar Flares. II. Non-equilibrium Effects
Calibration of the Instrumental Crosstalk for the Near-IR Imaging Spectropolarimeter at the NST
On the Source Position and Duration of a Solar Type III Radio Burst Observed by LOFAR
Determination of transport coefficients by coronal seismology of flare-induced slow-mode waves: Numerical parametric study of 1D loop model
The Eruption of Outer Spine-like Loops Leading to a Double-stage Circular-ribbon Flare
Non-Stationary Fast-Driven Self-Organized Criticality in Solar Flares
Global Energetics of Solar Flares. IX. Refined Magnetic Modeling

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2003 Solar Physics Group - Montana State University