Identification

Title

The eruption of a prominence-carrying coronal flux rope: Forward synthesis of the magnetic field strength measurement by the COronal Solar Magnetism Observatory Large Coronagraph

Abstract

From a magnetohydrodynamic (MHD) simulation of the eruption of a prominence hosting coronal flux rope, we carry out forward synthesis of the circular polarization signal (Stokes V signal) of the Fe xiii emission line at 1074.7 nm produced by the MHD model as measured by the proposed COronal Solar Magnetism Observatory (COSMO) Large Coronagraph (LC) and infer the line-of-sight magnetic field, B LOS, above the limb. With an aperture of 150 cm, an integration time of 12 minutes, and a resolution of 12 arcsec, the LC can measure a significant B LOS with a sufficient signal-to-noise level, from the simulated flux rope viewed nearly along its axis with a peak axial field strength of about 10 G. The measured B LOS is found to relate well with the axial field strength of the flux rope for the height range of the prominence and can discern the increase with height of the magnetic field strength in that height range that is a definitive signature of the concave upturning dipped field supporting the prominence. The measurement can also detect an outward-moving B LOS due to the slow rise of the flux rope as it develops the kink instability, during the phase when its rise speed is still below about 41 km sâˆ’1 and up to a height of about 1.3 solar radii. These results suggest that the COSMO LC has great potential to provide quantitative information about the magnetic field structure of coronal mass ejection precursors (e.g., the prominence cavities) and their early evolution for the onset of eruption.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7xk8jfv

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2018-10-11T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

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name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact