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Electrons in the solar corona. Pt. 3. Coronal streamers analysis from balloon-borne coronagraph

Journal Article:

Abstract

During a balloon flight in France on September 13, 1971, at altitude 32 000 m, the solar corona was cinematographed from 2 to 5 Rsub(sun) during 5 hr, with an externally occulted coronagraph. Motions in coronal features, when they occur, exhibit deformations of structures with velocities not exceeding a few 10 km s/sup -1/; several streamers were often involved simultaneously; these variations are compatible with magnetic changes or sudden reorganizations of lines of forces. Intensity and polarization measurements give the electron density with height in the quiet corona above the equator. Electron density gradient for one of the streamers gives a temperature of 1.6 x 10/sup 6/ K and comparisons with the on-board Apollo 16 coronal observation of 31 July, 1971 are compatible with the extension of this temperature up to 25 Rsub(sun). Three-dimensional structures and localizations of the streamers are deduced from combined photometry, polarimetry and ground-based K coronametry. Three of the four coronal streamers analysed have their axis bent with height towards the direction of the solar rotation, as if the upper corona has a rotation slightly faster than the chromosphere.
Authors:
Dollfus, A; Mouradian, Z [1] 
  1. Observatoire de Paris, Section de Meudon, 92 (France)
Publication Date:
Mar 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-12-626183; EDB-82-023809
Resource Relation:
Journal Name: Sol. Phys.; (Netherlands); Journal Volume: 70:1
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; SOLAR CORONA; ELECTRON DENSITY; BALLOONS; CHROMOSPHERE; ELECTRONS; EXPERIMENTAL DATA; VELOCITY; AIRSHIPS; ATMOSPHERES; DATA; ELEMENTARY PARTICLES; FERMIONS; INFORMATION; LEPTONS; NUMERICAL DATA; SOLAR ATMOSPHERE; 640104* - Astrophysics & Cosmology- Solar Phenomena
OSTI ID:
5973413
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: SLPHA
Submitting Site:
INIS
Size:
Pages: 3-24
Announcement Date:

Journal Article:

Citation Formats

Dollfus, A, and Mouradian, Z. Electrons in the solar corona. Pt. 3. Coronal streamers analysis from balloon-borne coronagraph. Netherlands: N. p., 1981. Web.
Dollfus, A, & Mouradian, Z. Electrons in the solar corona. Pt. 3. Coronal streamers analysis from balloon-borne coronagraph. Netherlands.
Dollfus, A, and Mouradian, Z. 1981. "Electrons in the solar corona. Pt. 3. Coronal streamers analysis from balloon-borne coronagraph." Netherlands.
@misc{etde_5973413,
title = {Electrons in the solar corona. Pt. 3. Coronal streamers analysis from balloon-borne coronagraph}
author = {Dollfus, A, and Mouradian, Z}
abstractNote = {During a balloon flight in France on September 13, 1971, at altitude 32 000 m, the solar corona was cinematographed from 2 to 5 Rsub(sun) during 5 hr, with an externally occulted coronagraph. Motions in coronal features, when they occur, exhibit deformations of structures with velocities not exceeding a few 10 km s/sup -1/; several streamers were often involved simultaneously; these variations are compatible with magnetic changes or sudden reorganizations of lines of forces. Intensity and polarization measurements give the electron density with height in the quiet corona above the equator. Electron density gradient for one of the streamers gives a temperature of 1.6 x 10/sup 6/ K and comparisons with the on-board Apollo 16 coronal observation of 31 July, 1971 are compatible with the extension of this temperature up to 25 Rsub(sun). Three-dimensional structures and localizations of the streamers are deduced from combined photometry, polarimetry and ground-based K coronametry. Three of the four coronal streamers analysed have their axis bent with height towards the direction of the solar rotation, as if the upper corona has a rotation slightly faster than the chromosphere.}
journal = {Sol. Phys.; (Netherlands)}
volume = {70:1}
journal type = {AC}
place = {Netherlands}
year = {1981}
month = {Mar}
}