Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha)

Details Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha) Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha)

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasj...46..205h&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 46, no. 2, p. 205-216

Astronomy and Astrophysics

Astronomy

70

Electron Density (Concentration), H Alpha Line, Imaging Techniques, Magnetic Field Configurations, Radio Astronomy, Solar Corona, Solar Prominences, Solar Radio Emission, Solar Temperature, Solar X-Rays, X Ray Astronomy, X Ray Imagery, Goes Satellites, Radio Interferometers, Satellite-Borne Instruments, Skylab Program, Solar Maximum Mission, Spectroheliographs, X Ray Telescopes

Scientific paper

A prominence eruption followed by a coronal brightening was simultaneously observed in radio (17 GHz), soft X-rays, and H(alpha) on 1992 July 30-31. The observations were performed by newly developed high-performance instruments: the Nobeyama Radioheliograph, the SXT on the Yohkoh satellite, the Flare Monitoring Telescope of the Hida Observatory, and some other H(alpha) telescopes. This event gives us a much more detailed picture of this type of phenomena than previously observed. The erupting prominence, which occurred in a quiet region and was observed in H(alpha) and radio, ascended with a velocity of about 100 km/sec. The general structure of the erupting prominence seen at 17 GHz is very similar to that at H(alpha). While the prominence expanded rapidly, the total radio flux of the erupting prominence did not change very much. Since a prominence consists of fine threads, this fact means that each thread did not expand while the prominence expanded. Consequently, the surface filling factor of the prominence must have decreased during the eruption. The high-resolution pictures of a clear coronal arcade structure were taken in soft X-rays and radio after the prominence eruption; the physical parameters of the arcade were derived from these pictures. The mean temperature was 3.5 x 106 K in the early phase, and decreased to 2.6 x 106 K within seven hours. The total emission measure reached a maximum value of(1.6 x 1048)/cu cm after three hours from the beginning of the arcade brightening, when the electron density at the ridge of the arcade is estimated as(2.4 x 109)/cu cm. The temporal and spatial relationship between the erupting prominence and the coronal arcade is shown. It gives an observational restriction to the magnetic field configuration of the models of such events.

Affiliated with

Also associated with

No associations

Rating

Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous observations of a prominence eruption followed by a coronal arcade formation in radio, soft X-rays, and H(alpha) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1261827