Observations of Thermal Plasma in a Solar Limb Flare

Details Observations of Thermal Plasma in a Solar Limb Flare Observations of Thermal Plasma in a Solar Limb Flare

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.7004m&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #70.04; Bulletin of the American Astronomical Society, Vol. 28, p.938

Other

Scientific paper

While the earliest phases of a solar flare are characterized mainly by nonthermal emissions, such as hard X-rays, the remainder of the event manifests itself primarily as thermal emissions at wavelengths ranging from X-rays through optical. This radiation comes from flare plasma covering a wide range of temperatures. Yohkoh Soft X-Ray Telescope (SXT) observations show that in soft X-rays this emission often comes from complex emitting structures, with temperatures that vary from feature to feature. These temperatures, however, are based on filter ratios and are thus difficult to interpret for a multithermal plasma. Yohkoh Bragg Crystal Spectrometer (BCS) observations also provide a temperature diagnostic for the soft X-ray emitting flare plasma. These temperatures often differ from those obtained using filter ratios, again demonstrating that flare plasma is multithermal. We report on observations of a limb flare observed on 1991 October 21 in which the temperatures measured using emission lines of CaXIX and FeXXV agreed, suggesting that this flare contained substantial amounts of isothermal plasma. We use SXT and BCS data from this flare to verify SXT filter ratio temperatures and to determine relative ion fractions of FeXXII, FeXXIII, FeXIV, and FeXXV for comparison with ionization balance calculations. This work was supported by the NASA Office of Space Science and the Naval Research Laboratory.

Affiliated with

Also associated with

No associations

Rating

Observations of Thermal Plasma in a Solar Limb Flare 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 Observations of Thermal Plasma in a Solar Limb Flare, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of Thermal Plasma in a Solar Limb Flare will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1355183