Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409l..69v&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 409, no. 2, p. L69-L72.
Astronomy and Astrophysics
Astronomy
29
Gamma Ray Astronomy, Gamma Rays, Solar Flares, Solar Limb, Solar Maximum Mission, Bremsstrahlung, Goes Satellites, Nuclear Capture, Satellite-Borne Instruments
Scientific paper
We present gamma-ray measurements of a large solar flare that occurred beyond the western solar limb on September 29, 1989. The gamma-ray spectrum shows a neutron capture line which is much stronger than predicted by limb-darkening curves that fit the measurements for flares on the visible hemisphere. We show that this strong neutron capture line can be explained if, in addition to the compact impulsive phase component that normally dominates the total fluence, there is a spatially extended component. For the September 29, 1989 flare we find that such a spatially extended region must subtend more than about 30 deg on the solar surface. We suggest that the extended component could be powered by particles that diffuse from a compact impulsive region or by particles that diffuse into the lower solar atmosphere from a large-scale acceleration site.
Forrest David J.
Vestrand Thomas W.
No associations
LandOfFree
Evidence for a spatially extended component of gamma rays from solar flares 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 Evidence for a spatially extended component of gamma rays from solar flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for a spatially extended component of gamma rays from solar flares will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1735203