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Session 1 - Chromosphere, Corona, Flares.
Display session, Friday, June 27
Ballroom B, Chair: Charles Kankelborg

[1.68] A Search for Quiescent Solar Gamma-Ray Emission

J. M. Ryan, M. L. McConnell, G. Rank (UNH), V. Schönfelder (MPE), K. Bennett (SSD/ESA), A. MacKinnon (Univ. of Glasgow)

Until now, solar \gamma-ray emissions have only been detected during solar flares. However, there are several scenarios (e.g., microflares) in which \gamma-ray emission might be detectable when there is no significant solar activity. These processes would be related to the general issue of small-scale energy releases and the general problem of solar coronal heating. Such emissions might also be observed to vary as a function of solar cycle. We have embarked on a systematic search for quiet-time gamma-ray emissions using the unique imaging capabilities of the COMPTEL experiment on the Compton Gamma-Ray Observatory. The Sun has been within the large (\sim1 steradian) FoV of COMPTEL on several ocassions since its launch in April 1991. We are using these data to search for both time-integrated and time-resolved gamma-ray emission, concentrating on those periods when there was negligible solar activity. Our analysis involves a search for both broad-band and narrow line emissions. Here we report on the latest results from this effort, with particular emphasis on the implications for low energy proton acceleration.


The author(s) of this abstract have provided an email address for comments about the abstract: jryan@comptel.sr.unh.edu

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