The H-alpha spectral counterparts of solar hard X-ray microflares

Details The H-alpha spectral counterparts of solar hard X-ray microflares The H-alpha spectral counterparts of solar hard X-ray microflares

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321..586c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. 586-592.

Astronomy and Astrophysics

Astrophysics

30

H Alpha Line, Solar Flares, Solar Spectra, Solar X-Rays, Balloon Flight, Electron Energy, Red Shift, Solar Instruments, Time Series Analysis

Scientific paper

X-ray observations have revealed energetically significant numbers of very small hard X-ray bursts, termed microflares by Lin et al. The authors have simultaneously observed the Hα counterparts of serveral of these microflares. It is found that microflares occur in regions that are also productive of larger flares, suggesting that they may be components of the larger flare event. All but the weakest miroflares show pronounced impulsive-phase red asymmetry in Hα. Their energetics, interpreted using the thick-target nonthermal model of electron transport, implies that these events are substantially underresolved at the authors' spatial resolution and have a true area of 1015- 1016cm-2.

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