The effect of a non-Maxwellian distribution on excitation and ionization of hydrogen in solar flares

Details The effect of a non-Maxwellian distribution on excitation and ionization of hydrogen in solar flares The effect of a non-Maxwellian distribution on excitation and ionization of hydrogen in solar flares

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261..633p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 2, p. 633-639.

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Atomic Excitations, Hydrogen, Ionization, Solar Flares, Atomic Collisions, Boltzmann Transport Equation, Chromosphere, Computational Astrophysics

Scientific paper

We study analytically the effects of the nonthermal collisional excitation and ionization of hydrogen by electron beams on a flaring chromosphere. Owing to strong departures from the Maxwellian distribution, nonthermal effects lead to an increase of the energy deposited in excited and ionized states, which can explain the enhancement of the chromospheric Paschen emission as white-light flares. The results are compared to the semi-empirical results of Aboudarham & Henoux (1986).

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