Semiempirical Models of Solar Magnetic Structures

The flux-gap between bright and dark solar magnetic structures

The upper size limit of solar small-scale magnetic flux concentrations (“G-band bright points”, BP) is reconsidered from speckle-reconstructed images taken at the 1-m SST on La Palma. The size-histogram shows a sharp drop towards 250 km diameter, variation of the noise filter threshold diminishes that value due to segmentation of the elongated structures. A further artificial segmentation of st...

Semiempirical bound on the 37Cl solar neutrino experiment.

The Kamiokande measurement of energetic 8 B neutrinos from the sun is used to set a lower bound on the contribution of the same neutrinos to the signal in the 37 Cl experiment. Implications for 7 Be neutrinos are discussed. Energetic 8 B neutrinos from the sun have been detected in the Kamiokande experiment [1] at about one half the rate predicted by the Standard Solar Model (SSM) [2]. These sa...

Models for magnetic heating of the solar atmosphere

Sustaining the hot solar corona requires an energy flux of up to about 10erg cm−2s−1 whose source must be the photospheric motions below. However, the precise way this energy is transferred and damped still remains an open question. Here a review of recent advances in theoretical models for coronal heating, in the light of the fundamental observational results of the last decade, will be

Reconstruction of Solar Coronal Linear Force-Free Magnetic Field

Development of Semiempirical Models for Proton Transfer Reactions in Water.

This letter presents a method for the parametrization of semiempirical models for proton transfer reactions in water clusters. Two new models are developed: AM1-W, which is a reparameterization of the classic AM1 model, and AM1PG-W, which is a modified AM1-like model including a pairwise correction to the core repulsion function. Both models show good performance on hydrogen-bonding energies an...