The formation of G-band bright points. I: Standard LTE modelling
Abstract
Assuming LTE, we synthesise solar G band spectra from the semiempirical flux-tube model of Briand Solanki (1995). The results agree with observed G-band bright-point contrasts within the uncertainty set by the amount of scattered light. We find that it is the weakening of spectral lines within the flux tube that makes the bright-point contrast in the G band exceed the continuum contrast. We also synthesise flux-tube spectra assuming LTE for the full wavelength range from UV to IR, and identify other promising passbands for flux-tube observations.
Keywords
Cite
@article{arxiv.astro-ph/0010390,
title = {The formation of G-band bright points. I: Standard LTE modelling},
author = {D. Kiselman and R. J. Rutten and B. Plez},
journal= {arXiv preprint arXiv:astro-ph/0010390},
year = {2007}
}
Comments
4 pages, 3 figures, to appear in "Recent Insights into the Physics of the Sun and Heliosphere - Highlights from SOHO and Other Space Missions", ASP Conf. Ser. 200, 2001, Eds. P.Brekke, B. Fleck, J.B. Gurman