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The Formation of G-band Bright Points I: Standard LTE Modelling

Published online by Cambridge University Press:  13 May 2016

D. Kiselman ,
R. J. Rutten  and
B. Plez
D. Kiselman
Affiliation:
The Swedish Royal Academy of Sciences, Stockholm Observatory, SE-133 36 Saltsjöbaden, Sweden
R. J. Rutten
Affiliation:
Sterrekundig Instituut, Postbus 80 000, NL-3508 TA Utrecht, The Netherlands
B. Plez
Affiliation:
GRAAL, Université de Montpellier II, FR-34095 Montpellier Cedex 5, France

Abstract

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Assuming LTE, we investigate the formation of the G band in the semiempirical flux-tube model of Briand & Solanki (1995). Preliminary results agree with observations of G-band bright-point contrast, even though the observed contrast depends sensitively on the amount of scattered light. It is the weakening of spectral lines in the flux tube that makes the bright-point contrast greater in the G band than in ordinary continuum. We also present LTE synthetic spectra for the full wavelength range from UV to IR. This serves to point out other promising pass bands for the observations of flux-tube structures.

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 287 - 290
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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