Abstract
A period of minimum solar activity in April and May 1996 was used to analyze full-disk Ca K spectroheliograms with the aim of deriving the intensity thresholds of the quiet network and the plages by applying the so-called inflexion point method. The average network intensity threshold is found to be influenced mainly by the seeing, whereas the average plage threshold shows an increasing trend from disk center towards the solar limb. Both parameters are compared with the results of other authors.
Paper presented at the SOLERS22 International Workshop, held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, U.S.A., June 17–21, 1996.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Brandt, P. N. and Steinegger, M.: 1998, Solar Phys. 177, 287 (this issue).
Fröhlich, C., Romero, J., Roth, H. J., Wehrli, C., Andersen, B. N., Appourchaux, T., Domingo, V., Telljohann, U., Berthomieu, G., Delache, P., Provost, J., Toutain, T., Crommelynck, D. A., Chevalier, A., Fichot, A., Däppen, W., Gough, D., Hoeksema, T., Jiménez, A., Gomez, M. F., Herreros, J. M., Roca Cortés, T., Jones, A. R., Pap, J. M., and Willson, R. C.: 1995, Solar Phys. 162, 101.
Harvey, K. L.: 1993, ‘Magnetic Bipoles on the Sun’, Thesis, University of Utrecht.
Harvey, K. L. and White, O. R.: 1996, SPRC Technical Report 96-01.
Hirzberger, J., Vázquez, M., Bonet, J. A., Hanslmeier, A., and Sobotka, M.: 1997, Astrophys. J., in press.
Schrijver, C. J.: 1987, Astron. Astrophys. 180, 241.
Skumanich, A., Smythe, C., and Frazier, E. N.: 1975, Astrophys. J. 200, 747.
Skumanich, A., Lean, J. L., White, O. R., and Livingston, W. C.: 1984, Astrophys. J. 282, 776.
Steinegger, M., Brandt, P. N., and Haupt, H. F.: 1996, Astron. Astrophys. 310, 635.
Steinegger, M., Bonet, J. A., and Vázquez, M.: 1997, Solar Phys. 171, 303.
Steinegger, M., Vázquez, M., Bonet, J. A., and Brandt, P. N.: 1996, Astrophys. J. 461, 478.
Worden, J. R., White, O. R., and Woods, T. N.: 1997, Astrophys. J., submitted.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Steinegger, M., Bonet, J.A., Vázquez, M., Jiménez, A. (1998). On the Intensity Thresholds of the Network and Plage Regions. In: Pap, J.M., Fröhlich, C., Ulrich, R.K. (eds) Solar Electromagnetic Radiation Study for Solar Cycle 22. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5000-2_23
Download citation
DOI: https://doi.org/10.1007/978-94-011-5000-2_23
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6099-8
Online ISBN: 978-94-011-5000-2
eBook Packages: Springer Book Archive