Abstract
The method of computer controlled photoelectric drift scans has been improved by virtue of a new timing technique, allowing for an accuracy of 4 ms or equivalently 50 km on the Sun. With this technique, our previous result for the solar semidiameter has been confirmed: R = 960.277″. The extreme solar limb intensity profile at 5012 Å has been derived from drift scans. A comparison with the computed profile has been made, and parameters for the base of the chromosphere have been derived.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Böhm, K. H. and Böhm-Vitense, E.: 1960, Z. Astrophys. 50, 69.
Dunn, R. B.: 1959, Astrophys. J. 130, 972.
Gaustad, J. E. and Rogerson, J. B.: 1961, Astrophys. J. 134, 323.
Gingerich, O., Noyes, R. W., Kalkofen, W., and Cuny, Y.: 1971, Solar Phys. 18, 347.
Holweger, H.: 1967, Z. Astrophys. 65, 365.
Unsöld, A.: 1955, Physik der Sternatmosphären, Springer, Berlin.
Weart, S. R. and Faller, J. E.: 1969, Astrophys. J. 157, 887.
Wilson, P. R.: 1966, Astrophys. J. 146, 241.
Wittmann, A.: 1973, Solar Phys. 29, 333 (Paper I).
Wittmann, A.: 1974, Solar Phys. 35, 11 (Paper II).
Zwaan, C.: 1965, Rech. Astron. Obs. Utrecht 17, 4.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wittmann, A. Photoelectric drift scans II: time pulse evaluation, limb profiles, and the solar diameter. Sol Phys 36, 65–68 (1974). https://doi.org/10.1007/BF00151544
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00151544