Detection of a significant change in the solar diameter
Additional information
Authors
Wittmann A.,
Alge E.,
Bianda M.
Type
Journal Article
Year
1993
Language
English
Abstract
Drift-time measurements of the solar diameter made at Izaña and Locarno in 1990-1992 show a significant increase of the observed angular semidiameter when compared to results obtained at the same two sites in 1981. The observed increase of ≈0.4″ is not due to a systematic (or long-term) variation, but seems to reflect a more complicated behaviour with time: As both series of measurements were made around a maximum of the 11-year cycle, it seems that a variation in phase with solar activity (in the sense of the Secchi-Rosa law) can be ruled out.
Journal
Solar Physics
Volume
145
Start page number
205
Keywords
irsol-refereed-scientific-papers
