| Issue |
A&A
Volume 392, Number 1, September II 2002
|
|
|---|---|---|
| Page(s) | 329 - 334 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361:20020945 | |
| Published online | 22 August 2002 | |
Solar differential rotation determined by tracing coronal bright points in SOHO-EIT images
II. Results for 1998/99 obtained with interactive and automatic methods
1
Kiepenheuer-Institut für Sonnenphysik (KIS), Schöneckstr. 6, 79104 Freiburg, Germany e-mail: hw@kis.uni-freiburg.de
2
Hvar Observatory, Faculty of Geodesy, University of Zagreb, Kačićeva 26, 10000 Zagreb, Croatia e-mail: romanb@geodet.geof.hr; bvrsnak@geodet.geof.hr; vruzdjak@geodet.geof.hr
3
Observatoire Royal de Belgique (ORB), Av. Circulaire 3, 1180 Bruxelles, Belgium e-mail: Frederic.Clette@oma.be; hochedez@oma.be
Corresponding author: R. Brajša, rbrajsa@kis.uni-freiburg.de
Received:
15
April
2002
Accepted:
6
June
2002
Full-disc solar images obtained with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) were used to analyse solar differential rotation by tracing coronal bright points. The results obtained with the interactive and the automatic method for the time period June 4, 1998 to May 22, 1999 are presented and compared. A possible north–south rotational asymmetry and differences in the rotation velocity curves for various subtypes of tracers are investigated.
Key words: Sun: corona / Sun: UV radiation / Sun: rotation
© ESO, 2002
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