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Measurements of chromospheric velocity fields by means of the Coimbra University spectroheliograph
- 1.0355587 - ASÚ 2011 RIV HR eng J - Journal Article
Garcia, A. - Klvaňa, Miroslav - Sobotka, Michal
Measurements of chromospheric velocity fields by means of the Coimbra University spectroheliograph.
Central European Astrophysical Bulletin. Roč. 34, č. 1 (2010), s. 47-56. ISSN 1845-8319
R&D Projects: GA AV ČR IAA300030808
Institutional research plan: CEZ:AV0Z10030501
Keywords : Sun * chromosphere * instrumentation
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
The Coimbra University spectroheliograph produces high-quality full-disc spectroheliograms in the lines Hα, Ca II K3, Ca II K1, and adjacent continua. The reduction software was extended to enable the measurement of velocity fields in Hα. We describe the instrument, the data processing, present the first results of the velocity measurements, and discuss the possibilities of improvement of their quality.
Permanent Link: http://hdl.handle.net/11104/0194323
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