Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.170...23r&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Astronomy and Astrophysics
Astrophysics
2
Astronomical Photometry, Line Spectra, Solar Granulation, Solar Spectra, Spatial Distribution, Astronomical Spectroscopy, Frequency Shift, Power Spectra, Solar Limb
Scientific paper
From high-resolution CCD images of granulation obtained at the Swedish Solar Tower of the Observatorio del Roque de los Muchachos at different positions on the solar disk, mean bi-dimensional spatial power spectra have been obtained at each position and restored following the method proposed by Rodriguez Hidalgo et al. (1990). The variation with latitude of the power spectrum, of the granular brightness contrast and of the mean wave number of the power spectrum are presented. The analysis is completed with spectroscopic observations obtained at the Gregory Coude Telescope of the Observatorio del Teide. The center-to-limb and latitudinal variation of the bisectors, residual intensities and equivalent widths are shown for several photometric lines.
Collados Manuel
Rodríguez Hidalgo Inés
Vazquez Manuel
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