Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008an....329..494s&link_type=abstract
Astronomische Nachrichten, Vol.329, Issue 5, p.494
Astronomy and Astrophysics
Astronomy
7
Sun: Atmosphere, Sun: Helioseismology, Sun: Oscillations
Scientific paper
In this work we investigate p-mode power variation with solar atmosphere. To this aim, we use THÉMIS observations of the Na D1 (λ5896 Å) and K (λ7699 Å) spectral lines. While the formation heights of the K spectral line are essentially located in the photospheric layer, the formation heights of the Na D1 line span a much wider region: from photosphere up to chromosphere. Hence, we had the opportunity to infer p-mode power variation up to the chromospheric layer. By analyzing power spectra obtained by temporal series at different points of the Na D1 and K spectral lines, we confirm and quantify the increase in p-mode power towards higher atmospheric layers. Furthermore, the large span in formation heights of the Na D1 line induces a larger enhancement of p-mode power with solar atmosphere compared to the K spectral line.
Garcia Rafael A.
Jiménez-Reyes Sebastián J.
Pallé Pere Lluis
Simoniello Rosaria
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