𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On depth-dependence of photospheric oscillations

✍ Scribed by A. Koch; G. Küveler; E. H. Schröter

Publisher
Springer
Year
1979
Tongue
English
Weight
561 KB
Volume
64
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.

✦ Synopsis

We report on results from photographic observations of photospheric oscillations as a function of depth. Using rms-values and power-spectra from shifts of entire line-profiles, we find qualitatively an increase of the velocity-amplitude with increasing height. We get more quantitative informations by comparing measured asymmetries of line-profiles with calculated ones derived from Voigt-functions containing a depth dependent velocity-field.

We find the scale-height Ho of photospheric velocity oscillations to be 930 + 100 km. This result is to be compared with H0 = 1100 + 200 km obtained by Canfield (1976), who used velocity weighting functions of the line centres.

Further, we show that a general observed line asymmetry of medium strong lines (c-shape) does not depend on the phase of oscillations.

📜 SIMILAR VOLUMES

On the powerspectrum of the photospheric
On the powerspectrum of the photospheric resonance oscillations
✍ Franz-Ludwig Deubner 📂 Article 📅 1972 🏛 Springer 🌐 English ⚖ 137 KB

In a recent paper ; hereafter called Paper A) the author pointed out that multiple peaks in the Fourier spectra of the 5-rain oscillations as reported by others and discussed in several theoretical papers, do not characterize the average solar atmosphere, but result from insufficient statistical sta

Contribution to the observation of the p
Contribution to the observation of the photospheric oscillations
✍ E. Fossat; G. Ricort 📂 Article 📅 1973 🏛 Springer 🌐 English ⚖ 345 KB

Observations of the 300 s photospheric oscillation on large solar surfaces (up to 5 '20" in diameter) using a sodium optical resonance cell seem to show that the power at long horizontal wavelengths is larger than previous results would indicate. In order to get more information about the spatial di

Depth-dependent line blanketing by neutr
Depth-dependent line blanketing by neutral and ionized metals in a homogeneous model solar photosphere
✍ Thomas E. Margrave 📂 Article 📅 1970 🏛 Springer 🌐 English ⚖ 157 KB

Line blanketing due to both the neutral and ionized metals is treated here by the modified picket-fence method and applied to the case of a homogeneous model solar photosphere in strict radiative equilibrium. Improvement in fitting the observed photospheric radiation field is noted over a model in w