Manifestation of the 399-day variations in solar wind parameters
| Autor: | L. I. Miroshnichenko, S. N. Samsonov, N. G. Skryabin, V. E. Timofeev |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
Magnitude (mathematics) Astronomy and Astrophysics Planetary system Orbital period Atmospheric sciences Jupiter Solar wind Amplitude Space and Planetary Science Physics::Space Physics Coronal mass ejection Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Variation (astronomy) |
| Zdroj: | Astronomy Letters. 31:832-835 |
| ISSN: | 1562-6873 1063-7737 |
| DOI: | 10.1134/1.2138770 |
| Popis: | Based on a large series (N = 14 038) of daily solar wind densities, we obtained the fluctuation power spectrum. The spectrum shows that the 399-day variation (the synodic period of Jupiter) has the largest amplitude in the interval of periods from 20 to 800 days. It is second in magnitude only to the secular, 22-, and 11-year variations. The amplitudes of the 399-day variations in solar wind density, temperature, and speed were determined by a superposed-epoch analysis: ≈0.5 cm−3, ≈8000 K, and 2.8 km s−1, respectively, at a more than 95% confidence level. This leads us to conclude that Jupiter may affect the solar wind parameters, since only Jupiter has a 399-day periodicity in our planetary system. |
| Databáze: | OpenAIRE |
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