The Solar Wind Energy Flux

Details The Solar Wind Energy Flux The Solar Wind Energy Flux

2012-03-06

arxiv.org/abs/1203.1316v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

12 pages, 5 figures

Scientific paper

The solar-wind energy flux measured near the ecliptic is known to be independent of the solar-wind speed. Using plasma data from Helios, Ulysses, and Wind covering a large range of latitudes and time, we show that the solar-wind energy flux is independent of the solar-wind speed and latitude within 10%, and that this quantity varies weakly over the solar cycle. In other words the energy flux appears as a global solar constant. We also show that the very high speed solar-wind (VSW > 700 km/s) has the same mean energy flux as the slower wind (VSW < 700 km/s), but with a different histogram. We use this result to deduce a relation between the solar-wind speed and density, which formalizes the anti-correlation between these quantities.

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