The particle and radiation environment of the early Sun

Details The particle and radiation environment of the early Sun The particle and radiation environment of the early Sun

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..209t&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

2

Early Sun: High-Energy Particles, X-Ray Luminosity

Scientific paper

Multi-wavelength studies of solar-like G-type stars at several stages of their main sequence evolution indicate that our early Sun must have undergone a highly active phase in its particle and radiation environment 3.5-4.5 Gyr ago. An overview of that problem can be found e.g. in Guinan and Ribas (2002) and Hanslmeier (2002). Detailed observations of such stars by the ROSAT and ASCA X-ray satellites show that the X-ray luminosity may have been several hundred times higher than today. We investigate in our study how these high X-ray fluxes could be connected to the mass loss and particle outflow of these stars and how such an enhanced particle and radiation environment has influenced the evolution of planetary bodies in our solar system at least up to 3.0 Gyr ago.

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