Element Separation in the Chromosphere Ionization-Diffusion Models for the FIP-Effect |
| |
Authors: | Hardi Peter |
| |
Institution: | (1) High Altitude Observatory/, NCAR, Boulder, USA and;(2) Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany |
| |
Abstract: | Ionization-diffusion mechanisms to understand the first ionization potential (FIP) fractionation as observed in the solar
corona and the solar wind are reviewed. The enrichment of the low-FIP elements (<10 eV) compared to the high-FIP elements,
seen in e.g. slow and fast wind or polar plumes, is explained. The behaviour of the heavy noble gases becomes understandable.
The absolute fractionation, i.e. in relation to hydrogen, can be calculated and fits well to the measurements. The theoretical
velocity-dependence of the fractionation will with used to determine the velocities of the solar wind in the chromosphere.
This revised version was published online in June 2006 with corrections to the Cover Date. |
| |
Keywords: | Sun: abundances chromosphere solar wind |
本文献已被 SpringerLink 等数据库收录! |
|