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| Paper: |
Estimating the Fractional Area Coverage of Active Regions in Dwarf Stars |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
1111 |
| Authors: |
Andretta, V.; Giampapa, M. |
| Abstract: |
It has been shown (Andretta & Giampapa 1995) that
the two He I triplet lines at 1.083 μm and 587.6 nm, respectively, can be
utilized to infer the area coverage of active (plage-like) regions on stellar
surfaces by exploiting their different responses to chromospheric heating. This
kind of information, which is very difficult to obtain through other methods,
can serve as a fundamental constraint for the development of stellar dynamo
theory. We discuss the application and limitations of this approach to the
interpretation of spatially resolved solar data along with some preliminary
stellar observations. |
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