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| Paper: |
The relationship between EXOSAT soft X-ray and Mt. Wilson CA II H+K flux densities |
| Volume: |
9, Cool Stars, Stellar Systems, and the Sun: Sixth Cambridge Workshop |
| Page: |
136 |
| Authors: |
Schrijver, C. J.; Giommi, P.; Dobson, A. K.; Radick, R. R. |
| Abstract: |
Data of Exosat soft X-ray fluxes, F(X), are compared to Mount Wilson Ca II H+K flux measurements, F(Ca), to assess the probability of nonradiatively heated atmospheres when coronal emissions cannot be observed. F(X) and F(Ca) have been observed within three days of each other in 13 stars and within 90 days in 8 stars, and the average interval for all but three stars is about 3 days. The Exosat data and the Einstein data are employed to relate F(X) and F(Ca) by means of a power law, which is consistent with the notion that X-ray fluxes are very low at the Ca II H+K lower limit flux. |
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