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| Paper: |
Spectroscopic Preparation for AXAF and XMM |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
487 |
| Authors: |
Brickhouse, N. S. |
| Abstract: |
AXAF and XMM will provide unprecedented spectral resolution, flux calibration, bandpass, and throughput for studies of stellar coronae. Building on results from EUVE, ASCA, and other X-ray missions, high signal-to-noise grating observations will produce diagnostics for temperatures, densities, and abundances to address major scientific questions of cool star coronae, in particular the structure of hot emitting regions. Furthermore, we will be able to test the simplifying assumptions generally applied to lower resolution data, namely that the corona is an optically thin, equilibrium plasma. Deviations from these assumptions may ultimately provide the best clues to the nature of coronal heating. In recent years tremendous effort and great progress have been made in the atomic physics needed for coronal modeling. We discuss the current status of models and directions that future work must take to maximize the scientific return from AXAF and XMM. |
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