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What can be learnt from full disk X-ray observations of stellar flares?

  • J.H.M.M. Schmitt (a1), H. Fink (a1) and F.R. Harnden (a2)

Extract

The Einstein Observatory demonstrated the existence of hot envelopes, i.e., stellar coronae, around most classes of normal stars (Vaiana et al. 1981). The coronae of late type stars of spectral type F through M are generally thought to be solar-like, i.e., structured and organised by the magnetic field topology and heated by some process(es) involving magnetic energy. Here the property “solar-like” does not refer to the optical appearance of a star, but rather to the role played by magnetic fields in the outer stellar envelope (Linsky 1985). Since it is difficult to measure magnetic fields on other stars directly, a number of indirect indicators is used in order to infer whether a corona should be considered “solar-like” or not.

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Copyright

References

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Haisch, B.M., 1983, in Activity in Red Dwarf Stars, ed. Byrne, P.B. and Rodono, M., Reidel Publishing Company, Dordrecht.
Linsky, J.L., 1985, Solar Physics, 100, 333.
Vaiana, G.S. et al., 1981, Ap. J. 245, 163.

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