X-ray emission from acoustically heated coronae

Details X-ray emission from acoustically heated coronae X-ray emission from acoustically heated coronae

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216..139s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 139-142.

Computer Science

Sound

39

Acoustic Excitation, Magnetoacoustics, Shock Waves, Stellar Coronas, X Ray Sources, Late Stars, Sound Waves, Stellar Atmospheres, Stellar Models

Scientific paper

Based on the limiting shock strength behavior of acoustic waves, the expected X-ray emission from purely acoustically heated coronae is estimated. The gas pressure at the base of the transition layer of selected stars is first estimated using available empirical chromospheric models. X-ray fluxes derived from the predicted limiting acoustic fluxes are found to be much smaller than the observed fluxes. The results support the argument that the observed coronae are generated by magnetic heating.

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