Computer Science – Sound
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...136..338b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 136, no. 2, July 1984, p. 338-350. Research supported by the Deutsche Forschun
Computer Science
Sound
111
Acoustic Excitation, Late Stars, Stellar Atmospheres, Convection, Heisenberg Theory, Mach Number, Sound Waves, Stellar Models, Stellar Structure
Scientific paper
Former computations relating to the acoustic energy generation from convection zones of late type stars need to be revised. By taking into account the effect of absorption by dust and molecules for the opacity tables and improving the calculation of thermodynamical quantities by including molecular dissociation the stellar convection zone models yield larger convective velocities. Moreover, for low temperatures and high surface gravities, the neglect of monopole- and dipole-source terms for the calculation of the sound generation by the Lighthill-Proudman theory causes a large deficiency in the resulting acoustic output. Improved calculations are carried out for stellar parameters in the range 0 ≤ log g ≤ 6 and 2500K ≤ Teff ≤ 10,500K and show for the latest stars up to five orders of magnitude more acoustic energy than the usual models.
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