On the acoustic flux of Sirius A
1981; IOP Publishing; Volume: 243; Linguagem: Inglês
10.1086/158619
ISSN1538-4357
AutoresG. Fontaine, B. Villeneuve, J. M. Wilson,
Tópico(s)Astro and Planetary Science
Resumoview Abstract Citations (45) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the acoustic flux of Sirius A. Fontaine, G. ; Villeneuve, B. ; Wilson, J. Abstract Acoustic fluxes generated in the superficial convection zones of lower main-sequence stars are estimated. The results are shown to be very sensitive to the assumed convective efficiency of the mixing-length theory. In the case of Sirius A, the uncertainties actually bracket the minimum acoustic flux needed to heat a corona. Models of Sirius A that are both consistent with this minimum flux and the Am nature of its spectral type can be obtained. It is suggested that the recent Einstein soft X-ray detection of Sirius A could possibly be explained in terms of emission from an acoustically-heated corona surrounding that star. Other main-sequence stars could also generate more acoustic energy than is generally believed. Publication: The Astrophysical Journal Pub Date: January 1981 DOI: 10.1086/158619 Bibcode: 1981ApJ...243..550F Keywords: Acoustic Propagation; Convective Flow; Heat Flux; Main Sequence Stars; Stellar Coronas; X Ray Sources; Atmospheric Heating; Mixing Length Flow Theory; Stellar Envelopes; Stellar Temperature; Astrophysics full text sources ADS | data products SIMBAD (1)
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