The second order asymptotic theory for the solar and stellar low degree acoustic mode predictions

Details The second order asymptotic theory for the solar and stellar low degree acoustic mode predictions The second order asymptotic theory for the solar and stellar low degree acoustic mode predictions

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...290..845l&link_type=abstract

Astronomy and Astrophysics 290, 845-860 (1994)

Astronomy and Astrophysics

Astrophysics

20

Sun: Oscillations, Stars: Oscillations

Scientific paper

We discuss the new asymptotic formulae, obtained by Tassoul and Vorontsov without the Cowling approximation, for the acoustic modes of low degree. We deduce second-order asymptotic expressions which recover the absolute value of the solar calculated eigenfrequencies within 10μHz for degrees lower than 12 and frequencies between 1mHz<=ν<=5mHz. This result is compared with the previous ones obtained in a first or second-order asymptotic theories. The different seismic parameters: {DELTA}ν_l,n_ , δ_2nu_l,n_ and δν_l,n_ , the phase shift α and its derivative β_l,n_ are also determined and the influence of the different physical processes are emphasized.

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