Radial and Nonradial Oscillations of 63 Her (HD155514 = HR6391)

Authors : Rikkat CİVELEK, Nilgün KIZILOĞLU, Halil KIRBIYIK

Pages : 185-192

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :An attempt has been made toward explaining the observed frequencies in 63 Her. A sequence of evolutionary models have been calculated up to a point where stellar parameters match the observed luminosity and effective temperature of 63 Her. Radial and nonradial oscillations frequencies were obtained for a series of masses 1.85, 1.90 and 1.95 M\odot and eigth models which represent best the pulsations of 63 Her are given in this paper. Calculations are restricted to low harmonic degrees insert ignore into journalissuearticles values( l= 0,1,2,3 );. Six of the eigth observed frequencies quoted in literature were obtained. These we obtained for the model of mass 1.90 M\odot. The observationally measured frequency 220.7 m Hz, which is classified as a second harmonic radial oscillation, and five of the observed nonradial modes were obtained at the harmonic degree l=3. The difference between the observed and calculated frequencies are insert ignore into journalissuearticles values(nn/l,c - nobs);= 0.3, 0.8, 0.7, 0.2, and 0.7 m Hz with n/l= -15/3, -12/3, -9/3, -7/3, -3/3, respectively.
Keywords : Stars 63 Her, pulsations, evolution