Title: Fourier coefficients of variable stars. II - Light-curve analysis
Abstract:view Abstract Citations (29) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Fourier Coefficients of Variable Stars. II. Light-Curve Analysis Stellingw...view Abstract Citations (29) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Fourier Coefficients of Variable Stars. II. Light-Curve Analysis Stellingwerf, R. F. ; Donohoe, M. Abstract In a previous paper, simple models were used to generate a set of radial velocity curves showing the effect of varying amplitude and central condensation of a star. A single parameter adequately describes the variation in the shape of all the velocity curves considered: the skewness of the curve. In this paper, light curves generated by a nonadiabatic nonlinear one-zone model are considered. A set of curves with nearly constant skewness are used to show the importance of a second parameter: the narrowness or 'acuteness' of the curve, defined in the same way as the skewness parameter. This property of the light-curve shape is responsible for the smooth variation of Fourier phases seen in RR Lyrae stars and many Cepheids. In the one-zone model, the value of the acuteness is determined by the opacity variation in the deep envelope below the ionization zones; it could prove to be a probe of interior stellar structure. Publication: The Astrophysical Journal Pub Date: March 1987 DOI: 10.1086/165054 Bibcode: 1987ApJ...314..252S Keywords: Cepheid Variables; Fourier Analysis; Light Curve; Stellar Structure; Variable Stars; Radial Velocity; Stellar Models; Stellar Oscillations; Astrophysics; STARS: CEPHEIDS; STARS: PULSATION; STARS: RR LYRAE; STARS: VARIABLES full text sources ADS | data products SIMBAD (1)Read More