Multiwavelength light curve analysis of Cepheid variables

Abstract

We present results from a detailed analysis of theoretical and observed light curves of classical Cepheid variables in the Galaxy and the Magellanic Clouds. Theoretical light curves of Cepheid variables are based on non-linear convective hydrodynamical pulsation models and the observational data are taken from the ongoing wide-field variability surveys. The variation in theoretical and observed light curve parameters as a function of period, wavelength and metallicity is used to constrain the input physics to the pulsation models, such as the mass-luminosity relations obeyed by Cepheid variables. We also account for the variation in the convective efficiency as input to the stellar pulsation models and its impact on the theoretical amplitudes and Period-Luminosity relations for Cepheid variables.

4 pages, 1 figure, Proceedings IAU Symposium No. IAUS 339, 2018, Southern Horizons in Time-Domain Astronomy

References in corpus (5)

• A 2.4% Determination of the Local Value of the Hubble Constant
• On the Variation of Fourier Parameters for Galactic and LMC Cepheids at Optical, Near-Infrared and Mid-Infrared Wavelengths
• The VMC survey - XXIII. Model fitting of light and radial velocity curves of Small Magellanic Cloud classical Cepheids
• A Comparative Study of Multiwavelength Theoretical and Observed Light Curves of Cepheid Variables
• Empirical Period-Color and Amplitude-Color Relations for Classical Cepheids and RR Lyrae Variables