Anupam Bhardwaj

On the variation of Fourier parameters for Galactic and LMC Cepheids at optical, near-infrared and mid-infrared wavelengths

We present a light curve analysis of fundamental-mode Galactic and Large Magellanic Cloud (LMC) Cepheids based on the Fourier decomposition technique. We have compiled light curve data for Galactic and LMC Cepheids in optical ({\it VI}), near-infrared ({\it JHK}

Large Magellanic Cloud Near-Infrared Synoptic Survey – III. A statistical study of non-linearity in the Leavitt Laws

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LARGE MAGELLANIC CLOUD NEAR-INFRARED SYNOPTIC SURVEY. II. THE WESENHEIT RELATIONS AND THEIR APPLICATION TO THE DISTANCE SCALE

) and mid-infrared (3.6

Empirical period–colour and amplitude–colour relations for Classical Cepheids and RR Lyrae variables

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Large Magellanic Cloud Near-infrared Synoptic Survey. IV. Leavitt Laws for Type II Cepheid Variables

4.5-

Period-Luminosity Relations Derived from the OGLE-III Fundamental Mode Cepheids. II. the Small Magellanic Cloud Cepheids

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UPDATED 24 μm PERIOD–LUMINOSITY RELATION DERIVED FROM GALACTIC CEPHEIDS

m) bands from the literature and determined the variation of their Fourier parameters as a function of period and wavelength. We observed a decrease in Fourier amplitude parameters and an increase in Fourier phase parameters with increasing wavelengths at a given period. We also found a decrease in the skewness and acuteness parameters as a function of wavelength at a fixed period. We applied a binning method to analyze the progression of the mean Fourier parameters with period and wavelength. We found that for periods longer than about 20 days, the values of the Fourier amplitude parameters increase sharply for shorter wavelengths as compared to wavelengths longer than the

A comparative study of multiwavelength theoretical and observed light curves of Cepheid variables

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Period–Luminosity relations derived from the OGLE-III first-overtone mode Cepheids in the Magellanic Clouds

-band. We observed the variation of the Hertzsprung progression with wavelength. The central period of the Hertzsprung progression was found to increase with wavelength in the case of the Fourier amplitude parameters and decrease with increasing wavelength in the case of phase parameters. We also observed a small variation of the central period of the progression between the Galaxy and LMC, presumably related to metallicity effects. These results will provide useful constraints for stellar pulsation codes that incorporate stellar atmosphere models to produce Cepheid light curves in various bands.

PERIOD–COLOR AND AMPLITUDE–COLOR RELATIONS AT MAXIMUM AND MINIMUM LIGHT FOR RR LYRAE STARS IN THE SDSS STRIPE 82 REGION

We present a detailed statistical analysis of possible non-linearities in the Period-Luminosity (P-L), Period-Wesenheit (P-W) and Period-Color (P-C) relations for Cepheid variables in the LMC at optical (