The Optical Gravitational Lensing Experiment. Cepheids in the Magellanic Clouds. VI. Double-Mode Cepheids in the Large Magellanic Cloud

TL;DR

This paper reports the discovery and analysis of 76 double-mode Cepheids in the Large Magellanic Cloud, examining their pulsation modes, period ratios, light curve properties, and distribution in the color-magnitude diagram.

Contribution

It provides a detailed catalog and analysis of double-mode Cepheids in the LMC, including their pulsation modes, period ratios, and light curve characteristics, expanding understanding of stellar pulsations.

Findings

76 double-mode Cepheids identified in the LMC

Analysis of period ratios and Fourier parameters conducted

Distribution of Cepheids in the color-magnitude diagram illustrated

Abstract

We present a sample of 76 double-mode Cepheids detected in the 4.5 square degree area in the central part of the LMC. 19 stars from the sample pulsate in the fundamental mode and the first overtone while 57 objects are the first and second overtone pulsators. We analyze the period ratio of double-mode Cepheids and Fourier parameters of decomposition of the light curves of these objects. We also present location of different type Cepheids from the LMC in the color-magnitude diagram and show the distribution of their ${V-I}$ color indices.