A multiphase study of theoretical and observed light curves of classical Cepheids in the Magellanic Clouds

Abstract

We present an analysis of the theoretical and observed light curve parameters of the fundamental mode (FU) classical Cepheids in the Magellanic Clouds in $V$- and $I$- photometric bands. The state-of-the-art 1D non-linear radial stellar pulsation (RSP) code in MESA (\textsc{mesa-rsp}) has been utilized to generate the theoretical light curves using four sets of convection parameters. Theoretical light curves with two chemical compositions: $Z=0.008$ and $Z=0.004$ appropriate for the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), respectively, covered a wide range of periods ($3<P(\mathrm{d})<32$). The observed light curves are taken from the OGLE-IV database. We compare theoretical and observed Fourier parameters (FPs), and investigate the period-luminosity (PL), period-colour (PC), and amplitude-colour (AC) relations as a function of pulsation phase for short ($\log P<1$), long ($\log P>1$) and all periods. The multiphase relations obtained from theoretical and observed light curves in the PL/PC/AC plane are found to be dynamic in nature, with the effect more pronounced at $\Phi \sim 0.75-0.85$. Furthermore, a contrasting behaviour of the theoretical/observed multiphase PL and PC relations between the short and long periods has been found for both LMC and SMC. The analysis shows that multiphase PL relations are more stringent to test the models with observations over the FPs. Distances to the LMC/SMC determined using long period Cepheids are found to be in good agreement with the literature values when the term $R_{21}$ is added to the PL relation.

arXiv comment17 pages, 11 Figures and 9 Tables. Accepted for publication by MNRAS

References in corpus (57)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• A distance to the Large Magellanic Cloud that is precise to one per cent
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• New Period-Luminosity and Period-Color Relations of Classical Cepheids: I. Cepheids in the Galaxy
• A distance determination to the Small Magellanic Cloud with an accuracy of better than 2 percent based on late-type eclipsing binary stars
• Intermediate-mass star models with different helium and metal contents
• The Carnegie Hubble Program: The Distance and Structure of the SMC as Revealed by Mid-infrared Observations of Cepheids
• New Period-Luminosity and Period-Color Relations of Classical Cepheids: II. Cepheids in LMC
• OGLE-ing the Magellanic System: Optical Reddening Maps of the Large and Small Magellanic Cloud from Red Clump Stars
• The VMC Survey. XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids
• Old-Aged Stellar Population Distance Indicators
• Nonlinear Beat Cepheid and RR Lyrae Models
• On the effect of rotation on populations of classical Cepheids I. Predictions at solar metallicity
• Light curve analysis of Variable stars using Fourier decomposition and Principal component analysis
• New period-luminosity and period-color relations of classical Cepheids: III. Cepheids in SMC
• Further empirical evidence for the non-linearity of the period-luminosity relations as seen in the Large Magellanic Cloud Cepheids
• Period-Luminosity Relations Derived from the OGLE-III Fundamental Mode Cepheids
• The effect of metallicity on Cepheid Period-Luminosity relations from a Baade-Wesselink analysis of Cepheids in the Milky Way and Magellanic Clouds
• Period-color and amplitude-color relations in classical Cepheid variables
• The Eclipsing Binary Cepheid OGLE-LMC-CEP-0227 in the Large Magellanic Cloud: pulsation modelling of light and radial velocity curves
• The influence of metallicity on the Leavitt Law from geometrical distances of Milky Way and Magellanic Clouds Cepheids
• Discovery of period doubling in BL Herculis stars of the OGLE survey. Observations and theoretical models
• High-precision distance measurements with classical pulsating stars
• Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: I. HARPS-N@TNG spectroscopy of 47 Classical Cepheid and 1 BL Her variables
• The VMC Survey. XIX. Classical Cepheids in the Small Magellanic Cloud
• The VMC Survey -- XLVIII. Classical Cepheids unveil the 3D geometry of the LMC
• Large Magellanic Cloud Near-Infrared Synoptic Survey. III. A Statistical Study of Non-Linearity in the Leavitt Laws
• Testing the nonlinearity of the BVIcJHKs period-luminosity relations for the Large Magellanic Cloud Cepheids
• Disk of the Small Magellanic Cloud as traced by Cepheids
• A Comparative Study of Multiwavelength Theoretical and Observed Light Curves of Cepheid Variables
• Period-color and amplitude-color relations in classical Cepheid variables III: The Large Magellanic Cloud Cepheid models
• On the Period--Luminosity--Metallicity relation of Classical Cepheids
• Morphology and metallicity of the Small Magellanic Cloud using RRab stars
• The M31 Near-Infrared Period-Luminosity Relation and its non-linearity for $\delta$ Cep Variables with $0.5\le \log (P)\le 1.7$
• Multiwavelength Period-Luminosity and Period-Luminosity-Color relations at maximum-light for Mira variables in the Magellanic Clouds
• Period-colour and amplitude-colour relations in classical Cepheid variables IV: The multi-phase relations
• Nonlinear Period-Luminosity Relation for the Large Magellanic Cloud Cepheids: Myths and Truths
• Period-colour and amplitude-colour relations in classical Cepheid variables II: the Galactic Cepheid model
• The Mid-Infrared Period-Luminosity Relations for the Small Magellanic Cloud Cepheids Derived from Spitzer Archival Data
• Period-color and amplitude-color relations in classical Cepheid variables V: The Small Magellanic Cloud Cepheid models
• A theoretical framework of BL Her stars. I. Effect of metallicity and convection parameters on period-luminosity and period-radius relations
• Investigations of the Non-Linear LMC Cepheid Period-Luminosity Relation with Testimator and Schwarz Information Criterion Methods
• On the variation of light curve parameters of RR Lyrae variables at multiple wavelengths
• Period-Luminosity Relations for Cepheid Variables: From Mid-Infrared to Multi-Phase
• Empirical Period-Color and Amplitude-Color Relations for Classical Cepheids and RR Lyrae Variables
• Convective hydrocodes for radial stellar pulsation. Physical and numerical formulation
• Period-Luminosity Relations Derived From the OGLE-III Fundamental Mode Cepheids II: The Small Magellanic Cloud Cepheids
• The stellar photosphere-hydrogen ionization front interaction in Classical Pulsators: a theoretical explanation for observed period-colour relations
• Turbulent Convective Cepheid Models: Linear Properties
• Period-luminosity and period-luminosity-colour relations for Mira variables at maximum light
• Period-Color and Amplitude-Color Relations in Classical Cepheid Variables - VI. New Challenges for Pulsation Models
• Geometry of the Large Magellanic Cloud Using Multi- wavelength Photometry of Classical Cepheids
• Period-Colour and Amplitude-Colour relations for OGLE-$\delta$ Scuti stars in the Galactic Bulge and LMC

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