The VMC survey - XXIII. Model fitting of light and radial velocity curves of Small Magellanic Cloud classical Cepheids

Abstract

We present the results of the chi2 minimization model fitting technique applied to optical and near-infrared photometric and radial velocity data for a sample of 9 fundamental and 3 first overtone classical Cepheids in the Small Magellanic Cloud (SMC). The near- infrared photometry (JK filters) was obtained by the European Southern Observatory (ESO) public survey "VISTA near-infrared Y; J;Ks survey of the Magellanic Clouds system"(VMC). For each pulsator isoperiodic model sequences have been computed by adopting a nonlinear convective hydrodynamical code in order to reproduce the multi- filter light and (when available) radial velocity curve amplitudes and morphological details. The inferred individual distances provide an intrinsic mean value for the SMC distance modulus of 19.01 mag and a standard deviation of 0.08 mag, in agreement with the literature. Moreover the instrinsic masses and luminosities of the best fitting model show that all these pulsators are brighter than the canonical evolutionary Mass- Luminosity relation (MLR), suggesting a significant efficiency of core overshooting and/or mass loss. Assuming that the inferred deviation from the canonical MLR is only due to mass loss, we derive the expected distribution of percentage mass loss as a function of both the pulsation period and of the canonical stellar mass. Finally, a good agreement is found between the predicted mean radii and current Period-Radius (PR) relations in the SMC available in the literature. The results of this investigation support the predictive capabilities of the adopted theoretical scenario and pave the way to the application to other extensive databases at various chemical compositions, including the VMC Large Magellanic Cloud pulsators and Galactic Cepheids with Gaia parallaxes.

arXiv comment14 pages, 11 figures, accepted for publication on MNRAS

References in corpus (44)

• The Gaia mission
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• A 2.4% Determination of the Local Value of the Hubble Constant
• Color Transformations for the 2MASS Second Incremental Data Release
• The VMC Survey - I. Strategy and First Data
• Bump Cepheids in the Magellanic Clouds: Metallicities, the Distances to the LMC and SMC, and the Pulsation-Evolution Mass Discrepancy
• The influence of chemical composition on the properties of Cepheid stars. II-The iron content
• Age Determination of Six Intermediate-age SMC Star Clusters with HST/ACS
• New Optical Reddening Maps of the Large and Small Magellanic Clouds
• Intermediate-mass star models with different helium and metal contents
• Insights into the Cepheid distance scale
• Calibration of the MACHO Photometry Database
• Clustering of Local Group distances: publication bias or correlated measurements? III. The Small Magellanic Cloud
• Theoretical Models for Classical Cepheids: II. Period-Luminosity, Period-Color and Period-Luminosity-Color Relations
• Depth estimation of the Large and Small Magellanic Clouds
• Cepheid Calibration of the Peak Brightness of SNe Ia. XI. SN 1998aq in NGC 3982
• Cepheid pulsation models at varying metallicity and DY/DZ
• Pulsation and evolutionary masses of classical Cepheids. I. Milky Way variables
• On the Enhancement of Mass Loss in Cepheids Due to Radial Pulsation
• Theoretical models for Bump Cepheids
• The VMC Survey. V. First results for Classical Cepheids
• New near-infrared period-luminosity-metallicity relations for RR Lyrae stars and the outlook for Gaia
• The VMC Survey. XIII. Type II Cepheids in the Large Magellanic Cloud
• Cepheid theoretical models and observations in HST/WFC3 filters: the effect on the Hubble constant Ho
• Improving the mass determination of Galactic Cepheids
• On the evolutionary and pulsation mass of Classical Cepheids: III. the case of the eclipsing binary Cepheid CEP0227 in the Large Magellanic Cloud
• The Eclipsing Binary Cepheid OGLE-LMC-CEP-0227 in the Large Magellanic Cloud: pulsation modelling of light and radial velocity curves
• Uncertainties on the theoretical predictions for classical Cepheid pulsational quantities
• A Classical Cepheid in a LMC eclipsing binary: evidence of shortcomings in current stellar evolutionary models?
• The VMC Survey - X. Cepheids, RR Lyrae stars and binaries as probes of the Magellanic System's structure
• A delta Scuti distance to the Large Magellanic Cloud
• The VMC Survey. VIII. First results for Anomalous Cepheids
• The VMC Survey. XIX. Classical Cepheids in the Small Magellanic Cloud
• A "pulsational" distance determination for the Large Magellanic Cloud
• Theoretical fits of the δCephei light, radius and radial velocity curves
• Theoretical fit of Cepheid light an radial velocity curves in the Large Magellanic Cloud cluster NGC 1866
• CORS Baade-Wesselink method in the Walraven photometric system: the Period-Radius and the Period-Luminosity relation of Classical Cepheids
• BVRIJK light curves and radial velocity curves for selected Magellanic Cloud Cepheids
• Preliminary results for RR Lyrae stars and Classical Cepheids from the Vista Magellanic Cloud (VMC) Survey
• CORS Baade-Wesselink distance to the LMC NGC 1866 blue populous cluster
• The Secret Lives of Cepheids: Evolution, Mass Loss, and Ultraviolet Emission of the Long-Period Classical Cepheid $l$ Carinae
• The VMC Survey - XX. Identification of new Cepheids in the Small Magellanic Cloud
• The Cepheids of NGC1866: A Precise Benchmark for the Extragalactic Distance Scale and Stellar Evolution from Modern UBVI Photometry

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• The VMC survey -- LIII. Data release #7. Complete survey data and data from additional programmes
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• Ultra Long Period Cepheids as standard candles from Gaia to Rubin-LSST
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