Ragosta, F, Marconi, M, Molinaro, R, Ripepi, V, Cioni, MRL, Moretti, MI, Groenewegen, MAT, Choudhury, S, de Grijs, R, van Loon, JT, Oliveira, JM, Ivanov, VD and Gonzalez-Fernandez, C (2019) The VMC Survey - XXXV. Model fitting of LMC Cepheid light curves. Monthly Notices of the Royal Astronomical Society, 490 (4). pp. 4975-4984. ISSN 0035-8711

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We present the results of the light curve model fitting technique applied to optical and near-infrared photometric data for a sample of 18 Classical Cepheids (11 fundamentals and 7 first overtones) in the Large Magellanic Cloud (LMC). We use optical photometry from the OGLE III database and near–infrared photometry obtained by the European Southern Observatory public survey “VISTA near–infrared survey of the Magellanic Clouds system”. Iso–periodic nonlinear convective model sequences have been computed for each selected Cepheid in order to reproduce the multi–filter light curve amplitudes and shape details. The inferred individual distances provide an intrinsic weighted mean value for the LMC distance modulus of μ0 = 18.56 mag with a standard deviation of 0.13 mag. We derive also the Period–Radius, the Period–Luminosity and the Period–Wesenheit relations that are consistent with similar relations in the literature. The intrinsic masses and luminosities of the best–fitting models show that all the investigated pulsators are brighter than the predictions of the canonical evolutionary mass–luminosity relation, suggesting a significant efficiency of non–canonical phenomena, such as overshooting, mass loss and/or rotation.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2019 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: stars: variables: Cepheids – stars: oscillations – galaxies: Magellanic Clouds – galaxies: structure
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 17 Oct 2019 10:58
Last Modified: 23 Mar 2021 09:35
URI: https://eprints.keele.ac.uk/id/eprint/7039

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