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The VMC survey is obtaining multi-epoch photometry in the Ks band of the Magellanic System down to a limiting magnitude of Ks ~ 19.3 for individual epoch data. The observations are spaced in time such as to provide optimal sampling of the…

Distance to the Large Magellanic Cloud (LMC) is determined using the Cepheid variables in the LMC. We combine the individual LMC Cepheid distances obtained from the infrared surface brightness method and a dataset with a large number of LMC…

Astrophysics · Physics 2015-05-13 C. Ngeow , S. Kanbur

(abridged) In this study, we constructed spectral energy distributions (SEDs) for a sample of 142 LMC and 77 SMC fundamental-mode classical Cepheids (CCs) using photometric data from the literature. When possible, the data were taken to be…

Solar and Stellar Astrophysics · Physics 2023-08-23 Martin Groenewegen , Jan Lub

This is an investigation of the period-luminosity relation of classical Cepheids in samples of different metallicity. It is based on 481 Cepheids in the Large and Small Magellanic Clouds from the blue and red filter CCD observations (most…

We present a realization of the maximum-likelihood (ML) technique, which is one of the latest modifications of the Baade--Becker--Wesselink (BBW) method. Our approach is based on non-linear calibrations of the effective temperature and…

Solar and Stellar Astrophysics · Physics 2020-10-06 Yaroslav Lazovik , Alexey Rastorguev

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}),…

Solar and Stellar Astrophysics · Physics 2015-01-21 Anupam Bhardwaj , Shashi M. Kanbur , Harinder P. Singh , Lucas M. Macri , Chow-Choong Ngeow

We present V and I_c CCD photometry for 40 LMC Cepheids at 1 to 3 epochs. This represents a significant increase in the number of LMC Cepheids with $I$-band data, and, as we show, is a useful addition to the sample which can be used to…

Astrophysics · Physics 2009-10-31 N. R. Tanvir , A. Boyle

We use data on variable stars from the Optical Gravitational Lensing Experiment (OGLE III) survey to determine the three-dimensional structure of the Small Magellanic Cloud (SMC). Deriving individual distances to RR Lyrae stars and Cepheids…

Astrophysics of Galaxies · Physics 2015-06-11 Raoul Haschke , Eva K. Grebel , Sonia Duffau

A sample of 37 Galactic, 10 LMC and 6 SMC cepheids is compiled for which individual metallicity estimates exist and BVIK photometry in almost all cases. The Galactic cepheids all have an individual distance estimate available. For the MC…

Astrophysics · Physics 2009-11-10 M. A. T. Groenewegen , M. Romaniello , F. Primas , M. Mottini

The extragalactic distance scale builds directly on the Cepheid Period-Luminosity (PL) relation as delineated by the sample of Cepheids in the Large Magellanic Cloud (LMC). However, the LMC is a dwarf irregular galaxy, quite different from…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 J. Storm , W. Gieren , P. Fouque , T. G. Barnes , I. Soszynski , G. Pietrzynski , N. Nardetto , D. Queloz

We present the results of a comprehensive theoretical investigation on the Period-Radius (PR) relation of classical Cepheids based on new sequences of full amplitude, nonlinear convective models constructed by adopting a wide range of both…

Astrophysics · Physics 2007-05-23 Bono Giuseppe , Caputo Filippina , Marconi Marcella

We present the results of a theoretical investigation aimed at testing whether full amplitude, nonlinear, convective models account for the I-band light curves of Bump Cepheids in the Large Magellanic Cloud (LMC). We selected two objects…

Astrophysics · Physics 2009-11-07 G. Bono , V. Castellani , M. Marconi

Period-luminosity relations of long period variables (LPVs) are a powerful tool to map the distances of stars in our galaxy, and are typically calibrated using stars in the Large Magellanic Cloud (LMC). Recent results demonstrated that…

Astrophysics of Galaxies · Physics 2025-03-11 Daniel Hey , John Tonry , Benjamin Shappee , Daniel Huber

We present the first gri-band period-luminosity (PL) and period-Wesenheit (PW) relations for 37 Type II Cepheids (hereafter TIIC) located in 18 globular clusters based on photometric data from the Zwicky Transient Facility. We also updated…

Thirty eight long-period (P>10 days), apparently contact binary stars discovered by the OGLE-II project in the SMC appear to be Beta Lyrae-type systems with ellipsoidal variations of the cool components dominating over eclipse effects in…

Astrophysics · Physics 2009-10-31 Slavek M. Rucinski , Carla Maceroni

This work describes the analysis of 64 early-type, massive contact or near-contact eclipsing systems from the Large Magellanic Cloud discovered by the OGLE-III survey. It presents the determination of the period-luminosity-colour relation…

Solar and Stellar Astrophysics · Physics 2016-02-17 Michal Pawlak

In this paper we present a catalogue of the Fourier parameters for the light curves of Large Magellanic Cloud fundamental mode Cepheids in the OGLE database. These Fourier parameters are obtained with a simulated annealing method. The…

Astrophysics · Physics 2007-05-23 C. C. Ngeow , S. Kanbur

We present measurements of 68 classical Cepheids with periods from 10 to 78 days observed in the near-infrared by the PHAT Program using the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST). The combination of HST's resolution…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Adam G. Riess , Juergen Fliri , David Valls-Gabaud

We describe variable stars found in the data collected during the OGLE-III Shallow Survey covering the I-band magnitude range from 9.7 mag to 14.5 mag. The main result is the extension of period--luminosity relations for Cepheids up to 134…

We examine the properties of 17 long period (80-180 days) and very luminous (median absolute magnitude of M_I= -7.93 and M_V= -7.03) Cepheids to see if they can serve as an useful distance indicator. We find that these Ultra Long Period…

Astrophysics · Physics 2011-02-11 Jonathan C. Bird , K. Z. Stanek , Jose L. Prieto