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相关论文: A Comparative Study of Multiwavelength Theoretical…

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We present a comparative analysis of theoretical and observed light curves of Cepheid variables using Fourier decomposition. The theoretical light curves at multiple wavelengths are generated using stellar pulsation models for chemical…

太阳与恒星天体物理 · 物理学 2017-09-13 Anupam Bhardwaj , Shashi M. Kanbur , Marcella Marconi , Marina Rejkuba , Harinder P. Singh , Chow-Choong Ngeow

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}),…

太阳与恒星天体物理 · 物理学 2015-01-21 Anupam Bhardwaj , Shashi M. Kanbur , Harinder P. Singh , Lucas M. Macri , Chow-Choong Ngeow

We present results from a detailed analysis of theoretical and observed light curves of classical Cepheid variables in the Galaxy and the Magellanic Clouds. Theoretical light curves of Cepheid variables are based on non-linear convective…

星系天体物理 · 物理学 2019-09-04 A. Bhardwaj , S. M. Kanbur , M. Marconi , H. P. Singh , M. Rejkuba , C. -C. Ngeow

We present results from a comparative study of light curves of Cepheid and RR Lyrae stars in the Galaxy and the Magellanic Clouds with their theoretical models generated from the stellar pulsation codes. Fourier decomposition method is used…

太阳与恒星天体物理 · 物理学 2019-04-18 Harinder P. Singh , Susmita Das , Anupam Bhardwaj , Shashi Kanbur , Marcella Marconi

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…

太阳与恒星天体物理 · 物理学 2023-03-29 Kerdaris Kurbah , Sukanta Deb , Shashi M. Kanbur , Susmita Das , Mami Deka , Anupam Bhardwaj , Hugh Riley Randall , Selim Kalici

We discuss time-series analyses of classical Cepheid and RR Lyrae variables in the Galaxy and the Magellanic Clouds at multiple wavelengths. We adopt the Fourier decomposition method to quantify the structural changes in the light curves of…

太阳与恒星天体物理 · 物理学 2018-10-18 A. Bhardwaj , S. M. Kanbur , M. Marconi , S. Das , E. P. Bellinger , H. P. Singh , M. Rejkuba , C. -C. Ngeow

We show how Principal Component Analysis can be used to analyse the structure of Cepheid light curves. This method is more efficient than Fourier analysis at bringing out changes in light curve shape as a function of period. Using this…

天体物理学 · 物理学 2009-11-07 S. M. Kanbur , D. Iono , N. R. Tanvir , M. A. Hendry

We analyze Galactic, Large Magellanic Cloud and Small Magellanic Cloud Cepheids and RR Lyrae variables in terms of period-color (PC) and amplitude-color (AC) diagrams at the phases of maximum and minimum light. We compiled Galactic Cepheids…

太阳与恒星天体物理 · 物理学 2015-06-22 Anupam Bhardwaj , Shashi M. Kanbur , Harinder P. Singh , Chow-Choong Ngeow

We present the results of an extensive theoretical investigation on the pulsation behavior of Bump Cepheids. We constructed several sequences of full amplitude, nonlinear, convective models by adopting a chemical composition typical of…

天体物理学 · 物理学 2007-05-23 G. Bono , M. Marconi , R. F. Stellingwerf

We present the first extensive and detailed theoretical scenario for the interpretation of Cepheid properties observed in the SDSS filters. Three sets of nonlinear convective pulsation models, corresponding to the chemical compositions of…

太阳与恒星天体物理 · 物理学 2015-06-11 Marcella Di Criscienzo , Marcella Marconi , Ilaria Musella , Michele Cignoni , Vincenzo Ripepi

We present a detailed statistical analysis of possible non-linearities in the Period-Luminosity (P-L), Period-Wesenheit (P-W) and Period-Color (P-C) relations for Cepheid variables in the LMC at optical ($VI$) and near-infrared ($JHK_{s}$)…

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…

天体物理学 · 物理学 2009-11-07 G. Bono , V. Castellani , M. Marconi

We present a detailed light curve analysis of RR Lyrae variables at multiple wavelengths using Fourier decomposition method. The time-series data for RR Lyrae variables in the Galactic bulge and the Magellanic Clouds are taken from the…

太阳与恒星天体物理 · 物理学 2018-10-05 Susmita Das , Anupam Bhardwaj , Shashi M. Kanbur , Harinder P. Singh , Marcella Marconi

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…

Period-colour (PC) and amplitude-colour (AC) relations at maximum, mean and minimum light are constructed from a large grid of full amplitude hydrodynamic models of Cepheids with a composition appropriate for the SMC (Small Magellanic…

天体物理学 · 物理学 2019-08-19 S. Kanbur , C. Ngeow , G. Feiden

We present a detailed analysis of the light curves and pulsation properties of First Overtone (FO) Cepheids in the Magellanic Clouds (MCs) obtained using observations and predictions from stellar pulsation models. Multiwavelength…

星系天体物理 · 物理学 2025-06-19 Kerdaris Kurbah , Shashi M. Kanbur , Sukanta Deb , Anupam Bhardwaj , Mami Deka , Susmita Das , Gautam Bhuyan

The period of pulsation and the structure of the light curve for Cepheid and RR Lyrae variables depend on the fundamental parameters of the star: mass, radius, luminosity, and effective temperature. Here we train artificial neural networks…

太阳与恒星天体物理 · 物理学 2020-01-08 Earl P. Bellinger , Shashi M. Kanbur , Anupam Bhardwaj , Marcella Marconi

We present a technique for decomposing Cepheid light curves into their fundamental constituent parts; that is, their radius and temperature variations. We demonstrate that any given pair of optical luminosity and color curves can be used to…

太阳与恒星天体物理 · 物理学 2015-05-19 Wendy L. Freedman , Barry F. Madore

We present time-series observations of Population \rom{2} Cepheids in the Large Magellanic Cloud at near-infrared ($JHK_s$) wavelengths. Our sample consists of 81 variables with accurate periods and optical ($VI$) magnitudes from the OGLE…

太阳与恒星天体物理 · 物理学 2017-03-22 Anupam Bhardwaj , Lucas M. Macri , Marina Rejkuba , Shashi M. Kanbur , Chow-Choong Ngeow , Harinder P. Singh

We present results from the Large Magellanic Cloud Near-infrared Synoptic Survey (LMCNISS) for classical and type II Cepheid variables that were identified by the Optical Gravitational Lensing Experiment (OGLE-III) catalogue.…

太阳与恒星天体物理 · 物理学 2019-09-04 A. Bhardwaj , L. M. Macri , S. M. Kanbur , C. -C. Ngeow , H. P. Singh
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