Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Deras, D."'
We present a $VI$ CCD photometric study and a membership analysis of the globular cluster M56 (NGC 6779). This produced a decontaminated CMD from field stars, which enabled a better confrontation with theoretical isochrones; Zero-Age Horizontal Branc
Externí odkaz:
http://arxiv.org/abs/2202.09395
We present a CCD $VI$ photometric study of the globular cluster M14. Particular attention is given to the variable stars. This allowed new classifications and cluster membership considerations. New variables are reported; 3 RRc, 18 SR and 1 SX Phe. T
Externí odkaz:
http://arxiv.org/abs/2201.02160
We present an analysis of \emph{VI} CCD time-series photometry of the Oo II type globular cluster M92. The variable star population of the cluster is studied with the aim of revising their classifications, identifications, frequency spectra and to se
Externí odkaz:
http://arxiv.org/abs/2003.00087
Autor:
Deras, D., Ferro, A. Arellano, Lázaro, C., Fierro, I. H. Bustos, Calderón, J. H., Muneer, S., Giridhar, S.
We present an analysis of $\emph{VI}$ CCD time series photometry of globular cluster NGC 6712. Our main goal is to study the variable star population as indicators of the cluster mean physical parameters. We employed the Fourier decomposition of RR L
Externí odkaz:
http://arxiv.org/abs/2001.08306
Autor:
Deras, D., Ferro, A. Arellano, Lázaro, C., Fierro, I. H. Bustos, Calderón, J. H., Muneer, S., Giridhar, Sunetra
We present the results from $VI$ CCD time-series photometry of the globular cluster M13 (NGC 6205). From the Fourier decomposition of the light curves of RRab and RRc stars we found an average metallicity of [Fe/H]zw = -1.58 $\pm$ 0.09. The distance
Externí odkaz:
http://arxiv.org/abs/1903.01572
We present an analysis of VI CCD time-series photometry of the globular cluster NGC 6171. The main goal is to determine individual physical parameters for single-mode RR Lyrae stars present in the field of view of our images, by means of light curve
Externí odkaz:
http://arxiv.org/abs/1810.02388
Autor:
Ferro, A. Arellano, Rosenzweig, P., Luna, A., Deras, D., Muneer, S., Giridhar, S., Michel, R.
Based on photometric data obtained between 1935 and 2017, $O-C$ diagrams were built for 22 RR Lyrae stars in the globular cluster NGC 6171, leading to the discovery of secular period changes in 4 variables for which we have calculated their period ch
Externí odkaz:
http://arxiv.org/abs/1801.04347
Akademický článek
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Publikováno v:
Monthly Notices of the Royal Astronomical Society; Mar2022, Vol. 511 Issue 1, p1285-1302, 18p
Autor:
Deras, D., Ferro, A. Arellano, Lázaro, C., Fierro, I. H. Bustos, Calderón, J. H., Muneer, S., Giridhar, Sunetra
Publikováno v:
ASP Conference Series; 2020, Vol. 529, p179-183, 5p