Stars: variables: RR Lyrae
Top PDF Stars: variables: RR Lyrae:
On the RR Lyrae Stars in Globulars V the Complete Near infrared (JHK s) Census of ω Centauri RR Lyrae Variables
... display that they are mainly concentrated in the transition between RRc and RRab, as recently suggested by Braga et al. ( 2016 ) . This fi nding supports previous results by Jurcsik et al. ( 2011 ) concerning Blazhko RRLs ...
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Variable stars in large magellanic cloud globular clusters I NGC 1466
... of RR Lyrae stars. RR Lyrae stars were first found in NGC 1466 by Thackeray & Wesselink (1953), and additional RR Lyrae were discovered by Wesselink ...of ...
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The Leo IV dwarf spheroidal galaxy: color magnitude diagram and pulsating stars
... RRab stars, P ab = ...RRab stars fall close to the locus of Oo I systems (from Clement & Rowe 2000), with V1 and V3 lying near the distribution of the bona fide regular variables, and V2 lying ...
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Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane
... VISTA Variables in the Vía Láctea ( VVV ) Survey were used to search for RR Lyrae stars in the Southern Galactic ...404 RR Lyrae of type ab stars was identi fi ed across a ...
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The Globular Cluster NGC 6402 (M14) II Variable Stars
... variable stars. We identified 130 variables, 8 of which are new ...ab-type RR Lyrae stars, 54 c-type RR Lyrae, 6 type II Cepheids, 1 W UMa star, 1 detached eclipsing ...
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A deep near infrared view of the Galactic globular cluster 2 MASS GC 02
... these stars could in principle also be field RR Lyrae ...RRab stars (see below) are extremely unusual for field RR Lyrae of moderately high metal- licity, but not so for ...
7
RR Lyrae Stars in the Globular Cluster NGC 6101
... identified potential small-amplitude red variable (SARV) or eclipsing binary as well as updating the periods and reclassifying two RR Lyrae variables. We also provide a longer timebase ( E 9 months, ...
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The Horizontal Branch of NGC 1851: Constraints from its RR Lyrae Variables
... Especially following the detection of two distinct subgiant branches (SGBs) in the color–magnitude diagram (CMD) of NGC 1851 (Milone et al. 2008), attempts to piece together the formation history of this cluster have ...
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Structure of the obscured galactic disk with pulsating variables
... the RR Lyrae variable population of the VVV disk fields, inspection of the light-curves and fits made by the PyFiNeR revealed inconsistencies between the H -band ...individual RR Lyrae ...
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New RR Lyrae variables in binary systems
... RRL stars should decrease with increasing metallicity, with little scatter at any given [Fe/H] ...(RRd) stars. RRd stars are observed to pulsate simultaneously in the fundamental and first overtone ...
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Deep census of variable stars in a VLT/VIMOS field in Carina
... Variable stars provide important information about the nature and evolution of stars in various regions of our ...binary stars provide us information about the masses and radii of stars (see ...
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Variable stars in large magellanic cloud globular clusters II NGC 1786
... variable stars in Large Magellanic Cloud globular ...how RR Lyrae stars in Oosterhoff-intermediate systems compare to their counterparts in Oosterhoff I/II ...variable stars were ...
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The Globular Cluster NGC 5286 II Variable Stars
... for stars to cluster tightly around either Oosterhoff reference line, particularly in the B ...the variables studied in this paper can be found (see Figure ...variable stars in the innermost cluster ...
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On a New Theoretical Framework for RR Lyrae Stars II Mid infrared Period Luminosity Metallicity Relations
... ) variables are a popular tracer for old stellar populations, thanks to their abundance in the globular clusters, halos, and bulges of galaxies ( see ...intermediate-mass stars cross the so-called Cepheid ...
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A Data driven Study of RR Lyrae Near IR Light Curves: Principal Component Analysis, Robust Fits, and Metallicity Estimates
... of variables by an orthogonal transformation into a new set of linearly uncorrelated variables called principal components ( PCs ) ...of stars, ...
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Chemical Compositions of Field and Globular Cluster RR Lyrae Stars I NGC 3201
... et al. ( 1986, 1990 ) that RRLs have near-infrared, period – luminosity correlations. More recent empirical and theoretical evidence indicate that in the near-infrared ( NIR ) they obey period – luminosity – metallicity ...
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Unmixing the Galactic halo with RR Lyrae tagging
... of RR Lyrae in the period– amplitude space as described above, we put forward a simple ob- servational diagnostic for the genesis of the Galactic field halo ...RRab stars of a particular Oosterhoff ...
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On the Impact of Helium Content on the RR Lyrae Distance Scale
... ( iii ) Evolutionary timescale to approach the IS: The increase in helium content causes, at fi xed metallicity, a steady decrease in the evolutionary timescale required to approach the IS. This effect is more severe in ...
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Variable stars in the fornax dsph galaxy I The globular cluster fornax 4
... particular, adopting a metallicity of ½Fe/ H ¼ 1:5 according to Strader et al. (2003) would place For 4 right in the middle of the Oo-Int band in the [Fe/ H] Y HB type diagram (see Fig. 8 in Catelan 2007a), whereas ...
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Supervised detection of anomalous light curves in massive astronomical catalogs
... interesting sources since they show strong optical variability, either periodic or non-periodic and X-ray emission simultaneously. They could be either W UMa- type contact binaries, X-ray binaries, or other types of ...
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