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Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000347219> ?p ?o ?g. }

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• W2000347219 abstract "We present a catalog of 1888 fundamental-mode RR Lyrae stars detected in the Galactic bulge fields of the second phase of the Optical Gravitational Lensing Experiment (OGLE). The catalog includes basic parameters of the light curves, identifications of Blazhko frequencies, V - I colors at minimum light (for most stars), and other information for each star. We detect a high rate of incidence of the Blazhko phenomenon (at least 27.6%), including unprecedentedly many frequency triplets, which we attribute to our sensitive search method. We find that the minimum light V - I color (useful as a reddening indicator) grows slowly redder with increasing period and exhibits a star-to-star scatter of approximately 0.07 mag. We use this color to evaluate the zero-point accuracy of the reddening map of the Galactic bulge derived from OGLE data and find that in addition to low-level random errors or resolution effects (responsible for much of the scatter), the map may systematically overrepresent E(V - I) by approximately 0.05 mag in most fields. We present reasonably robust evidence that the RR Lyrae-to-red clump color separation is larger by 0.05-0.08 mag in the bulge than locally, which argues for caution in the use of these stars for reddening determinations. We consider the RR Lyrae constraint on the Galactocentric distance, but uncertainty about the absolute magnitude calibration leaves significant flexibility in the result. In contrast to previous results, we robustly detect the signature of the Galactic bar in the RR Lyrae population within the inner ±3° of longitude, and we highlight the apparent differences between the structures traced by the red clump giants and the more metal-poor RR Lyrae stars." @default.
• W2000347219 created "2016-06-24" @default.
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• W2000347219 date "2006-11-01" @default.
• W2000347219 modified "2023-09-25" @default.
• W2000347219 title "Catalog of Fundamental‐Mode RR Lyrae Stars in the Galactic Bulge from the Optical Gravitational Lensing Experiment" @default.
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• W2000347219 doi "https://doi.org/10.1086/507407" @default.
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