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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28992
Title: Homogeneous photometry - VII. Globular clusters in the Gaia era
Authors: Stetson, P. B.
PANCINO, ELENA 
Zocchi, A.
SANNA, Nicoletta 
Monelli, M.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 485
Issue: 3
First Page: 3042
Abstract: We present wide-field, ground-based Johnson-Cousins UBVRI photometry for 48 Galactic globular clusters based on about 90 000 public and proprietary images. The photometry is calibrated with the latest transformations obtained in the framework of our secondary standard project, with typical internal and external uncertainties of order a few millimagnitudes. These data provide a bridge between existing small-area, high-precision HST photometry and all sky catalogues from large surveys like Gaia, SDSS, or LSST. For many clusters, we present the first publicly available photometry in some of the five bands (typically U and R). We illustrate the scientific potential of the photometry with examples of surface density and brightness profiles and of colour-magnitude diagrams, with the following highlights: (i) we study the morphology of NGC 5904, finding a varying ellipticity and position angle as a function of radial distance; (ii) we show U-based colour-magnitude diagrams and demonstrate that no cluster in our sample is free from multiple stellar populations, with the possible exception of a few clusters with high and differential reddening or field contamination, for which more sophisticated investigations are required. This is true even for NGC 5694 and Terzan 8 that were previously considered as (mostly) single-population candidates.
URI: http://hdl.handle.net/20.500.12386/28992
URL: https://academic.oup.com/mnras/article/485/3/3042/5368364
ISSN: 0035-8711
DOI: 10.1093/mnras/stz585
Bibcode ADS: 2019MNRAS.485.3042S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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1902.09925.pdfpostprint14.04 MBAdobe PDFView/Open
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