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Blanco DECam Bulge Survey (BDBS): VI. extinction maps toward southern Galactic bulge globular clusters

We present wide-field, high resolution maps of the color excess for 14 globular clusters toward the Southern Galactic bulge. The maps were derived using Gaia EDR3 astrometry and stellar photometry from the Blanco DECam Bulge Survey, which is a deep, wide-field ugrizY photometric survey of the southe...

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Main Authors: Kader, Justin A. (Author) , Pilachowski, Catherine A. (Author) , Johnson, Christian I. (Author) , Rich, R. Michael (Author) , Young, Michael D. (Author) , Simion, Iulia T. (Author) , Clarkson, William I. (Author) , Michael, Scott (Author) , Kunder, Andrea (Author) , Vivas, Anna Katherina (Author) , Koch-Hansen, Andreas (Author) , Marchetti, Tommaso (Author)
Format: Article (Journal)
Language:English
Published: 2023 June 15
In: The astrophysical journal
Year: 2023, Volume: 950, Issue: 2, Pages: 1-20
ISSN:1538-4357
DOI:10.3847/1538-4357/acc79e
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-4357/acc79e
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.3847/1538-4357/acc79e
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Author Notes:Justin A. Kader, Catherine A. Pilachowski, Christian I. Johnson, R. Michael Rich, Michael D. Young, Iulia T. Simion, William I. Clarkson, Scott Michael, Andrea Kunder, Anna Katherina Vivas, Andreas J. Koch-Hansen, and Tommaso Marchetti
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Summary:We present wide-field, high resolution maps of the color excess for 14 globular clusters toward the Southern Galactic bulge. The maps were derived using Gaia EDR3 astrometry and stellar photometry from the Blanco DECam Bulge Survey, which is a deep, wide-field ugrizY photometric survey of the southern Galactic bulge. Comparisons with WISE 12 μm images of thermal continuum emission demonstrate that the maps presented here trace interstellar extinction by dust down to 5″ scales. We use the reddening-corrected photometry of proper motion-selected cluster stars to build color-magnitude diagrams for the target globular clusters, which show residual broadening in excess of that expected from the photometric errors alone. This residual broadening is likely to be driven by star-to-star elemental abundance variations.
Item Description:Gesehen am 28.09.2023
Physical Description:Online Resource
ISSN:1538-4357
DOI:10.3847/1538-4357/acc79e

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