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The distance to the young open cluster Westerlund 2

by: Giovanni Carraro, David Turner, Daniel Majaess, Gustavo Baume
(10 Sep 2012)  Key: citeulike:11223400

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Abstract

Evidence is presented indicating that the young star cluster Westerlund~2 lies $d_odot∼3.0$ kpc in the direction of Carina. The distance is tied partly to new $UBVRI_c$ photometry and revised spectral classifications for cluster stars, which imply that dust in the direction of Carina is characterized by an anomalous extinction law ($R_V∼3.8$). That result was determined from a multi-faceted approach relying on the variable-extinction and color excess methods.


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