Evidence is presented indicating that the young star cluster Westerlund~2 lies d⊙∼3.0 kpc in the direction of Carina. The distance is tied partly to new UBVRIc photometry and revised spectral classifications for cluster stars, which imply that dust in the direction of Carina is characterized by an anomalous extinction law (RV∼3.8). That result was determined from a multi-faceted approach relying on the variable-extinction and color excess methods.
@article{arxiv.1209.2080,
title = {The distance to the young open cluster Westerlund 2},
author = {Giovanni Carraro and David Turner and Daniel Majaess and Gustavo Baume},
journal= {arXiv preprint arXiv:1209.2080},
year = {2012}
}
Comments
4 pages, 4 eps figure, proceedings of IAU Symposium 289, Beijing, August 2012