Abstract
We use laser guide star adaptive optics (LGS/AO) on the 10 m Keck II telescope to obtain high spatial resolution images of young massive clusters (YMCs) in NGC1569 and M82. These data probe YMC structure and the relation of the YMCs to the ambient field star population. The higher resolution of Keck LGS/AO relative to Hubble Space Telescope/NICMOS in the near-infrared enables us to examine whether YMCs are monolithic or hierarchical assemblies. The new integral-field spectrometer OSIRIS operating behind LGS/AO can trace the distribution of massive evolved stars within a cluster and reveal the nature of mass segregation.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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McCrady, N. Probing young massive clusters with laser guide star adaptive optics. Astrophys Space Sci 324, 109–112 (2009). https://doi.org/10.1007/s10509-009-0097-4
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DOI: https://doi.org/10.1007/s10509-009-0097-4