MDR was supported by an American Astronomical Society Small Research Grant and the National Science Foundation Grant AST007480. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the American Astronomical Society or the National Science Foundation. MDR would also like to thank Conny Aerts and a HELAS travel grant which allowed us to congregate in Leuven to work on atmospheric models. JRE, SLH, and RLVW were supported by the Missouri Space Grant Consortium and an REU Supplement grant from the National Science Foundation. R.[Ø]{}. is supported by the Research Council of the University of Leuven and the FP6 Coordination Action HELAS of the EU.

Some of the data presented here have been taken using[alfosc]{}, which is owned by the Instituo de Astrofisica de Andalucia (IAA) and operated at the Nordic Optical Telescope under agreement between IAA and the NBIfAFG of the Astronomical Observatory of Copenhagen.

Based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.

AArefs.tex

[^1]: Visiting Astronomer, Kitt Peak National Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under cooperative agreement with the National Science Foundation.

[^2]: Based on observations from the Nordic Optical Telescope, Kitt Peak National Observatory, and MDM Observatory.
