Supplementary information

Supplementary Figures 1-4 and Legends

Supplementary Figure 1: The Arches cluster, as imaged in infrared light with the Hubble Space Telescope Near-Infrared Camera and Multi-object Spectrometer. Supplementary Figure 2: Luminosity versus temperature for massive stars. Supplementary Figure 3: Present versus initial mass for massive stars at a variety of ages. Supplementary Figure 4: Results of Monte-Carlo simulation.

Supplementary Figures 1-4 and Legends - Download Word file (745KB)