Image Details
Caption: Figure 8.
The spectra of five M31 young clusters in the wavelength range between 4800 Å and 5100 Å. To enhance the visibility of the emission lines, the spectrum of a template young cluster been subtracted from each object; in some cases, a mismatch in age has resulted in a poor subtraction around Hβ. The y-axis represents counts; to convert to relative flux, note that the response at Hβ is roughly 1.46 times less than that at [O iii] λ5007. For each candidate, the [O iii] line is at least twice the strength of Hβ.
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