Image Details
Caption: Figure 14.
Spectra of sources where the light is dominated by early-type stars. The spectra have been normalized to the continuum. Prominent Paschen line absorption is detected in all four sources, and the Paschen break is seen near 8200 Å. With the exception of p6-1, these objects have Hα in absorption. However, the spectra in the left panel illustrate how uncertainties in background subtraction can affect Hα characteristics, as the extremely deep Hα and [S II] lines in the spectrum of m10-4 are likely due to the oversubtraction of nebular emission lines. The depths of the Hα absorption lines may also be affected by Hα emission that is intrinsic to the sources.
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