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Starburst or Seyfert? Using Near-infrared Spectroscopy to Measure the Activity in Composite Galaxies

Hill, Tanya; Heisler, Charlene; Sutherland, Ralph; Hunstead, Richard


We present near-infrared spectra for a sample of galaxies with ambiguous optical emission-line ratios. These galaxies fall between starbursts and Seyferts in the usual optical diagnostic diagrams. We find a similar result with the near-infrared emission-line ratios, which suggests that the galaxies are composite, containing both a starburst and an AGN component. Furthermore, CO absorption, produced in late-type stars, is detected within the sample, although at a weaker level than is typical for...[Show more]

CollectionsANU Research Publications
Date published: 1999
Type: Journal article
Source: Astronomical Journal


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