Diagnostic diagram of the apertures in the central kiloparsec of NGC 1672. The locations of the apertures are indicated in the flux maps in Fig. 3. The flux ratios of the H₂(1–0)S(1)λ2.122 μm/Brγ and [Fe II]λ1.644 μm/Brγ emission lines are used. The contours show the demarcation for young star formation, supernovae, and compact AGN; the solid lines denote upper limits for young star formation and AGN, both from Colina et al. (2015), derived using IFS data. The dashed lines denote upper limits for star formation and AGN activity (derived from slit-spectroscopy; Riffel et al. 2013b). An upper limit value for the [Fe II] flux was calculated for aperture 11.