Fig. 1.
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BPT diagnostic diagram for CO-VG galaxies (left) and CO-CS galaxies (right). Blue points represent star-forming galaxies, green points represent composite galaxies, and red points represent AGN galaxies. The dashed line represents the demarcation proposed by Kewley et al. (2001), while the solid line corresponds to the curve introduced by Kauffmann et al. (2003a).
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