ИСТИНА

We consider the radial distribution of the effective yield of oxygen yeff corresponding to the closed box model found for the sample of 14 spiral galaxies with the measured radial distribution log(O/H)(R). We analyze the radial profiles yeff(R) and compare the maximal values yeff,max beyond the bulge region with the global parameters of galaxies. As the initial data for gas-phase abundance we used the O/H radial profiles from Moustakas, Kennicutt, Tremonti et al. (2010), based on two different calibrations (Pilyugin & Thuan 2005 (PT2005) and Kobulnicky & Kewley 2004 (KK2004) methods). In most of galaxies with the PT2005 calibration, which we consider as the preferred one, the effective yield yeff in the main disk (R ≥ 0.2 R25, where R25 is the optical radius) increases with radius, remaining lower than the empirically found true stellar yield yo. This may indicate the inflow of low-enriched gas predominantly to the inner disk regions, which reduces yeff. We show that yeff,max has a tendency to be lower for galaxies with low gas content and for those possessing relatively high dark halo mass or total mass within the optical radius.