A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
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...…interestingly, Sánchez-Blázquez et al. (2014) have investigated the relation of stellar metallicity gradients on the presence and strength of stellar bars, finding no evidence for any correlation (in agreement with similar studies tracing the gas metallicity gradients, see Sánchez et al., 2014)....
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...However, both Sánchez et al. (2014) and Ho et al. (2015) have pointed out that the spread is greatly reduced, and metallicity gradients become comparable, if the radii are normalized to the galaxy effective radius (Re), suggesting that the chemical evolution of galaxies with different masses is…...
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...By using spatially resolved spectroscopic data from a sample of 306 star forming discs from the CALIFA survey, Sánchez et al. (2014) found a large spread of metallicity gradients....
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...33, and through the stacking of large sample of galaxies (Sánchez et al., 2014)....
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References
11,704 citations
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...Throughout, we adopted the Cardelli et al. (1989) law for the stellar dust attenuation with an specific attenuation of RV = 3.1, assuming a simple screen distribution....
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...In most cases these ratios distingusih well between strong ionization sources, such as classical H ii regions and powerful AGNs (e.g., Baldwin et al. 1981)....
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...The most common diagnostic diagram in the literature for the optical regime is the one that makes use of easily observed strong lines that are less affected by dust attenuation, i.e., [O iii]/Hβ vs. [N ii]/Hα (Baldwin et al. 1981)....
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...They are frequently selected on the basis of demarcation lines defined in the so-called diagnostic diagrams (e.g., Baldwin et al. 1981; Veilleux & Osterbrock 1987), which compare different line ratios, such as [OIII]/Hβ vs. [NII]/Hα, [OIII]/Hβ vs. [OII]/Hα, [NII]/Hα vs. [SII]/Hα or [NII]/Hα vs.…...
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