The bends in the slopes of radial abundance gradients in the disks of spiral galaxies -- do they exist?

L. S. Pilyugin

doi:10.1023/a:1024013004321

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arXiv · astro-ph/0210385

The bends in the slopes of radial abundance gradients in the disks of spiral galaxies -- do they exist?

L. S. Pilyugin

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Abstract

Spiral galaxies with a reported bend in the slope of gradient in the oxygen abundances (O/H)_R23, derived with traditionally used R23 - method, were examined. It is shown that the artificial origin of the reported bends can be naturally explained. Two reasons that result in a false bend in the slope of (O/H)_R23 gradient are indicated. It is concluded that at the present time there is no example of a galaxy with an undisputable established bend in the slope of the oxygen abundance gradient.

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L. S. Pilyugin. 2002-10-17. The bends in the slopes of radial abundance gradients in the disks of spiral galaxies -- do they exist?. https://doi.org/10.1023/a%3A1024013004321

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