The bends in the slopes of radial abundance gradients in the disks of spiral galaxies - Do they exist?
Abstract
Spiral galaxies with a reported bend in the slope of gradient in the oxygen abundances (O/H)R_23, derived with traditionally used R23-method, were examined. It is shown that the artificial origin of the reported bends can be naturally explained. Two situations that result in a false bend in the slope of (O/H)R_23 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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2003
- DOI:
- Bibcode:
- 2003A&A...397..109P
- Keywords:
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- galaxies: abundances;
- galaxies: ISM;
- galaxies: spiral