The metallicity of circumnuclear star forming regions

Details The metallicity of circumnuclear star forming regions The metallicity of circumnuclear star forming regions

2006-10-26

arxiv.org/abs/astro-ph/0610787v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, Metal Rich Universe Conf

Scientific paper

We present a spectrophotometric study of circumnuclear star forming regions (CNSFR) in the early type spiral galaxies: NGC 2903, NGC 3351 and NGC 3504, all of them of over solar metallicity according to standard empirical calibrations. A detailed determination of their abundances is made after careful subtraction of the very prominent underlying stellar absorption. It is found that most regions show the highest abundances in HII region-like objects. The relative N/O and S/O abundances are discussed. In is also shown that CNSFR, as a class, segregate from the disk HII region family, clustering around smaller ``softness parameter" -- \eta' -- values, and therefore higher ionizing temperatures.

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