Faint C and O recombination lines in H II regions and large telescopes: The case of S311

Details Faint C and O recombination lines in H II regions and large telescopes: The case of S311 Faint C and O recombination lines in H II regions and large telescopes: The case of S311

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rmxac..24..243g&link_type=abstract

II International GTC Workshop: Science with GTC 1st-light Instruments and the LMT (Eds. A. M. Hidalgo-Gámez, J. J. González, J.

Astronomy and Astrophysics

Astronomy

Galaxies: Evolution, Galaxies: Star Formation

Scientific paper

We present preliminary results on the analysis of very deep echelle UVES (8m VLT) spectra of the Galactic H II region S311 (NGC 2467) located outside the Solar circle. The data cover from 3100 to 10450 Å with a resolution R ~ 8800. We have detected and measured more than 300 emission lines, some of them are faint recombination lines of heavy-element ions. We have derived the O abundances from OI and OII recombination lines and the C abundance from CII lines and an Ionization Correction Factor (ICF). This kind of observations will permit us to derive the Galactic abundance gradient of C and O from nebular recombination lines, which are almost independent on the real temperature structure of the nebula.

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