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

Bibcode
2005RMxAC..24..243G
García-Rojas, J.; Esteban, C.; Peimbert, A.; Peimbert, M.; Simon-Díaz, S.; Rodríguez, M.; Ruiz, M. T.; Herrero, A.
Bibliographical reference

II International GTC Workshop: Science with GTC 1st-light Instruments and the LMT (Eds. A. M. Hidalgo-Gámez, J. J. González, J. M. Rodríguez Espinosa, and S. Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 24, pp. 243-244 (2005) (http://www.astroscu.unam.mx/~rmaa/)

Advertised on:
12
2005
Number of authors
8
IAC number of authors
0
Citations
1
Refereed citations
1
Description
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.
Type
Non-refereed
Galaxies
Star formation

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