PI: Letizia Stanghellini, NOAO, email@example.com
Address: PO Box 26732, 950 North Cherry Avenue, Tucson, AZ 85726-6732, USA
CoI: Laura Magrini, Arcetri Observatory
CoI: Viviana Casasola, Istituto di Radioastronomia INAF
Title: Chemical evolution of two Sculptor galaxies through the abundances of planetary nebulae and H II regions
Abstract: In the context of detecting radial metallicity gradients in spiral galaxies to constraint the chemical evolutionary models we propose to perform MOS spectroscopy on two Sculptor galaxies, NGC 247 and NGC 7793, to detect the emission-line spectra of their planetary nebula (PN) and H II region populations. The contemporary studies of the two stellar populations will yield to chemical and time constraining of the galaxy formation and evolution models, with the PN abundances corresponding to the early stages of the galaxies, and the H II region ones carrying the information of the chemical evolution through out the galaxies lifetime. Metallicity gradients and chemical enrichment will be determined. PNe have not been detected before in these galaxies, thus the proposed observations will also yield to their PN luminosity function via the planned multi-filter pre-imaging.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360