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Temperature Structure and Metallicity in H II Regions
Mónica Rodríguez, Jorge García-Rojas
The metallicities implied by collisionally excited lines (CELs) of heavy elements in H II regions are systematically lower than those implied by recombination lines (RLs) by factor…
Chemical behavior of the Dwarf Irregular Galaxy NGC 6822. Its PN and HII region abundances
Liliana Hernandez-Martinez, Miriam Peña, Leticia Carigi +1
We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822 The selected objects are distributed in different zones of th…
Keck HIRES Spectroscopy of Extragalactic HII Regions: C and O Abundances from Recombination Lines
C. Esteban, F. Bresolin, M. Peimbert +3
We present very deep spectrophotometry of 14 bright extragalactic HII regions belonging to spiral, irregular, and blue compact galaxies. The data for 13 objects were taken with the…
Properties of the ionized gas in HH202. II: Results from echelle spectrophotometry with UVES
A. Mesa-Delgado, C. Esteban, J. García-Rojas +5
We present results of deep echelle spectrophotometry of the brightest knot of the HH202 in the Orion Nebula --HH202-S-- using the ultraviolet Visual Echelle Spectrograph (UVES). Th…