Ionization structure and chemical abundances of the Wolf-Rayet nebula NGC6888 with integral field spectroscopy

This work aims to search for the observational footprints of the interactions between the interstellar medium (ISM) and stellar winds in the Wolf-Rayet (WR) nebula NGC6888 in order to understand its ionization structure, chemical composition, and kinematics. We have collected a set of integral field spectroscopy observations across NGC6888, obtained with PPAK in the optical range performing both 2D and 1D analyses. Attending to the 2D analysis in the northeast part of NGC6888, we have generated maps of the extinction structure and electron density. We produced statistical frequency distributions of the radial velocity and diagnostic diagrams. We have found that the spectra of a localized region to the southwest of this pointing can be represented well by shock models. Furthermore, we performed a thorough study of integrated spectra in nine regions over the whole nebula. We derived electron densities ranging from
Accepted for publication in Section 6. of Astronomy and Astrophysics. The official date of acceptance is 22/02/2012. 18 pages, 15 figures and 4 tables