Intensity ratio maps of the south PDR of NGC 7023. The colors from the colorbar correspond to the ratio of the 11.2/3.3 μm ratio on the left and the 8.0/11.2 μm ratio on the right. In the top panels the contour lines follow the H2 emission (2.12 μm) from 90 to 150 in 6 steps (Arb. Units) (An & Sellgren 2003). In the middle panels the contour lines are based on the ERE (Berné et al. 2008). The lines have been normalized and range from 0.1 to 1 (Arb. Units) with 6 steps. Pixels with a S/N smaller than 3 in the ratio have been discarded. Bottom panel: the IRAC 8.0 μm image with the contours of the 11.2/3.3 μm ratio.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.