Fig. 14.

Download original image
Dumbbell Nebula: as imaged in the g and Hα bands (upper and lower panels, respectively). The g image includes the strong [O III] 495.9, 500.7 nm lines. The cutouts are taken from the same corner of CCD #2 in runs r-477762 and r-1241402, picked for having well-matched seeing (respectively 1.31 and 1.25 arcsec). The colour scales used are capped at 1250 counts for g and 5000 counts for Hα to match the ratio of their exposure times. They run from black at background level up through green/magenta/red to yellow at the bright end. This PN has a diameter of approximately 6 arcmin. North is up, east to the left.
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.