Free Access
Fig. 5

Download original image
Comparison of a black-body SED with the radio–to–far-infrared SED for Arp 220 (Yun & Carilli 2002). The left vertical dashed line is at 140.8 GHz, which is the frequency for the 313 − 111 transition. The right vertical dashed line is at 2808 GHz, which is the highest transition frequency for the 40 levels.
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.