Free Access

Fig. 12


Radio continuum image taken from the Canadian Galactic Plane Survey at 1420 MHz (top) and H i absorption profiles (bottom) of H ii regions with high radio surface brightness in comparison with the profile of an extragalactic source. It is easy to see that the entire local H i absorbs the radio continuum emission from those H ii regions with a negative systemic velocity vsys, while those with a high positive vsys are only absorbed by a part of that gas, indicating that the negative-velocity H ii regions are farther away than the high positive-velocity ones. This rules out the possibility of them being part of one big dynamically connected structure.

This figure is made of several images, please see below:

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.