Free Access

Fig. 2

thumbnail

The Galactic H i column density plotted against the total equivalent hydrogen column density measured from soft X-ray absorption toward Swift GRBs (NHX). While the soft X-ray absorption is presented in units of equivalent hydrogen column density, it is effectively a metal column density converted to equivalent column density assuming AG89 abundances (see text). The best-fit relation is super-solar and is plotted as in Fig. 1 above. The best-fit relation, corresponding to a ratio of , would be even higher using the current Asplund et al. (2009) solar metallicities.

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.