Column density of neutral hydrogen (H I) as a function of dust extinction, AV, i.e. the dust-to-gas ratio. Blue filled circles again denote the GRBs with C I detected in absorption (empty blue circles show the GRBs with C I detected below the completeness limit). Black empty circles mark the GRBs in our sample without C I, where triangles represent bursts with upper limits on AV. The yellow squares show the quasar C I absorbers from Ledoux et al. (2015) and the green diamond symbols represent the quasar 2175 Å dust extinction feature absorbers from Ma et al. (2018). Overplotted are the average dust-to-gas ratios from specific sightlines in the Local Group (MW, LMC, LMC2 and SMC) from Gordon et al. (2003).
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.