Compolation of interstellar lines

Abstract

We have collated absorption line data toward 3014 stars (Fig. 1) in order to create a unified database of interstellar column densities. These data have been taken from a number of different published sources and include many different species and ionizations. The preliminary results from our analysis show a tight relation between N(H) and E(B-V) i.e. [N(H)/E(B-V)=6.12x10²¹]. Similar plots have been obtained with many different species, and their correlations along with the correlation coefficients are presented.