Abstract
For pulsars at distances of several kpc, ∫neds may depend primarily on the HII regions in the line of sight. The importance of hydrogen ionized by early type stars can be estimated.
Original language | English (US) |
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Pages (from-to) | 729-732 |
Number of pages | 4 |
Journal | Nature |
Volume | 221 |
Issue number | 5182 |
DOIs | |
State | Published - Dec 1 1969 |