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Density Distribution of the Warm Ionized Medium | | Alex S. Hill
; Ronald J. Reynolds
; Robert A. Benjamin
; L. Matthew Haffner
; | | Date: |
16 Jan 2007 | | Abstract: | Observations of Halpha emission measures and pulsar dispersion measures at high Galactic latitude ( b > 10 deg) provide information about the density and distribution of the diffuse warm ionized medium (WIM). The diffuse WIM has a lognormal distribution of EM sin b , which is consistent with a density structure established by isothermal turbulence. The H+ responsible for most of the emission along high-EM sin b sightlines is clumped in high density (> 0.1 cm^{-3}) regions that occupy only a few parsecs along the line of sight, while the H+ along low-EM sightlines occupies hundreds of parsecs with considerably lower densities. | | Source: | arXiv, astro-ph/0701477 | | Services: | Forum | Review | PDF | Favorites | |
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