The Height of Ionized Gas in the Inner Galaxy

Details The Height of Ionized Gas in the Inner Galaxy The Height of Ionized Gas in the Inner Galaxy

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...459..181p&link_type=abstract

Astrophysical Journal v.459, p.181

Astronomy and Astrophysics

Astronomy

4

Galaxies: Structure, Infrared: Ism: Lines And Bands, Ism: Abundances

Scientific paper

The distribution of diffuse [N II] 205 microns emission perpendicular to the Galactic plane at 1 = 7?28 is presented and compared with that of the [C II] 158 microns emission. The profile of [N u] emission, characteristic of warm ionized gas, is modeled as a Gaussian with a 13.3+43:23 arcminutes half-width at half-maximum (HWHM), apparently narrower than the 21.9+ }:o1 arcminutes HWHM of the distribution of [C II] 158 microns emission. The contribution of ionized gas close to the Galactic plane and traced by these observations accounts for 10%-30% of the [N II] line emission observed by COBE FIRAS The average ionizing flux derived for the inner Galaxy is consistent with the local hydrogen recombination rate. [N II] 205 microns emission was also detected from DR 21. The contribution of compact H II regions to the total Galactic luminosity of [N ii] is discussed.

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