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The case for diffuse, collisionally ionized interstellar C IV and SI IV below Z = 1 KPC
Highly ionized gas in the galactic disk and disc/halo interface regionwas studied using IUE observations of C IV and Si IV absorption in 19codirectional sight-lines to early-type stars. Evidence for a generallydistributed, collisionally ionized phase of this gas having a density inthe plane of 3 times 10 to the minus 9th power/cc and a scale height inthe range of 1 to 3 kpc is presented. It is shown that the use of arestricted range of sight-line directions in studies such as this mayreduce confusion resulting from inhomogeneities in the distribution ofthe highly ionized medium.
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Observation and Astrometry data
| Constellation: | Ursa Minor |
| Right ascension: | 15h11m26.49s |
| Declination: | +65°38'20.7" |
| Apparent magnitude: | 7.77 |
| Distance: | 147.71 parsecs |
| Proper motion RA: | 2.7 |
| Proper motion Dec: | 23.9 |
| B-T magnitude: | 8.09 |
| V-T magnitude: | 7.797 |
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INHABITED SKY
