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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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Osservazione e dati astrometrici
| Costellazione: | Orsa Minore |
| Ascensione retta: | 15h11m26.49s |
| Declinazione: | +65°38'20.7" |
| Magnitudine apparente: | 7.77 |
| Distanza: | 147.71 parsec |
| Moto proprio RA: | 2.7 |
| Moto proprio Dec: | 23.9 |
| B-T magnitude: | 8.09 |
| V-T magnitude: | 7.797 |
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