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Optical and HI studies of high- and intermediate-velocity gas towards Complex A
We present high-resolution optical and 21-cm Hi spectra of sevenearly-type stellar sightlines towards the high-velocity cloud Complex A,at distances of up to 4.6 kpc from the Galactic plane. We do notoptically detect the -160 kms^-1 interstellar gas associated withComplex A, and so are unable to establish limits on its distance.However, we do detect gas associated with the Low Latitude IntermediateVelocity Arch, placing it at z<0.9kpc, and also establish distancelimits (z<=1.2-3.3kpc) on several other intermediate- andhigh-velocity clouds in this region that have not been cataloguedpreviously.
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Observation and Astrometry data
| Constellation: | Ursa Major |
| Right ascension: | 09h20m28.21s |
| Declination: | +49°36'28.2" |
| Apparent magnitude: | 9.58 |
| Proper motion RA: | -21.1 |
| Proper motion Dec: | -34.9 |
| B-T magnitude: | 10.098 |
| V-T magnitude: | 9.623 |
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