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A survey of neutral hydrogen at high galactic latitudes

  • W. C. Erickson (a1), H. L. Helfer (a1) and H. E. Tatel (a1)

Extract

Approximately 1000 observations of neutral hydrogen have been obtained with the 54-channel H-line receiver and the Würzburg antenna of the Carnegie Institution of Washington. H-line profiles have been observed at 10-degree intervals along the ±20-, ±30-, and ± 40-degree parallels of galactic latitude; at 20-degree intervals along the ± 50- and ±60-degree parallels; at 40-degree intervals along the ±70- and ±80-degree parallels and at the poles. Approximately two dozen observations have been taken at points near the galactic plane in order to correlate these observations with the Leiden survey [1]. The beamwidth of the Würzburg antenna was about 2 degrees. The observations were taken in two series, one series during the summer of 1957, and the other series during 1958 January. The video frequency bandwidth of the receiver is 12 kc/s. The profiles consist of averages of from two to six scans with integration times from 4.8 to 7.5 minutes.

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References

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1. Muller, C. A., et al. B.A.N. 475, 151, 1957.
2. Christiansen, W. N., and Hindman, J. V. Aust. J. Sci. Res. A 5, 437, 1951.

A survey of neutral hydrogen at high galactic latitudes

  • W. C. Erickson (a1), H. L. Helfer (a1) and H. E. Tatel (a1)

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