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Observational description of the warp in our galaxy

  • A. P. Henderson (a1)

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In 1975 F. J. Kerr and P. F. Bowers of the University of Maryland made a full coverage survey of the neutral hydrogen in the southern hemisphere between ±10° latitude from 240° to 350° in longitude. This survey taken with the CSIRO 18 meter telescope is still in the reduction stage but when completed it will provide an ideal complement to the full ±10° coverage of the northern sky by H. Weaver and D. R. W. Williams (1973). The possibility of a unified analysis of the outer region of the Galaxy has inspired this present study. The plan here is to use the ±10° Weaver-Williams survey in the region 10° < ℓ < 130°; the ±30° extension to this survey (H. Weaver and D. R. W. Williams, 1974) in the region 115° < ℓ < 245° and finally the Kerr-Bowers survey, 240° < ℓ < 350°. Since the latter survey is incompletely reduced at this time we have only used profiles at 5° intervals in longitude and thereby have produced a preliminary determination of the plane in the southern hemisphere. The northern hemisphere determination is complete.

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Copyright

References

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Burton, W.B. and Verschuur, G.L., 1973, Astron. Astrophys. Suppl., 12, 145.
Henderson, A.P., 1967, , .
Jackson, P.D. and Kellman, S.A., 1974, Astrophys. J., 190, 53.
van de Hulst, H.C., Muller, C.A. and Oort, J.H., Bull. Astron. Inst. Neth., 12, 117.
Weaver, H. and Williams, D.R.W., 1973, Astron. Astrophys. Suppl., 8, 1.
Weaver, H. and Williams, D.R.W., 1974, Astron. Astrophys. Suppl., 17, 251.

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