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HI in the Milky Way: Selected Problems Illustrated by the Leiden/Dwingeloo Survey

Published online by Cambridge University Press:  25 May 2016

W.B. Burton ,
Dap Hartmann  and
S.R.D. West
W.B. Burton
Affiliation:
Leiden Observatory P.O. Box 9513, Leiden, 2300 RA, The Netherlands
Dap Hartmann
Affiliation:
Leiden Observatory P.O. Box 9513, Leiden, 2300 RA, The Netherlands
S.R.D. West
Affiliation:
Leiden Observatory P.O. Box 9513, Leiden, 2300 RA, The Netherlands

Abstract

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Some of the principal problems which can be confronted with HI observations of our Galaxy are illustrated here by a selection of maps showing the disposition on the sky of HI emitting in particular velocity ranges. The data are from the new Leiden/Dwingeloo survey of the entire sky north of δ ≥ −30°, which has occupied the 25–meter radio telescope of the Netherlands Foundation for Research in Astronomy for a period of five years. The tendency of the general gas/dust correlation to involve some HI structures with quite anomalous velocities is illustrated by comparing some λ21–cm data taken on a finer grid using the Arecibo 1000–foot telescope with IRAS data in the 100–micron band.

Type
Chapter 6: How are we to Understand the Large Scale Structure of the ISM?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 447 - 468
Copyright
Copyright © Kluwer 1996 

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