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Radio Mapping

Published online by Cambridge University Press:  03 August 2017

E.R. Deul  and
W.B. Burton
E.R. Deul
Affiliation:
Sterrewacht Leiden, P.O. Box 9513, 2300 AA Leiden, The Netherlands
W.B. Burton
Affiliation:
Sterrewacht Leiden, P.O. Box 9513, 2300 AA Leiden, The Netherlands

Abstract

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The mapping discussed in this paper is based on observations obtained from the 21–cm emission line of neutral atomic hydrogen. We will give an overview of the existing large surveys and present a homogeneous datacube that contains the most important surveys. This datacube was created by regridding the original observations, for the surveys included, onto a common denominator grid. Presenting a three dimensional dataset of intensities in one single image is impossible, therefore we made a film that displays in a time sequence a set of cuts (position–velocity maps) through the datacube. The advantage of showing the third coordinate in time is that the eye can now catch continuities in this coordinate that were previously hidden in the data.

Type
Part II: Current Research
Information
Symposium - International Astronomical Union , Volume 133: Mapping the Sky: Past Heritage and Future Directions , 1988 , pp. 311 - 321
Copyright
Copyright © Kluwer 1988 

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