NCSA Astronomy Digital Image Library
Project Abstract and Description
The HI Sky
F. J. Lockman and J. M. Dickey
Contact: Felix J. Lockman
Email: jlockman@nrao.edu
Number of images in project: 1
References: 1990ARA&A..28..215D
Abstract
A map of the total number of hydrogen atoms in different directions on
the sky is presented. The map is oriented so that the plane of the
Milky Way is horizontal and the Galactic Center is in the center of the
picture. Most of the arcs and circular structures outline huge regions
created by supernova explosions. The map combines seven different 21
cm HI surveys, averaged over 1 square degree intervals.
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