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Jameson et al. have presented the results
from a new Australia Telescope Compact Array (ATCA) HI absorption
survey towards 55 sources in the Small Magellanic Cloud. They
combined the new ATCA (interferometric) data with archival Parkes
(single-dish) data to produce a spectrum of the HI emission for each
source, and the ATCA data to search for absorption features.
The image above shows the map of detected continuum sources. Sources
with detected absorption are represented by colored circles, where the
color indicates peak absorption (color scale, bottom left), and circle
size represents the source strength. Sources with no detected
absorption are shown as grey circles with crosses. The background gray
scale image shows the column density of HI (assuming optically thin
emission), and the main body of the galaxy is indicated by the black
contour line. The HI appears to be evenly distributed throughout the
SMC and absorption was detected in 67% of the lines of sight in the
sample, including some outside the main body of the galaxy.
More information is give in the the data in
the paper to be
published in the Astrophysical Journal Supplement Series.
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