fig 2 (IMAGE)

University of Manchester

fig 2

Caption

MeerKAT view of the observed sky field. This radio image shows the patch of sky observed with MeerKAT as part of the study. The bright points are radio-emitting galaxies and other compact sources, whose emission is much stronger than the faint hydrogen signal the team set out to measure. One of the major challenges of hydrogen intensity mapping is separating this extremely weak signal from much brighter foreground radio emission and unwanted interference. The hydrogen signal itself is not visible by eye in this image; it is extracted from the MeerKAT data using careful analysis designed to isolate the cosmic hydrogen emission.

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https://doi.org/10.3847/2041-8213/ae808f

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