Starts With A Bang #41 - Before The First Stars
Starts With A Bang podcast
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The Problem With Infrared Astronomy
The idea is if you line them up one to one, you should see an anti-correlation. But the problem is that 21 centimeter is a line emission and so we can't make a three-dimensional map with redshift. So it's not a line, it's actually a continuum. And so you can't form a map like you can with the 21 centimeter. What you can do is correlate either the entire 21 centimeter sky with what you're seeing in the infrared. Or you could do slices of the 21 centimeters sky with the entire infrared and see how fast is the universe being ionized,. How fast is the cosmos forming stars?
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