Why is space roar six times louder than expected?

Space roar is radio waves received from outer space.

 

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Care to elaborate somewhat on that? Articles? Newpaper links? Anything?

 

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http://www.space.com/6293-mystery-roar-faraway-space-detected.html

They can't account for this roar with any known objects. Where do you think it comes from?

 

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question(possibly, no punctuation marks!) : "Why is space roar six times louder than expected?"
answer : There are, possibly, infinite number of answers to that question - the first answer I thought of was : It could possibly be because your volume control was turned up six times higher than expected. The amount of amplification or attenuation is usually adjustable.

Could you, possibly be trying to ask, : Why are there six times more radio waves received from outer space than expected?
If so, a possible answer could be that there are six times more sources for those radio waves than previously accounted for.

The electromagnetic spectrum encompasses everything from DC to light and beyond, so the amount of naturally produced noise or static or even, possibly, seemingly coherent, repetitive, regularly produced signals should not be expected to be a small number.

 

The news article writes "The signal is measured to be six times brighter than the combined emission of all known radio sources in the universe." and Kogut's attributed quote appears to support this but...

http://arxiv.org/abs/0901.0555

I think this is the observation under discussion. It's a graph with 9 data points relative to their predicted values and a fitted curve of unknown usefulness. I think it's 5+ standard deviation higher not 5+ times higher.

See also: http://arxiv.org/abs/0901.0559 (same data points, new graph)

 

The experimental physics is really interesting. The Arcade 2 paper is discussed in this recent paper looking for a theoretical reason for the difference in actual measurement and the predicted measurement going in. There's 32 citations for the paper you linked. One is a WMAP results paper.
Cosmological origin of anomalous radio background
http://arxiv.org/abs/1210.2717