HSC dark matter survey...where is it?

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SUMMARY

The discussion centers on the comparison between the Hyper Suprime-Cam (HSC) dark matter map and the Planck map of dark matter. It clarifies that the Planck satellite does not produce a direct dark matter map but averages temperature statistics to estimate dark matter density. The figures referenced in the discussion are likely simulations based on model parameters from both HSC and Planck, rather than actual data from the arXiv article cited. The statistical significance of the results is questioned, suggesting that discrepancies may be due to flukes or unconsidered errors, with future HSC data expected to provide clarity.

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yahastu
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Both of these webpages show snippets comparing the HSC map of dark matter to the Planck map of dark matter, as well as a graphic showing the time evolution of the dark matter over time:
https://www.livescience.com/63711-3d-dark-matter-map.html
https://phys.org/news/2018-09-hyper-suprime-cam-survey-dark-universe.html

Both of the above webpages cite this arxiv article:
https://arxiv.org/abs/1809.09148

However, when I look in this arxiv article, I cannot find either of the figures anywhere in it. Can anyone direct me to the actual article that these figures were taken from, or to some other authoritative source of those images?
 
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yahastu said:
Both of these webpages show snippets comparing the HSC map of dark matter to the Planck map of dark matter,
This is a bit of a misunderstanding of the data. There is no Planck map of dark matter, as it doesn't measure dark matter in a way that can be used to construct a map (short version: Planck averages certain temperature statistics across the sky to measure the average amount of dark matter).

The two plots are simulations showing what the large-scale structure should look like given two different sets of model parameters: one from Planck's measurements, one from HSC's.

yahastu said:
However, when I look in this arxiv article, I cannot find either of the figures anywhere in it. Can anyone direct me to the actual article that these figures were taken from, or to some other authoritative source of those images?
Unfortunately I'm not sure where they got those. If I had to guess, they were either made directly for the press release, or were taken from a presentation one of the project scientists did. Either way, they should be considered visual aids rather than real data.

That said, as near as I can tell, the statistical significance of this result isn't that overwhelming. There may be some tension, but the discrepancy is small enough that it could easily be a fluke (or a source of error that wasn't thought of by the project scientists). Ideally the additional HSC data coming in over the next few years should help to clarify the situation.
 

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