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Submitted via IRC for boru
A research team of multiple institutes, including the National Astronomical Observatory of Japan and University of Tokyo, released an unprecedentedly wide and sharp dark matter map based on the newly obtained imaging data by Hyper Suprime-Cam on the Subaru Telescope. The dark matter distribution is estimated by the weak gravitational lensing technique (Figure 1, Movie). The team located the positions and lensing signals of the dark matter halos and found indications that the number of halos could be inconsistent with what the simplest cosmological model suggests. This could be a new clue to understanding why the expansion of the Universe is accelerating.
[...] The team is leading a large scale imaging survey using Hyper Suprime-Cam (HSC) to probe the mystery of the accelerating Universe. The key here is to examine the expansion history of the Universe very carefully.
In the early Universe, matter was distributed almost but not quite uniformly. There were slight fluctuations in the density which can now be observed through the temperature fluctuations of the cosmic microwave background. These slight matter fluctuations evolved over cosmic time because of the mutual gravitational attraction of matter, and eventually the large scale structure of the present day Universe become visible. It is known that the growth rate of the structure strongly depends on how the Universe expands. For example, if the expansion rate is high, it is hard for matter to contract and the growth rate is suppressed. This means that the expansion history can be probed inversely through the observation of the growth rate.
It is important to note that growth rate cannot be probed well if we only observe visible matter (stars and galaxies). This is because we now know that nearly 80 % of the matter is an invisible substance called dark matter. The team adopted the 'weak gravitation lensing technique.' The images of distant galaxies are slightly distorted by the gravitational field generated by the foreground dark matter distribution. Analysis of the systematic distortion enables us to reconstruct the foreground dark matter distribution.
Source: https://www.subarutelescope.org/Pressrelease/2018/02/26/index.html
(Score: 3, Informative) by Whoever on Thursday March 15 2018, @04:18PM (5 children)
This isn't the name of a car company.
It's the Japanese name for the constellation Pleiades, commonly known as "Seven Sisters"
(Score: 2) by cocaine overdose on Thursday March 15 2018, @04:35PM (1 child)
(Score: 2) by linkdude64 on Thursday March 15 2018, @10:37PM
Dildo folded 1000 times
(Score: 2) by HiThere on Thursday March 15 2018, @06:38PM
If I Understand Correctly, Subaru is Japanese for the constellation that the Greks named the seven siters.
Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
(Score: 2) by PinkyGigglebrain on Thursday March 15 2018, @07:02PM
I've always wondered why the logo on Subaru autos was a bunch of stars. Just never remembered to search it once I got home.
Thank you.
"Beware those who would deny you Knowledge, For in their hearts they dream themselves your Master."
(Score: 2) by linkdude64 on Thursday March 15 2018, @10:37PM
Thanks for the info!