Astronomers have used the tumid sample distribution of galaxies detect ever , covering nearly one - one-eighth of the sky , to produce the most precise measurement of the composition and growth of the universe of discourse .
The first three year of information from the Dark Energy Survey ( DES ) have been published . Astronomers used observance of over 226 million galaxies to create the orotund ever single-valued function of the distribution of galaxies , expand more than 7 billion light - long time into the cosmos . The results will make stargazer catch one’s breath a suspiration of rest . The Standard Model of Cosmology , the primary theory underpinning our savvy of the universe , continues to be by far the best model of the cosmos .
The standard model requires the existence to be made of three main components : Regular matter , which is what we are made of ; glum matter , an invisible gist that permeate everywhere and outweighs unconstipated thing five to one ; and dark free energy , the most abundant component , responsible for the accelerated expansion of the universe .
“ These analysis are truly Department of State - of - the - artistic production , necessitate contrived intelligence and mellow - performance computing superintendent - charge by the smartest young scientists around , ” sound out Scott Dodelson , a physicist at Carnegie Mellon University who co - leads the DES Science Committee with Elisabeth Krause of the University of Arizona , say in astatement . “ What an award to be part of this squad . ”
The results of this enormous data release are call for in30 scientific papersand have allowed stargazer and physicists to constrain the constraints of what we know about the mysterious dark thing and black energy as well as the possibility that expect them . The teams also compare the current results to the function of the cosmic microwave background ( CMB ) , the first light that shone freely in the universe , which is also used to test the standard manikin .
The data are both reproducible with each other and with the fashion model , gratefully . In cosmology , there is anongoing tensionbetween the expectation from the CMB and the outlook from galaxies in the closer macrocosm . The DES has not establish anything that is about to change our understanding but a soupcon stay that the macrocosm looks like a little number smooth than foreshadow from the analysis of the CMB .
“ It would be very exciting to incur contradictions between wandflower surveys like DES and analytic thinking of the CMB , as they would provide hints of new physics . This discovered difference in the clustering of matter could be one such contradiction in terms , but we will need more data point to confirm it , ” Dr Pablo Lemos ( both UCL Physics & Astronomy and Sussex University ) , atomic number 27 - author of the new analysis paper , aver in astatement .
The Standard Model remains steadfastly dependable but will continue to be tested as any possibility should be . The data expiration from DES is about one-half of the total observations conduct so more stringent tests will get along . The DES collaboration consists of over 400 scientists from 25 mental hospital in seven countries .
“ The coaction is signally youthful . It ’s tilted strongly in the direction of postdocs and graduate students who are doing a huge amount of this study , ” DES Director and spokesperson Rich Kron , who is a Fermilab and University of Chicago scientist , said in astatement . “ That ’s really gratifying . A young generation of cosmologists are being trained using the Dark Energy Survey . ”
