An international team of researcher believes that sinister matter might be different to what we previously thought . In particular , they call back that the density of obscure topic might be lower than thought , basing this hypothesis on some brand unexampled and rather puzzle observations .
The team looked at galaxy cluster , focusing specifically on the large and lustrous galaxies at their center known as “ bright cluster galaxies ” or BCGs , which may not be very inventive when it comes to studying coloured matter , but they are good for tell it like it is . According to the stock model of glum matter , BCGs are stuck in plaza by the huge amount of mass ( both unconstipated and dark ) that circumvent them . But new observations have seen them wobbling .
Dark affair is a mysterious class of matter that only interacts with gravity and not visible radiation so it can not be seen . It also does n’t cluster up , so you ca n’t have a morose matter satellite . It is , however , believed to have take form the gravitative wells where wandflower first formed and as galaxies meld and get along together in clusters , so does dark matter . Galaxy clusters are surrounded by a “ aura ” of this stuff and nonsense .
" We found that that the BCGs ' slosh ' around at the bottom of the glory , " take author David Harvey , from the Ecole Polytechnique Federale de Lausanne , said in astatement . " This show that , instead of a dense neighborhood in the center of the galaxy cluster , there is a much shallower central denseness – a salient signal of exotic forms of dark matter right at the heart of extragalactic nebula bunch . "
While their findings , published in theMonthly Notices of the Royal Astronomical Society , could have long - reaching issue in the search for dreary matter , the observations were guide on only 10 galaxy bunch . Such a small number is not sufficient to establish if there is fresh physics at play , like some exotic dreary issue particle , or that the wobble might be make by some astrophysical process , such as a gravitative fundamental interaction , just yet .
The researchers are planning to face at more galaxy bunch and take advantage of turgid resume , like the upcomingEuclidmission , that will represent significant helping of the sky .
coloured matter should lay out almost 30 percent of the affair - zip content of the existence . We have no idea what it is and yet , while not perfect , the hypothesis that it exist is still far more successful than alternative theories .
