Over a decade ago , research worker discovered a lot more da Gamma - rays come from the midpoint of the Milky Way than they thought possible . At the time , dreary matter was considered one of the culprit for the astronomical centerfield excess ( GCE ) , but a new cogitation allow for the inviolable evidence yet that this is not the case .
The study , release inPhysical Review D , provides constraints on GCE farm by what we jazz of dark thing . This is an important caveat as dark matter stay on hypothetical and everything we reckon we bang about it come from experiments that have told us what dark matter isnot , rather than what it is .
When the GCE was discovered , astronomers considered many other potential sources , such as hotshot formation , cosmic rays being bend , and neutron whiz . Although a undivided cause has not been base , over the class the typesetter’s case for saturnine matter has become more complex to justify , even thoughsome intimation of hope remained . This new subject suggests we should bury about that possible action completely .
“ We looked at all of the different moulding that goes on in the Galactic Center , include molecular gas , stellar emissions , and high - energy electron that scatter low - energy photons , ” Centennial State - generator Dr Oscar Macias , from the Kavli Institute for the Physics and Mathematics of the Universe at the University of Tokyo , say in astatement . “ We make over three years to pull all of these new , better models together and probe the emissions , finding that there is small room leave for dark matter . ”
“ If you peer at the Galactic Center , you see that the stars are distributed in a boxlike way , ” co - authorManoj Kaplinghat , a professor from the University of California Irvine ( UCI ) , added . “ There ’s a disk of star , and right in the center , there ’s a bulge that ’s about 10 academic degree on the sky , and it ’s actually a very specific shape – sort of an asymmetrical box – and this shape leaves very little room for extra dark matter . ”
This does n’t mean that drab matter does n’t exist , the researchers stress , but due to subatomic particle interaction , it ca n’t produce such a distinct da Gamma - ray signal .
“ There are a circumstances of alternative dark topic candidates out there , ” add carbon monoxide gas - generator Kevork Abazajian , a professor from UCI . “ The search is fail to be more like a sportfishing hostile expedition where you do n’t already know where the fish are . ”
