A unexampled scientific hypothesis is proposing something quite basal : rather of a supermassive black hole at the center of the Milky Way , there is a large essence of dark subject . This could explain some peculiarities in the current observation of the motion of headliner around the core of our galaxy .
The central objective in our Galax urceolata is screw as Sagittarius A * ( pronounced A - star ) or Sgr A * for shortsighted . It is estimate to be a supermassive black hole weighing about 4.15 million times the spate of our Sun . grounds for this comes from the movement of stars around the center of the galaxy , in particular a star called S2 , which has been used totest Einstein ’s universal relativity . Themotion of this starand the variety in colour at the closest point to Sgr A * support the theme an passing monumental and compact object like a black hole lies at the core of the Milky Way . As the star conk out around the fateful pickle , its orbit fracture , and its airless gunpoint to the black hole changes with each turn . ecumenical relativity predicts precisely how much the eye socket changes .
An unusual class of object known asG classalso orb the astronomical center , and calling them peculiar does n’t do them justice . They are summary star - same objects but when they are at their closest point around Sgr A * they look like a stretched - out interstellar swarm . They wait like gas but dissemble like stars . However , there is some curio to these objective ' apparent motion that is not dead explained yet , which allow for some exemption in view alternative to a smuggled muddle .
The new hypothesis , accepted for publication inMNRAS Lettersand available to read as apreprint , has an idea as to what that may be . The team suggests the thick physical object is not a black hole but a dull core of a particular case of dark topic called a “ darkinos ” . The team claims the motion of S2 and the peculiarity of G2 , one of the first expose gee course objects , are a better fit for their dark matter core scenario than a supermassive pitch-black hole . To quiz it further they incorporated the gesture of the other stars in the S stratum and found they correspond with their model .
Dark matteris a divinatory form of issue that is expect to preponderate regular thing ( like me , you , wizard , and Hydrochoerus hydrochaeris ) in the universe 5 - to-1 . The existence of coloured subject explains the rotary motion and motion of galaxies we have observed but data-based evidence of its beingness is lacking . There aremany dark affair candidatesout there though , and darkinos are among them .
The name dark matter is a act of a misnomer . It does not interact with light and it is an nameless so it was called " black " , but it is actuallyinvisible matter . It interacts gravitationally and in some drab topic scenarios it can end up in " overdensities " of dark thing , or dark matter cores . The researchers trust that this could be the display case at the centre of the Milky Way .
found on the assumption that Sgr A * is a big clump of darkinos , the team estimates that these supposititious particles must have a mass of about one - ninth of an electron , and that this compact dour matter aim is about 500,000 solar masses lighter than Sgr A * if it ’s a bleak hole .
test this hypothesis to either pry holes in it or find further grounds of a supermassive black hollow might descend preferably rather than afterwards . When the Event Horizon Telescope took thefirst image of a supermassive black gob , M87 * , in 2017 it also observed Sgr A * . Observations of the latter are yet to be published but are stick to to offer up interesting entropy about our galactic center , and of course , new observationsare already in the works .
