Even decades after it was first proposed by Vera Rubin and Kent Ford , dark matter remains a mystery . Something appears to impress galaxies but it does n’t interact with twinkle . We are much well at dominate out possible explanation than demonstrate them correct , and astronomers have just collect data that indicate that dreary matter is not made up of small primeval black hollow .
The link between the two is sure enough appeal . The being of primordial black holes is far from certain . smuggled maw and coloured matter both interact only with gravity and we only see their effects . The late Stephen Hawking and other physicist cogitate that primal bleak holes were an challenging account for dark matter . But unluckily , this is not matched by observations .
Black holes are highly heavy object , so thick that they can bend the luminousness from objects they are in front of . If a vast issue of black holes mold just after the Big Bang and are now hold up dark matter , we might be able-bodied to discern subtle changes in the light of the galaxies they orbit . This phenomenon is called microlensing because it does n’t warp the screen background light completely . It just gives the igniter of the star a trivial hike .
Researchers at theKavli Institute for the Physics and Mathematics of the Universeused the Subaru Telescope to observe the Andromeda galaxy . To see a microlensing event , you need to have a black jam , a whiz , and the perceiver coordinate . To maximize their chances , the team used the Hyper Suprime - Cam digital camera on the telescope , which can snap the whole of Andromeda in a single shooting . They collected over 190 trope of Andromeda .
If the dark affair was made by smutty holes just 0.1 mm in radius ( so easy than the Moon ) , the team calculate that they would see 1,000 campaigner microlensing events . They observed only one .
The findings , reported inNature Astronomy , imply that primordial disgraceful holes can only be responsible for no more than 0.1 per centum of dark matter . enquiry from last year already show up that black holes can only account forless than 40 percentof morose issue . The mystery of the true nature of dark matter endures .
