[{"command":"openDialog","selector":"#drupal-modal","settings":null,"data":"\u003Cdiv id=\u0022republish_modal_form\u0022\u003E\u003Cform class=\u0022modal-form-example-modal-form ecl-form\u0022 data-drupal-selector=\u0022modal-form-example-modal-form\u0022 action=\u0022\/en\/article\/modal\/7168\u0022 method=\u0022post\u0022 id=\u0022modal-form-example-modal-form\u0022 accept-charset=\u0022UTF-8\u0022\u003E\u003Cp\u003EHorizon articles can be republished for free under the Creative Commons Attribution 4.0 International (CC BY 4.0) licence.\u003C\/p\u003E\n \u003Cp\u003EYou must give appropriate credit. We ask you to do this by:\u003Cbr \/\u003E\n 1) Using the original journalist\u0027s byline\u003Cbr \/\u003E\n 2) Linking back to our original story\u003Cbr \/\u003E\n 3) Using the following text in the footer: This article was originally published in \u003Ca href=\u0027#\u0027\u003EHorizon, the EU Research and Innovation magazine\u003C\/a\u003E\u003C\/p\u003E\n \u003Cp\u003ESee our full republication guidelines \u003Ca href=\u0027\/horizon-magazine\/republish-our-stories\u0027\u003Ehere\u003C\/a\u003E\u003C\/p\u003E\n \u003Cp\u003EHTML for this article, including the attribution and page view counter, is below:\u003C\/p\u003E\u003Cdiv class=\u0022js-form-item form-item js-form-type-textarea form-item-body-content js-form-item-body-content ecl-form-group ecl-form-group--text-area form-no-label ecl-u-mv-m\u0022\u003E\n \n\u003Cdiv\u003E\n \u003Ctextarea data-drupal-selector=\u0022edit-body-content\u0022 aria-describedby=\u0022edit-body-content--description\u0022 id=\u0022edit-body-content\u0022 name=\u0022body_content\u0022 rows=\u00225\u0022 cols=\u002260\u0022 class=\u0022form-textarea ecl-text-area\u0022\u003E\u003Ch2\u003EHow did supermassive black holes grow so fast?\u003C\/h2\u003E\u003Cp\u003EThis is a problem that has long plagued astronomers. Our current understanding suggests that in this time frame, only so-called intermediate mass black holes up to \u003Ca href=\u0022https:\/\/www.wired.com\/story\/where-do-supermassive-black-holes-come-from\/\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003E100,000 times\u003C\/a\u003E the mass of our Sun should have been able to grow. And while several theories for this rapid early black hole growth have been proposed, the answer remains elusive.\u003C\/p\u003E\u003Cp\u003E\u2018That is still a huge problem in astrophysics,\u2019 said Dr John Regan, an astrophysicist from Dublin City University, Ireland.\u003C\/p\u003E\u003Cp\u003EBlack holes form after a massive star runs out of fuel, sometimes resulting from a supernova and other times without a supernova, which is called the direct collapse scenario. Once a star has no fuel left to burn, it can no longer support its mass and collapses. If the mass of the star was large enough, it will collapse into an object with an immense gravitational pull from which nothing, not even light, can escape \u2013 a black hole.\u003C\/p\u003E\u003Cp\u003EAs the black hole gradually draws in more and more nearby dust and gas it can grow in size, eventually reaching the gigantic proportions of a supermassive black hole, such as the first one ever\u0026nbsp;\u003Ca href=\u0022https:\/\/horizon-magazine.eu\/article\/astronomers-reveal-first-ever-image-black-hole.html\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003Eimaged in April 2019\u003C\/a\u003E. Scientists are now investigating whether supermassive black holes could have formed from supermassive stars which collapsed to form large \u2018seed\u2019 black holes, giving them a head start in their growth. \u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDr Regan coordinated a project called \u003Ca href=\u0022https:\/\/cordis.europa.eu\/project\/rcn\/200207\/factsheet\/en\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003ESmartStars\u003C\/a\u003E, which used one of the most powerful supercomputers in Ireland, \u003Ca href=\u0022https:\/\/www.ichec.ie\/\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003EICHEC\u003C\/a\u003E, to model how supergiant stars might provide the seeds for supermassive black holes. The team wanted to see if these stars could account for the rapid growth of supermassive black holes, which we see at the centre of nearly every galaxy today.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003E250,000\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EThey found \u003Ca href=\u0022https:\/\/ui.adsabs.harvard.edu\/abs\/2019MNRAS.486.3892R\/abstract\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003Esuch stars could grow\u003C\/a\u003E up to 250,000 times the mass of the sun within 200 million years of the Big Bang \u2013 a tantalising result. However, even supercomputers have their limitations. The researchers were only able to model the future of such stars for a million years, but the modelling needs to cover 800\u0026nbsp;million years to see if these stars really could be the seeds of supermassive black holes.\u003C\/p\u003E\u003Cp\u003E\u2018It\u2019s a really excellent starting point,\u2019 said Dr Regan. \u2018Over the next generation of supercomputers we\u2019ll be able to bring those simulations further and further along.\u2019\u003C\/p\u003E\u003Cp\u003EOther theories for how these black holes grew so quickly are that a tiny fraction of black holes grew at incredible rates, or that smaller black holes merged together to grow into a supermassive black hole.\u003C\/p\u003E\u003Cp\u003EDr Muhammad Latif, an astrophysicist at United Arab Emirates University in Abu Dhabi, agrees with Dr Regan that the supermassive star model remains our best theory at the moment. Dr Latif was the principal investigator for the \u003Ca href=\u0022https:\/\/cordis.europa.eu\/project\/rcn\/195268\/factsheet\/en\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003EFIRSTBHs project\u003C\/a\u003E which, like SmartStars, investigated the plausibility of the supermassive star model, using simulations on a supercomputer in France.\u003C\/p\u003E\u003Cp\u003E\u003Cblockquote class=\u0022tw-text-center tw-text-blue tw-font-bold tw-text-2xl lg:tw-w-1\/2 tw-border-2 tw-border-blue tw-p-12 tw-my-8 lg:tw-m-12 lg:tw--ml-16 tw-float-left\u0022\u003E\n \u003Cspan class=\u0022tw-text-5xl tw-rotate-180\u0022\u003E\u201c\u003C\/span\u003E\n \u003Cp class=\u0022tw-font-serif tw-italic\u0022\u003E\u0026#039;It\u2019s like going to kindergarten and finding a seven-feet tall baby.\u0026#039;\u003C\/p\u003E\n \u003Cfooter\u003E\n \u003Ccite class=\u0022tw-not-italic tw-font-normal tw-text-sm tw-text-black\u0022\u003EDr Muhammad Latif, United Arab Emirates University\u003C\/cite\u003E\n \u003C\/footer\u003E\n\u003C\/blockquote\u003E\n\u003C\/p\u003E\u003Cp\u003EHis project, which was carried out at CNRS in France, showed that supermassive stars could produce seed black holes \u003Ca href=\u0022https:\/\/ui.adsabs.harvard.edu\/abs\/2016PASA...33...51L\/abstract\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003Ehundreds of thousands\u003C\/a\u003E of times the mass of our sun. \u2018We found this method is basically feasible,\u2019 said Dr Latif, explaining that these initial seed black holes are large enough to account for the growth of supermassive black holes of a billion solar masses in a small time frame.\u003C\/p\u003E\u003Cp\u003EHowever, it requires conditions in the early universe to have been just right for these black holes to form. Large amounts of material made of hydrogen and helium would be needed to form enough massive seed black holes to produce supermassive black holes, which appears to have been possible.\u003C\/p\u003E\u003Cp\u003EBut other unexplained factors mean this is still an open question. The seed black holes would need to draw in matter at a rate of at least 0.1 solar masses per year, for example, and at the moment it is not clear if this is possible.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EObservatories\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003ESeveral observatories are already enabling us to probe black holes in the early universe with great detail. In October 2019, \u003Ca href=\u0022https:\/\/scitechdaily.com\/astronomers-unexpected-discovery-could-explain-supermassive-black-hole-growth-in-early-universe\/\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003Eastronomers announced\u003C\/a\u003E that they had used the Atacama Large Millimetre\/submillimetre Array (ALMA) in Chile to find a thick ring of dust and gas around a supermassive black hole inside a distant galaxy. With two gas streams rotating in opposite directions, it\u2019s thought this ring could have fed the supermassive black hole with enough material to cause it to grow rapidly.\u003C\/p\u003E\u003Cp\u003EPreviously, in August 2019, NASA\u2019s Chandra X-ray Observatory \u003Ca href=\u0022https:\/\/www.nasa.gov\/mission_pages\/chandra\/news\/cloaked-black-hole-discovered-in-early-universe-using-nasa-s-chandra.html\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003Emanaged to spot\u003C\/a\u003E a so-called \u2018cloaked\u2019 black hole growing rapidly when the universe was just 6% of its current age. A thick cloud of gas hides the black hole and its resulting quasar, a bright region of superheated material that surrounds it, but Chandra was able to spot it by seeing X-rays emerge from the cloud.\u003C\/p\u003E\u003Cp\u003EHowever, future telescopes will likely be needed to study the rapid growth of supermassive black holes in even more detail. For example, while we can predict the existence of seed black holes, we can\u2019t yet see them. NASA\u2019s upcoming James Webb Space Telescope (JWST), due to launch in 2021, may be capable of spotting some of the undiscovered seed black holes.\u003C\/p\u003E\u003Cp\u003EThe European Space Agency\u2019s \u003Ca href=\u0022https:\/\/sci.esa.int\/web\/athena\u0022 target=\u0022_blank\u0022 rel=\u0022noopener noreferrer\u0022\u003EAdvanced Telescope for High Energy Astrophysics\u003C\/a\u003E (ATHENA), meanwhile, set to launch in 2031, should give us an even better understanding of how supermassive black holes arise.\u003C\/p\u003E\u003Cp\u003E\u2018People are quite hopeful that we will get a rather better picture with the ATHENA mission,\u2019 said Dr Latif. And maybe soon, we\u2019ll finally know how these huge objects grew so big in such a short space of time.\u003C\/p\u003E\u003Cp\u003E\u2018It\u2019s like going to kindergarten and finding a seven-feet tall baby,\u2019 added Dr Latif.\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003EThe research in this article was funded by the EU. 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