{"id":520943,"date":"2026-01-16T18:23:15","date_gmt":"2026-01-16T18:23:15","guid":{"rendered":"https:\/\/www.europesays.com\/us\/520943\/"},"modified":"2026-01-16T18:23:15","modified_gmt":"2026-01-16T18:23:15","slug":"early-universes-little-red-dots-are-young-supermassive-black-holes-astrophysicists-say","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/520943\/","title":{"rendered":"Early Universe\u2019s \u2018Little Red Dots\u2019 Are Young Supermassive Black Holes, Astrophysicists Say"},"content":{"rendered":"

Astrophysicists at the University of Copenhagen show that the enigmatic \u2018little red dots\u2019 \u2014 red sources scattered across images of the early Universe \u2014 are rapidly growing black holes wrapped in ionized gas, offering new insight into how supermassive black holes formed after the Big Bang.<\/strong><\/p>\n

\"Little<\/a><\/p>\n

Little red dots are young supermassive black holes in dense ionized cocoons. Image credit: NASA \/ ESA \/ CSA \/ Webb \/ Rusakov et al., doi: 10.1038\/s41586-025-09900-4.<\/p>\n

Since the launch of the NASA\/ESA\/CSA James Webb Space Telescope in 2021, astronomers worldwide have grappled with the nature of red specks visible in regions of the sky corresponding to the Universe only a few hundred million years old.<\/p>\n

Early interpretations ranged from unusually massive early galaxies to exotic astrophysical phenomena that defied existing formation models.<\/p>\n

But after two years of painstaking analysis, University of Copenhagen\u2019s Professor Darach Watson and colleagues show that these dots are young black holes enveloped in dense cocoons of ionized gas.<\/p>\n

These cocoons heat up as the black holes gobble surrounding material, emitting intense radiation that is filtered through the gas and appears as the distinctive red glow captured by Webb\u2019s infrared cameras.<\/p>\n

\u201cThe little red dots are young black holes, a hundred times less massive than previously believed, enshrouded in a cocoon of gas, which they are consuming in order to grow larger,\u201d Professor Watson said.<\/p>\n

\u201cThis process generates enormous heat, which shines through the cocoon.\u201d<\/p>\n

\u201cThis radiation through the cocoon is what gives little red dots their unique red color.\u201d<\/p>\n

\u201cThey are far less massive than people previously believed, so we do not need to invoke completely new types of events to explain them.\u201d<\/p>\n

Although among the smallest black holes ever detected, these objects still pack a punch: weighing up to 10 million times more than the Sun and spanning millions of km in diameter, they reveal how black holes in the early Universe could have accelerated their growth.<\/p>\n

Black holes are inefficient eaters \u2014 only a fraction of the gas drawn in crosses the event horizon, while much is blasted back into space as high-energy outflows.<\/p>\n

But during this early phase, their surrounding gas cocoons act as both fuel and spotlight, letting astronomers witness black holes in an intense growth spurt unseen until now.<\/p>\n

The findings offer a crucial piece in the puzzle of how supermassive black holes \u2014 like the one in the center of the Milky Way \u2014 could have grown so quickly in the Universe\u2019s first billion years.<\/p>\n

\u201cWe have captured the young black holes in the middle of their growth spurt at a stage that we have not observed before,\u201d Professor Watson said.<\/p>\n

\u201cThe dense cocoon of gas around them provides the fuel they need to grow very quickly.\u201d<\/p>\n

The findings<\/a> appear this week in the journal Nature.<\/p>\n

_____<\/p>\n

V. Rusakov et al. 2026. Little red dots as young supermassive black holes in dense ionized cocoons. Nature 649, 574-579; doi: 10.1038\/s41586-025-09900-4<\/p>\n","protected":false},"excerpt":{"rendered":"Astrophysicists at the University of Copenhagen show that the enigmatic \u2018little red dots\u2019 \u2014 red sources scattered across…\n","protected":false},"author":3,"featured_media":520944,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[3213,187067,74314,890,231945,916,492,159,5162,67,132,6747,68,26995],"class_list":{"0":"post-520943","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-physics","8":"tag-black-hole","9":"tag-csa","10":"tag-early-universe","11":"tag-esa","12":"tag-little-red-dot","13":"tag-nasa","14":"tag-physics","15":"tag-science","16":"tag-supermassive-black-hole","17":"tag-united-states","18":"tag-unitedstates","19":"tag-universe","20":"tag-us","21":"tag-webb"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/115906177138344376","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/520943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/comments?post=520943"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/520943\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/520944"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=520943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=520943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=520943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}