{"id":111954,"date":"2025-08-02T03:31:10","date_gmt":"2025-08-02T03:31:10","guid":{"rendered":"https:\/\/www.europesays.com\/us\/111954\/"},"modified":"2025-08-02T03:31:10","modified_gmt":"2025-08-02T03:31:10","slug":"the-universes-first-little-red-dots-may-be-a-new-kind-of-star-with-a-black-hole-inside","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/111954\/","title":{"rendered":"The Universe\u2019s First \u201cLittle Red Dots\u201d May Be a New Kind of Star With a Black Hole Inside"},"content":{"rendered":"

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

By all rights, they shouldn\u2019t exist.<\/p>\n

When NASA\u2019s James Webb Space Telescope (JWST) first opened its eyes to the distant past, it spotted hundreds of tiny, brilliant objects glowing red in the infant universe \u2014 just 600 million years after the Big Bang. These \u201clittle red dots,\u201d as astronomers came to call them, gleamed with such surprising brightness and density that they seemed to defy the basic rules of cosmology.<\/p>\n

\u201cIt\u2019s like finding a toddler who is six feet tall,\u201d said Anthony Taylor, a postdoctoral researcher at the University of Texas at Austin.<\/p>\n

At first, astronomers suspected they were looking at early, unusually compact galaxies. But further observations failed to match that idea. The dots were too small, too red, and too luminous. They didn\u2019t fit any known category of star or galaxy.<\/p>\n

Now, after months of mounting evidence, researchers are considering a radical new explanation. The little red dots might be an entirely new kind of cosmic object: black hole stars.<\/p>\n

A Black Hole Wrapped in Fire<\/p>\n

The idea goes like this: each dot is a massive cocoon of hot gas \u2014 larger than our solar system \u2014 that glows like a star. But instead of being powered by nuclear fusion, like regular stars, these objects shine because of the immense heat generated by a black hole hidden within.<\/p>\n

\u201cBasically, the gas is opaque and so it radiates like a star,\u201d explained Jenny Greene, an astrophysicist at Princeton University, in an interview with Science Mag<\/a>.<\/p>\n

The concept of a \u201cblack hole star\u201d is not entirely new. Theoretical physicist Mitch Begelman and colleagues first proposed it two decades ago under the name quasi-star. In that model, a giant star forms early in the universe, then collapses into a black hole. The black hole, instead of blowing away its outer layers, becomes shrouded in them. It keeps growing, heating the envelope of gas from within \u2014 turning the entire object into a single, swollen, glowing sphere.<\/p>\n

\u201cThat\u2019s what the quasi-star envelope is doing,\u201d Begelman told Science. \u201cIt\u2019s force-feeding the black hole by pushing matter into it.\u201d<\/p>\n

Not Dust, Not Galaxies, Not Stars<\/p>\n

The little red dots, or LRDs, first appeared in data from JWST\u2019s early deep-sky surveys. Since then, researchers have found around 340 of them across multiple programs, including the Advanced Deep Extragalactic Survey and the RUBIES survey. Each one is incredibly compact \u2014 often no wider than 500 light-years \u2014 and incredibly luminous, sometimes rivaling the brightness of a full-sized galaxy.<\/p>\n

\u201cIf you look at a very bright object in the early universe and assume it\u2019s all stars, it comes out looking extraordinarily massive \u2014 almost too massive to have assembled in the age of the universe up to that time,\u201d Taylor told Symmetry Magazine<\/a>.<\/p>\n

Initially, some scientists thought these might be galaxies full of aging stars, or obscured by dust. Dust, after all, can block ultraviolet and X-ray radiation and re-emit it as redder light, explaining both their color and dim X-ray signature.<\/p>\n

But this idea fell apart earlier this year. Using the Atacama Large Millimeter\/submillimeter Array (ALMA) and JWST\u2019s own mid-infrared instruments, astronomers searched for signs of dust in and around dozens of LRDs. They found none<\/a>.<\/p>\n

\u201cThey\u2019re not dusty,\u201d said Greene. \u201cWhat we\u2019re seeing is really the light that\u2019s coming from this thing, whatever it is.\u201d<\/p>\n

The spectral data only deepened the mystery. When astronomers broke down the light from these objects, they found the distinctive emission lines of hydrogen gas heated to extreme temperatures \u2014 exactly the kind of signal seen around active black holes. But oddly, there were also features typical of stellar atmospheres, like absorption lines and a red peak. One researcher described their spectral profile as \u201cV-shaped,\u201d sloping down in the ultraviolet and rising again in the optical.<\/p>\n

\u201cVery quickly a whole bunch of peculiarities began to emerge which showed that these are really nothing like any class of object that we really knew,\u201d said Rohan Naidu of MIT.<\/p>\n

Growing Monsters in a Hurry<\/p>\n

The deeper puzzle goes beyond what these objects are. It\u2019s what they become.<\/p>\n

Most large galaxies today \u2014 including the Milky Way \u2014 harbor supermassive black holes in their centers. But how these giants formed in just a few billion years remains an open question. One theory says they grew from small stellar black holes that merged and accreted material over time. Another posits the rapid birth of much larger \u201cseed\u201d black holes from events like direct gas collapse or quasi-stars.<\/p>\n

The little red dots seem to support the latter.<\/p>\n

If more evidence confirms that LRDs harbor accreting black holes, they could represent the formative phase of the supermassive black holes now scattered across the universe.<\/p>\n

In some cases, researchers estimate that the black hole inside an LRD might account for 10% to 50% of the object\u2019s total mass. That\u2019s wildly different from local galaxies, where the black hole usually weighs in at just 0.1% of the host galaxy\u2019s mass.<\/p>\n

\u201cEither they\u2019re very little black holes that are making copious amounts of light, or we\u2019re growing the black hole mass way faster than we ever thought before,\u201d said Greene. \u201cBoth of those are really exciting and interesting in different ways.\u201d<\/p>\n

Unfinished Answers, Accelerating Questions<\/p>\n

Despite the excitement, scientists are still cautious. There\u2019s no direct proof yet that black holes sit at the heart of every little red dot. The absence of X-rays, typically emitted by accreting black holes, remains a major puzzle.<\/p>\n

Many LRDs also show signs of features commonly associated with old stars, such as absorption lines and Balmer breaks \u2014 a sudden dip in light at certain wavelengths. But some researchers think the turbulent, dense gas around a black hole could mimic these same spectral traits.<\/p>\n

\u201cIt tells us they are the progenitors of some other population,\u201d said Akins. \u201cThen they evolve and become something else.\u201d<\/p>\n

And for now, little red dots seem to be a phenomenon frozen in time. They appeared in a narrow slice of cosmic history \u2014 between 600 million and 1.5 billion years after the Big Bang \u2014 and then disappeared. They don\u2019t show up in today\u2019s universe.<\/p>\n

That might be about to change. A team led by Xiaojing Lin of Tsinghua University recently reported several LRD-like objects just 2.5 billion light-years away<\/a>. These closer examples may give astronomers a better shot at resolving their internal structure.<\/p>\n

Lin\u2019s team has secured time on the Hubble Space Telescope to look for signs of interactions \u2014 outflows, inflows, and other disturbances \u2014 that might reveal how a black hole star operates.<\/p>\n

Meanwhile, the astronomy community is preparing for a flood of new JWST data. Many of the telescope\u2019s fourth-cycle observation programs, which began in July, will focus on little red dots. Some teams will search for short-term variations in brightness \u2014 a smoking gun for black holes. Others will hunt for the telltale signs of stellar aging.<\/p>\n

The field is still wide open. But the mystery, once a blur, is sharpening.<\/p>\n

And if the Milky Way itself was once a little red dot? \u201cI can totally imagine that,\u201d Greene added, \u201cand then it kind of piddled along for the rest of cosmic time.<\/p>\n","protected":false},"excerpt":{"rendered":"By all rights, they shouldn\u2019t exist. When NASA\u2019s James Webb Space Telescope (JWST) first opened its eyes to…\n","protected":false},"author":3,"featured_media":111955,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[3213,16814,70875,159,783,4810,67,132,68],"class_list":{"0":"post-111954","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-space","8":"tag-black-hole","9":"tag-milky-way","10":"tag-red-dots","11":"tag-science","12":"tag-space","13":"tag-stars","14":"tag-united-states","15":"tag-unitedstates","16":"tag-us"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/114957064034632672","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/111954","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=111954"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/111954\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/111955"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=111954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=111954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=111954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}