A team of astronomers from Instituto Nacional of Astrofísica (INAF), at Itália, announced a monumental discovery made with Telescópio Espacial James Webb (JWST). Trata is a supermassive black hole, dubbed BiRD (Big Ponto Vermelho), whose light has traveled approximately 10 billion years to reach us, offering a rare glimpse into a primordial era of the universe.
The cosmic object, with a mass estimated at 100 million times that of our Sol, was identified as an extremely bright, point source of light in infrared images captured by the telescope’s NIRCam instrument. Localizado in the vicinity of quasar J1030+0524, BiRD had no records in previous X-ray or radio catalogues, which highlights the unique ability of James Webb to unveil previously invisible phenomena.
The detection comes at a crucial moment for cosmology, as BiRD belongs to a mysterious class of objects that could be the key to understanding how supermassive black holes grew so rapidly in the early cosmos. Sua’s existence in the period known as “cosmic noon”, about 4 billion years after Big Bang, provides valuable data about the most intense phase of star and galaxy formation.
The James Webb technology behind the discovery
The success of this observation is largely due to JWST’s NIRCam (Near-Infrared Camera) instrument, designed to capture light in the infrared spectrum. Essa capability allows the telescope to penetrate the dense clouds of cosmic gas and dust that obscure many of the universe’s most energetic events, revealing structures that have remained hidden to telescopes operating in other bands of the light spectrum.
When analyzing the field around quasar J1030+0524, BiRD immediately stood out as an outlier, a point source of exceptional brightness that did not correspond to any known object. The lack of previous detections in X-ray and radio surveys confirmed that it was a distinct phenomenon, the nature of which could only be revealed by the unprecedented sensitivity of James Webb in the infrared.
The mystery of ‘little red dots’ in the universe
Since beginning operations in 2022, JWST has revealed a new class of enigmatic objects, dubbed “little red dots” or LRDs. Esses objects appear as compact, reddish patches in deep-field images and defy conventional theories about the formation of black holes and galaxies, mainly because they do not emit the intense X-rays expected from feeding black holes.
The leading hypothesis seeking to explain the nature of LRDs suggests that they are the “seeds” of future supermassive black holes. Esses objects would be surrounded by a thick cocoon of gas and dust, a kind of envelope that absorbs almost all high-energy radiation, such as X-rays, but allows infrared light, with a longer wavelength, to escape and be detected by James Webb.
This layer of obscure material would explain the mystery of its appearance. Enquanto the central black hole feeds voraciously on the matter around it, the energy released is “filtered” by the envelope, making the object practically invisible to X-ray observatories.
BiRD, however, stands out among LRDs for its extraordinary luminosity. Scientists believe it may represent a transient, extremely fast-growing phase, a time when the black hole is accumulating mass at an exceptional rate. Isso makes it a perfect cosmic laboratory for studying the mechanisms that allowed the formation of cosmic giants in a short space of time.
Spectral analysis reveals the identity of BiRD
To confirm the nature of BiRD, the research team carried out a detailed analysis of its light spectrum. The result revealed strong ionized hydrogen absorption lines, in particular the Paschen gamma line, as well as helium signals. Esses spectral markers are crucial, as they allow you to accurately calculate the distance to the object and estimate its physical properties, such as mass.
Federica Loiacono, INAF researcher and leader of the study, explained that the spectrum obtained was not compatible with that of a common star. The observed characteristics, such as the width of the spectral lines and the chemical properties, unequivocally pointed to an active black hole, surrounded by high-density gas and with strong signs of winds or flows of matter being expelled into space.
The analysis also showed that BiRD shares striking features with two other already confirmed LRDs, known as “Rosetta Stone” (with redshift z ≈ 2.26) and RUBIES-BLAGN-1 (z ≈ 3.1). The similarity in the central black hole’s mass and helium lines suggests they form a rare family of objects, providing multiple examples to test theoretical models about cosmic evolution.
The unique characteristics that differentiate the object
BiRD is distinguished from other LRDs by its remarkable luminosity and its prominent position in the imaging field around quasar J1030. Essa combination makes it a much more accessible target for detailed study compared to other red dots, which are generally fainter and require significantly longer observation times. Analysis of its light revealed not only its composition, but also the presence of “outflows”, which are streams of gas being ejected at high speeds, a phenomenon associated with intense black hole feeding activity.
The complete absence of X-ray emissions strongly reinforces the dense envelope theory. Esse cocoon of gas and dust is so thick that it absorbs all the high-energy radiation generated near the black hole’s event horizon. At the same time, the width of the lines in its spectrum indicates that matter orbits the black hole at dizzying speeds, confirming the presence of an extremely massive and compact object at its center. Essa dual signature—intense infrared brightness and X-ray silence—provides a clear profile of a crucial and brief phase in the evolution of a supermassive black hole.
Implications for the formation of cosmic giants
The discovery of objects like BiRD is revolutionizing extragalactic astrophysics by challenging conventional models of black hole growth. One of the biggest unknowns in cosmology is how these cosmic giants managed to reach masses billions of times that of Sol in less than a billion years after Big Bang. Traditional models, based on gradual growth from star remains, cannot explain this timescale. The existence of BiRD and other LRDs supports alternative theories, such as “direct collapse”, in which massive clouds of primordial gas collapse directly to form “seeds” of black holes already with tens of thousands of solar masses. Esse more robust starting point would allow accelerated growth through merger with other black holes and continued accretion of matter. BiRD, with its already substantial mass during cosmic noon, perfectly exemplifies this rapid evolutionary pathway. Estimates of the abundance of LRDs in this era suggest that this was not an isolated event, but rather an efficient and common mechanism that helped sculpt the early universe.
A new chapter in the exploration of cosmic noon
Telescópio Espacial James Webb was specifically designed to peer into the depths of time and space, and discoveries like BiRD’s demonstrate that it is successfully carrying out its mission. The telescope has opened a new window into the “cosmic noon”, revealing a dynamic universe teeming with activity that was previously completely hidden from our view, shrouded in veils of dust.
Building on this success, scientists plan to expand the search for other LRDs in different regions of the sky. The goal is to build a statistically significant sample of these objects to map their distribution, understand their properties, and quantify their role in the joint evolution of black holes and galaxies during the earliest phases of the universe’s history.
Publication and scientific collaboration
The detailed results of this research were published in the prestigious scientific journal Astronomy &
