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By NASA
This illustration shows a red, early-universe dwarf galaxy that hosts a rapidly feeding black hole at its center. Using data from NASA’s James Webb Space Telescope and Chandra X-ray Observatory, a team of astronomers have discovered this low-mass supermassive black hole at the center of a galaxy just 1.5 billion years after the Big Bang. It is pulling in matter at a phenomenal rate — over 40 times the theoretical limit. While short lived, this black hole’s “feast” could help astronomers explain how supermassive black holes grew so quickly in the early universe.NOIRLab/NSF/AURA/J. da Silva/M. Zamani A rapidly feeding black hole at the center of a dwarf galaxy in the early universe, shown in this artist’s concept, may hold important clues to the evolution of supermassive black holes in general.
Using data from NASA’s James Webb Space Telescope and Chandra X-ray Observatory, a team of astronomers discovered this low-mass supermassive black hole just 1.5 billion years after the big bang. The black hole is pulling in matter at a phenomenal rate — over 40 times the theoretical limit. While short lived, this black hole’s “feast” could help astronomers explain how supermassive black holes grew so quickly in the early universe.
Supermassive black holes exist at the center of most galaxies, and modern telescopes continue to observe them at surprisingly early times in the universe’s evolution. It’s difficult to understand how these black holes were able to grow so big so rapidly. But with the discovery of a low-mass supermassive black hole feasting on material at an extreme rate so soon after the birth of the universe, astronomers now have valuable new insights into the mechanisms of rapidly growing black holes in the early universe.
The black hole, called LID-568, was hidden among thousands of objects in the Chandra X-ray Observatory’s COSMOS legacy survey, a catalog resulting from some 4.6 million Chandra observations. This population of galaxies is very bright in the X-ray light, but invisible in optical and previous near-infrared observations. By following up with Webb, astronomers could use the observatory’s unique infrared sensitivity to detect these faint counterpart emissions, which led to the discovery of the black hole.
The speed and size of these outflows led the team to infer that a substantial fraction of the mass growth of LID-568 may have occurred in a single episode of rapid accretion.
LID-568 appears to be feeding on matter at a rate 40 times its Eddington limit. This limit relates to the maximum amount of light that material surrounding a black hole can emit, as well as how fast it can absorb matter, such that its inward gravitational force and outward pressure generated from the heat of the compressed, infalling matter remain in balance.
These results provide new insights into the formation of supermassive black holes from smaller black hole “seeds,” which current theories suggest arise either from the death of the universe’s first stars (light seeds) or the direct collapse of gas clouds (heavy seeds). Until now, these theories lacked observational confirmation.
The new discovery suggests that “a significant portion of mass growth can occur during a single episode of rapid feeding, regardless of whether the black hole originated from a light or heavy seed,” said International Gemini Observatory/NSF NOIRLab astronomer Hyewon Suh, who led the research team.
A paper describing these results (“A super-Eddington-accreting black hole ~1.5 Gyr after the Big Bang observed with JWST”) appears in the journal Nature Astronomy.
About the Missions
NASA’s Marshall Space Flight Center manages the Chandra program. The Smithsonian Astrophysical Observatory’s Chandra X-ray Center controls science operations from Cambridge, Massachusetts, and flight operations from Burlington, Massachusetts.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
Read more from NASA’s Chandra X-ray Observatory.
Learn more about the Chandra X-ray Observatory and its mission here:
https://www.nasa.gov/chandra
https://chandra.si.edu
News Media Contact
Elizabeth Laundau
NASA Headquarters
Washington, DC
202-923-0167
elizabeth.r.landau@nasa.gov
Lane Figueroa
Marshall Space Flight Center, Huntsville, Alabama
256-544-0034
lane.e.figueroa@nasa.gov
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By NASA
NASA/Matthew Dominick NASA astronaut Matthew Dominick captured this timelapse photo of Comet C/2023 A3 (Tsuchinshan-ATLAS) International Space Station as it orbited 272 miles above the South Pacific Ocean southeast of New Zealand just before sunrise on Sept. 28, 2024. At the time, the comet was about 44 million miles away from Earth.
Though the comet is very old, it was just discovered in 2023, when it approached the inner solar system on its highly elliptical orbit for the first time in documented human history. Beginning in mid-October 2024, Comet C/2023 A3 (Tsuchinshan-ATLAS) will become visible low in the west following sunset. If the comet’s tail is well-illuminated by sunlight, it could be visible to the unaided eye. Oct. 14-24 is the best time to observe, using binoculars or a small telescope.
The comet hails from the Oort Cloud, which scientists think is a giant spherical shell surrounding our solar system. It is like a big, thick-walled bubble made of icy pieces of space debris the sizes of mountains and sometimes larger. The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt and may contain billions, or even trillions, of objects.
Image Credit: NASA/Matthew Dominick
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By European Space Agency
Using the NASA/ESA/CSA James Webb Space Telescope, scientists observed the region above Jupiter’s iconic Great Red Spot to discover a variety of previously unseen features. The region, previously believed to be unremarkable in nature, hosts a variety of intricate structures and activity.
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By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
A red giant star and white dwarf orbit each other in this animation of a nova similar to T Coronae Borealis. The red giant is a large sphere in shades of red, orange, and white, with the side facing the white dwarf the lightest shades. The white dwarf is hidden in a bright glow of white and yellows, which represent an accretion disk around the star. A stream of material, shown as a diffuse cloud of red, flows from the red giant to the white dwarf. When the red giant moves behind the white dwarf, a nova explosion on the white dwarf ignites, creating a ball of ejected nova material shown in pale orange. After the fog of material clears, a small white spot remains, indicating that the white dwarf has survived the explosion.NASA/Goddard Space Flight Center Around the world this summer, professional and amateur astronomers alike will be fixed on one small constellation deep in the night sky. But it’s not the seven stars of Corona Borealis, the “Northern Crown,” that have sparked such fascination.
It’s a dark spot among them where an impending nova event – so bright it will be visible on Earth with the naked eye – is poised to occur.
“It’s a once-in-a-lifetime event that will create a lot of new astronomers out there, giving young people a cosmic event they can observe for themselves, ask their own questions, and collect their own data,” said Dr. Rebekah Hounsell, an assistant research scientist specializing in nova events at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “It’ll fuel the next generation of scientists.”
T Coronae Borealis, dubbed the “Blaze Star” and known to astronomers simply as “T CrB,” is a binary system nestled in the Northern Crown some 3,000 light-years from Earth. The system is comprised of a white dwarf – an Earth-sized remnant of a dead star with a mass comparable to that of our Sun – and an ancient red giant slowly being stripped of hydrogen by the relentless gravitational pull of its hungry neighbor.
The hydrogen from the red giant accretes on the surface of the white dwarf, causing a buildup of pressure and heat. Eventually, it triggers a thermonuclear explosion big enough to blast away that accreted material. For T CrB, that event appears to reoccur, on average, every 80 years.
Don’t confuse a nova with a supernova, a final, titanic explosion that destroys some dying stars, Hounsell said. In a nova event, the dwarf star remains intact, sending the accumulated material hurtling into space in a blinding flash. The cycle typically repeats itself over time, a process which can carry on for tens or hundreds of thousands of years.
“There are a few recurrent novae with very short cycles, but typically, we don’t often see a repeated outburst in a human lifetime, and rarely one so relatively close to our own system,” Hounsell said. “It’s incredibly exciting to have this front-row seat.”
Finding T Coronae Borealis
A conceptual image of how to find Hercules and the “Northern Crown” in the night sky, created using planetarium software. Look up after sunset during summer months to find Hercules, then scan between Vega and Arcturus, where the distinct pattern of Corona Borealis may be identified. NASA The first recorded sighting of the T CrB nova was more than 800 years ago, in autumn 1217, when a man named Burchard, abbot of Ursberg, Germany, noted his observance of “a faint star that for a time shone with great light.”
The T CrB nova was last seen from Earth in 1946. Its behavior over the past decade appears strikingly similar to observed behavior in a similar timeframe leading up to the 1946 eruption. If the pattern continues, some researchers say, the nova event could occur by September 2024.
What should stargazers look for? The Northern Crown is a horseshoe-shaped curve of stars west of the Hercules constellation, ideally spotted on clear nights. It can be identified by locating the two brightest stars in the Northern Hemisphere – Arcturus and Vega – and tracking a straight line from one to the other, which will lead skywatchers to Hercules and the Corona Borealis.
The outburst will be brief. Once it erupts, it will be visible to the naked eye for a little less than a week – but Hounsell is confident it will be quite a sight to see.
A coordinated scientific approach
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Watch V407 Cyg go nova! In this animation, gamma rays (magenta) arise when accelerated particles in the explosion's shock wave crash into the red giant's stellar wind.NASA/Conceptual Image Lab/Goddard Space Flight Center Dr. Elizabeth Hays, chief of the Astroparticle Physics Laboratory at NASA Goddard, agreed. She said part of the fun in preparing to observe the event is seeing the enthusiasm among amateur stargazers, whose passion for extreme space phenomena has helped sustain a long and mutually rewarding partnership with NASA.
“Citizen scientists and space enthusiasts are always looking for those strong, bright signals that identify nova events and other phenomena,” Hays said. “Using social media and email, they’ll send out instant alerts, and the flag goes up. We’re counting on that global community interaction again with T CrB.”
Hays is the project scientist for NASA’s Fermi Gamma-ray Space Telescope, which has made gamma-ray observations from low Earth orbit since 2008. Fermi is poised to observe T CrB when the nova eruption is detected, along with other space-based missions including NASA’s James Webb Space Telescope, Neil Gehrels Swift Observatory, IXPE (Imaging X-ray Polarimetry Explorer), NuSTAR (Nuclear Spectroscopic Telescope Array), NICER (Neutron star Interior Composition Explorer), and the European Space Agency’s INTEGRAL (Extreme Universe Surveyor). Numerous ground-based radio telescopes and optical imagers, including the National Radio Astronomy Observatory’s Very Large Array in Mexico, also will take part. Collectively, the various telescopes and instruments will capture data across the visible and non-visible light spectrum.
“We’ll observe the nova event at its peak and through its decline, as the visible energy of the outburst fades,” Hounsell said. “But it’s equally critical to obtain data during the early rise to eruption – so the data collected by those avid citizen scientists on the lookout now for the nova will contribute dramatically to our findings.”
For astrophysics researchers, that promises a rare opportunity to shed new light on the structure and dynamics of recurring stellar explosions like this one.
“Typically, nova events are so faint and far away that it’s hard to clearly identify where the erupting energy is concentrated,” Hays said. “This one will be really close, with a lot of eyes on it, studying the various wavelengths and hopefully giving us data to start unlocking the structure and specific processes involved. We can’t wait to get the full picture of what’s going on.”
Some of those eyes will be very new. Gamma-ray imagers didn’t exist the last time T CrB erupted in 1946, and IXPE’s polarization capability – which identifies the organization and alignment of electromagnetic waves to determine the structure and internal processes of high-energy phenomena – is also a brand-new tool in X-ray astronomy. Combining their data could offer unprecedented insight into the lifecycles of binary systems and the waning but powerful stellar processes that fuel them.
Is there a chance September will come and go without the anticipated nova outburst from T CrB? Experts agree there are no guarantees – but hope abides.
“Recurrent novae are unpredictable and contrarian,” said Dr. Koji Mukai, a fellow astrophysics researcher at NASA Goddard. “When you think there can’t possibly be a reason they follow a certain set pattern, they do – and as soon as you start to rely on them repeating the same pattern, they deviate from it completely. We’ll see how T CrB behaves.”
Learn more about NASA astrophysics at:
https://science.nasa.gov/astrophysics
Jonathan Deal
Marshall Space Flight Center, Huntsville, Ala.
256-544-0034
jonathan.e.deal@nasa.gov
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