Articles tagged with Reionization
Researchers found that reionization-driven turbulence can power the turbulent dynamo, amplifying weak magnetic fields over time. This mechanism relies on established physics rather than exotic particles or forces, explaining the origin of intergalactic magnetic fields.
A team of researchers has observed a massive galaxy cluster that challenges existing models of the universe's evolution. The cluster's unusual structure and high density of cold, neutral hydrogen gas suggest a different history than previously thought. This discovery raises questions about the fate of large structures in the universe.
Astronomers discover galaxy Virgil with dual personality – ordinary in visible light but harboring massive black hole. JWST observations reveal hidden nature of Virgil, challenging current models of black hole formation.
Astronomers discovered three ultra-faint dwarf galaxies in an isolated region of space, containing only very old stars. The findings support the theory that events in the early universe cut off star formation in small galaxies.
Researchers have discovered three tiny ultra-faint dwarf galaxies, dubbed 'stellar-ghost-town' galaxies, with minimal gas and old stars. This suggests that their star formation was cut off early in the universe's history due to insufficient gravity or events like reionization or supernovae explosions.
The International Gemini Observatory and Subaru Telescope have discovered the most distant pair of merging quasars, seen only 900 million years after the Big Bang. The team used follow-up spectroscopy to confirm the nature of the quasar pair and their host galaxies.
The study reveals small galaxies produced a significant amount of ionizing photons, exceeding the threshold required for reionization. This suggests low-mass galaxies were strong candidates for sparking the process by heating and ionizing the surrounding gas.
A new study using JWST data shows that small galaxies played a major role in cosmic reionization, outnumbering massive galaxies by a factor of 100. These findings contradict current theories and suggest that low-mass galaxies were responsible for the ionizing photons required for reionization.
Researchers observed the core region of the protocluster A2744z7p9OD using JWST and detected ionized oxygen-ion light from four galaxies at a distance of 13.14 billion light-years away. The team also detected cosmic dust emissions from three of the four galaxies, indicating that many first-generation stars have completed their lives.
New data from NASA's James Webb Space Telescope shows that galaxies' stars emitted enough light to heat and ionize the gas around them, clearing our collective view over hundreds of millions of years. The research team identified galaxies near quasars and found that they are generally surrounded by transparent regions about 2 million l...
The HERA team has improved the sensitivity of a radio telescope, allowing them to detect radio waves from the cosmic dawn era. The data suggests that early galaxies contained few elements besides hydrogen and helium, unlike modern galaxies.
The Hydrogen Epoch of Reionization Array (HERA) team has doubled the sensitivity of its radio telescope array, providing clues to the composition of stars and galaxies in the early universe. The data suggest that early galaxies contained few elements besides hydrogen and helium.
Researchers at the Center for Astrophysics created a suite of simulations named Thesan, resolving interactions in the early universe with unprecedented detail. The simulations capture properties of early galaxies and how light impacts gas, spanning over 300 million light years across.
Scientists will use six distant quasars to study galaxy evolution, supermassive black hole formation, and gas in the intergalactic medium. The team will examine the properties of these quasars and their host galaxies during the first stages of galaxy evolution.
Researchers observed the first-ever galaxy in a 'blow-away' state, which suggests that small galaxies were responsible for reionization. The study reveals that intense star-formation can cause galaxies to lose their hydrogen clouds, allowing high energy light to escape.
The discovery of Po?niua??ena, the second-most distant quasar, sheds light on the formation of massive black holes and galaxies in the young universe. The quasar's existence challenges current theories, requiring a new mechanism to explain its massive size formed so early in the universe's history.
Astronomers have discovered a distant galaxy, MACS1423-z7p64, which is about 13.1 billion years old and falls within the 'Epoch of Reionization.' The team used a giant lens in the sky to magnify its brightness and analyze its spectrum.
Astronomers using ALMA detected a clear signal from oxygen in a galaxy 13.1 billion light-years away, revealing insights into cosmic reionization. The detection of ionized oxygen is crucial for understanding the early Universe and the formation of galaxies.
An international team has discovered a compact galaxy emitting a large number of ionizing photons, confirming the hypothesis that galaxies were responsible for cosmic reionization. The 'green pea' galaxy J0925 was found to be ejecting ionizing photons with unprecedented intensity.
A team of scientists has found that compact dwarf galaxies, like the green pea galaxy J0925+1403, could explain cosmic reionization by ejecting ionizing photons into the intergalactic medium. This discovery opens a new avenue for understanding the early universe's 14 billion-year history.
A team of Caltech researchers detects a galaxy called EGS8p7, which is more than 13.2 billion years old, making it the farthest galaxy ever found. The detection challenges our understanding of the universe's evolution, particularly reionization.
Researchers at Georgia Tech and UC San Diego found that tiny galaxies contributed nearly 30% of UV light during reionization, marking a significant shift from previous focus on larger galaxies. Simulations show that small galaxies' high abundance and lower gas density allowed for more UV light to escape, illuminating the early universe.
A new study reveals that tiny galaxies over 13 billion years ago contributed nearly 30 percent of UV light during reionization. These small galaxies formed stars and released UV light, which helped strip interstellar hydrogen of electrons.
Researchers found that Green Pea galaxies, compact and highly star-forming, may leak ionizing radiation. This could confirm the prevailing theory of reionization during the Big Bang's early stages.
New data reveals galaxies formed and fully illuminated the universe by 750 million years old, ending sooner than expected. The epoch of reionization lasted less than 500 million years and was triggered by monster galaxies with over a billion stars.
Researchers detect signal from the Epoch of Reionization, a period 13 billion years ago when the universe was dark and hydrogen gas dominated. The discovery provides insights into how the first galaxies formed and evolved, shedding light on the early universe's history.
Researchers used a custom-made filter to find 22 early galaxies and confirmed the age of one at 787 million years post-Big Bang. The findings suggest that reionization likely began during this era, with star-formation rates significantly lower than expected.