Tag

Epoch Of Reionization

All articles tagged with #epoch of reionization

space27 days ago•3 min saved

Webb Discovers Ultra-Early Galaxy MoM-z14 That Challenges Early-Universe Theories

NASA's James Webb Space Telescope identified the galaxy MoM-z14 as it appeared about 280 million years after the Big Bang (redshift 14.44), meaning light has traveled roughly 13.5 billion years. Its brightness and nitrogen enrichment exceed predictions for such an early object, challenging current models and hinting at new physics or star-formation pathways during the epoch of reionization; follow-up spectroscopy is needed to confirm details and refine our picture of the early Universe.

via BBC Sky at Night Magazine|

#early-universe #epoch-of-reionization #galaxy-formation

astronomy1 month ago•45 min saved

Tiny galaxies vanish from the early universe, study suggests

A JWST-backed study using gravitational lensing of galaxy cluster Abell 2744 analyzes faint, distant galaxies from the Epoch of Reionization. It finds a drop-off in ultrafaint galaxies—faint-end suppression—contradicting the expectation that there should be many more tiny galaxies. The result implies early radiation heated surrounding gas, preventing star formation in low‑mass halos and challenging the idea that the smallest galaxies powered reionization; however, conclusions depend on the cluster's lens model, and more JWST data across additional clusters are needed to confirm whether this is a universal trend.

via Space|

#abell-2744 #astronomy #dwarf-galaxies

science4 months ago•3 min saved

Early Stars Formed in a 'Pre-Heated' Universe, Study Finds

A new study suggests the early universe was 'pre-heated' before the Epoch of Reionization, challenging previous assumptions of an ultracold beginning, likely due to X-ray emissions from early black holes and stellar remnants, with ongoing radio telescope efforts to detect signals from this era.

via ScienceAlert|

#cosmic-dawn #epoch-of-reionization #pre-heated

science5 months ago•4 min saved

Scientists Discover Potential First Black Hole Formed in the Big Bang Era

A recent study suggests that a red light source observed by JWST, named QSO1, may be the first direct evidence of a primordial black hole formed shortly after the Big Bang, potentially shedding light on early black hole and galaxy formation processes.

via ScienceAlert|

#black-hole-formation #cosmology #epoch-of-reionization

science-and-technology1 year ago•2 min saved

First-Ever Merging Quasars Spotted at Cosmic Dawn

Astronomers have discovered the first-ever merging galaxy cores containing two supermassive black holes from the cosmic dawn, just 900 million years after the Big Bang. This finding, confirmed using the Subaru Telescope's Hyper Suprime-Cam, provides new insights into the formation of supermassive black holes and the evolution of galaxies during the Epoch of Reionization.

via Livescience.com|

#astronomy #black-holes #cosmic-dawn

astronomy2 years ago•6 min saved

Astronomers Unveil the Faintest Galaxy in Cosmic History

Astronomers have confirmed the existence of the faintest galaxy known in the early universe using the James Webb Space Telescope and gravitational lensing. The galaxy, called JD1, was observed as it was when the universe was only 480 million years old. This discovery provides insights into the epoch of reionization and allows astronomers to study the structure and formation of early galaxies.

via IFLScience|

#astronomy #early-universe #epoch-of-reionization

astronomy2 years ago•5 min saved

Astronomers Confirm Faintest Galaxy Ever Seen, Rewriting Cosmic History

Astronomers using the James Webb Space Telescope have confirmed the existence of the faintest galaxy known in the early universe. The galaxy, called JD1, was observed when the universe was only 480 million years old. The intense ultraviolet light from the first generations of stars and galaxies is believed to have burned through the hydrogen fog that obscured the early universe, transforming it into the transparent universe we see today. By studying these faint galaxies, astronomers can gain insights into the epoch of reionization and the building blocks that shaped the universe.

via The Conversation|

#astronomy #early-universe #epoch-of-reionization

astronomy2 years ago•3 min saved

"Dark Energy Theory May Explain Early Universe Radiation"

New research suggests that the strange radiation signal emitted when the first stars appeared in the universe may be evidence of an evolving, dynamic kind of dark energy. Astrophysicist Lu Yin has explored a model called interacting Chevallier-Polarski-Linder dark energy, or ICPL, which allows for dark energy to interact with dark matter, resulting in changes in the acceleration rate of expansion. Yin found that this ICPL model caused stars and galaxies to appear earlier than in standard cosmological models, which made the ICPL model better at accounting for the strange observed 21-cm signal compared with traditional cosmological models.

via Yahoo! Voices|

#21-cm-signal #astronomy #cosmic-dawn

science-and-technology2 years ago•3 min saved

James Webb Space Telescope reveals ancient galaxies in unprecedented detail.

The James Webb Space Telescope has captured an image of 45,000 galaxies, including 700 new discoveries, some of which are the youngest ever observed. The telescope's unprecedented detail is helping scientists understand the secrets of our early universe, including the Epoch of Reionization. The discovery of strong emission lines in the young galaxies suggests that hot, massive star formation could have been a key driver of the epoch. Webb's observation of the Great Observatories Origins Deep Survey is part of its JWST Advanced Deep Extragalactic Survey program.

via Yahoo! Voices|

#early-universe #epoch-of-reionization #galaxies

science2 years ago•2 min saved

James Webb Space Telescope captures stunning images of ancient galaxies.

The James Webb Space Telescope has captured an image of 45,000 galaxies, including 700 new discoveries, some of which are the youngest ever observed. The telescope's unprecedented detail is helping scientists unveil the secrets of our early universe, including the Epoch of Reionization. By studying the light signatures of these young galaxies, astronomers have spotted strong emission lines indicating intense recent star formation, suggesting that the burst of hot, massive star formation in young galaxies could have been a key driver of the Epoch of Reionization.

via Business Insider|

#early-universe #epoch-of-reionization #galaxies