Tag

Black Hole Growth

All articles tagged with #black hole growth

space5 hours ago•12 min saved

Webb spots colossal early black holes that dwarf their host galaxies, upending growth theories

Webb observations of the early universe reveal a population of compact red objects hosting actively accreting black holes that, in some cases, rival or exceed the host galaxy’s stellar mass, challenging the standard coevolution picture; proposed explanations include unusually heavy seed black holes and bursts of rapid accretion, with spectroscopy and time-lapse imaging of the gas around these black holes planned to help determine how these giants formed.

via Space Daily|

#black-hole-growth #early-universe #galaxy-evolution

science10 days ago•3 min saved

Tiny Red Dots in the Early Universe Spur a New Quasi-Star Theory

The James Webb Space Telescope spotted a population of compact red sources in the early universe. A quasi-star model—an unusually light black hole (~100,000 solar masses) embedded in a dense gas envelope—reproduces many observed features of these little red dots, including their brightness in visible/IR and hydrogen emission, suggesting rapid black hole growth within protogalaxies. The model, however, struggles to predict ultraviolet brightness and certain spectral/dust signatures, leaving questions for future observations.

via BBC Sky at Night Magazine|

#black-hole-growth #james-webb-space-telescope #little-red-dots

science1 year ago•8 min saved

Primordial Black Holes from the Big Bang May Have Grown into Supermassive Sizes

Recent cosmological simulations suggest that primordial black holes formed shortly after the Big Bang could have rapidly grown into supermassive black holes, potentially explaining the presence of such massive objects in the early universe, as observed by the James Webb Space Telescope. This theory offers an alternative to traditional growth models, proposing that primordial black holes, which do not rely on star collapse, could have had a head start in accumulating mass and settling at galactic centers.

via Space|

#black-hole-growth #cosmological-simulations #early-universe

science-and-astronomy3 years ago•9 min saved

Unveiling the Rapid Growth and Recoiling Speed of Supermassive Black Holes

Scientists are puzzled by the rapid growth of supermassive black holes in the early universe, as their existence challenges existing theories of black hole growth. The discovery of supermassive black holes with masses equivalent to billions of suns just 13 billion years after the Big Bang raises questions about how they could have grown so quickly. One possible explanation is the concept of "heavy seeds," where supermassive black holes start off much larger than previously thought. The launch of the Laser Interferometer Space Based Antenna (LISA) is expected to provide more insights into the demographics of black holes in the early universe and potentially solve this mystery within the next 5 to 10 years.

via Space.com|

#black-hole-growth #early-universe #james-webb-space-telescope

science3 years ago•3 min saved

Rapid Growth of Supermassive Black Holes Revealed in Study

A new study suggests that supermassive black holes may grow faster than previously believed, indicating that they may have been larger billions of years ago. Using novel computer modeling methods, researchers have found a larger selection of big galaxies and huge supermassive black holes in the early universe than currently predicted. This challenges the idea that there hasn't been enough time for these cosmic titans to grow to such tremendous sizes. Understanding the masses of black holes is crucial for studying the gravitational wave background, galaxy formation, and the evolution of the universe.

via Space.com|

#black-hole-growth #early-universe #galaxy-formation