Researchers find that dark stars could be the origin of the first supermassive black holes, producing a dominant contribution to the observed gravitational-wave background. The study uses pulsar timing arrays to probe the early Universe and constrain the abundance of ancient black hole seeds.
A recent study suggests that dark stars could provide solutions to three pressing puzzles of the high-redshift universe: blue monster galaxies, overmassive black hole galaxies, and little red dots. Dark stars form in dark matter-rich environments and can grow to become supermassive, complementing standard models of galaxy formation.
Recent study identifies four extremely distant objects consistent with supermassive dark stars, which could explain the formation of supermassive black holes. The presence of a 'smoking gun signature' absorption feature at 1640 Angstrom in one of the objects suggests their existence.
Researchers propose that dark matter may have originated from a separate 'Dark Big Bang,' occurring shortly after the universe's birth. The study explores possible scenarios for this new theory and determines potential observable consequences, including gravitational waves detectable by future experiments.
Researchers found Antarctic summer thaw occurs nearly a month earlier than previously believed, lasting two months longer. This extended melt is beneficial for organisms needing meltwater but poses a threat to permafrost stability.
Researchers have developed a method that maps time-varying brain responses to images, revealing how the brain processes visual information. The new technique, DETI mapping, produces a multiplexed view of neural signals across different locations and over time.
A new analysis reveals Mars underwent 6-20 separate ice ages during the past 300-800 million years, with rocks trapped in glaciers providing a natural experiment. The findings hold implications for planetary geology and space exploration, including the potential for life on Mars.
Severe damage to male maple trees caused them to flower as females two years later, suggesting a threshold for sex-determining cues. This research supports the idea that changes in sugar concentration in female trees might be a consequence of injury and physical damage.