JWST tagged posts

JWST reveals that newborn planets are racing against powerful winds and radiation before their supply of planet-building gas disappears. JWST has revealed that young planetary systems lose their planet-building gas through a changing mix of powerful jets, molecular winds, and radiation-driven outflows. As the disks age and their gas disappears, giant planets face a shrinking window to build massive atmospheres.

Planets take shape inside disks of gas and dust surrounding young stars, but the supply of gas they depend on is temporary...

Of all the discoveries from the James Webb Space Telescope, the multitude of Little Red Dots it has observed is among the most enigmatic. Now, simulations using the Japanese Supercomputer ATERUI III have explained the nature of the Little Red Dots without requiring any exotic assumptions. The simulations show that the Little Red Dots are black holes growing at a rate that would be impossible today because of conditions in the early universe.

In the study, published in the journal Nature, a research team led by Sunmyon Chon at the Max Planck Institute for Astrophysics used the ATERUI I...

In dark skies at night, distant starlight twinkles and speaks to vast cosmic histories almost as old as time itself. New data from instruments such as NASA’s James Webb Space Telescope are helping astrophysicists probe deep cosmic mysteries, including the evolution of black holes and galaxies.

Using supercomputers to help make sense of the data, researchers from multiple institutions worked together to complete the largest cosmological hydrodynamic simulation, called ASTRID—a mind-boggling computational run that traces the evolution of the universe from its earliest times to the present.

“The most important information about our recent study is that we’ve evolved the ASTRID simulation to z = 0, and that these data are available,” said Yihao Zhou, a Ph.D...

Astronomers may have uncovered an entirely new cosmic object: a gigantic “black hole star” that could explain the mysterious red dots filling the early universe...