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Unlocking the secrets of a "hot Saturn" and its spotted star

Researchers used the James Webb Space Telescope to analyze the atmospheric composition of HAT-P-18 b, detecting water vapour and carbon dioxide. They also found a cloud deck that mutes the signals of many molecules, and their findings suggest the star's surface is covered by dark spots. The study highlights the importance of considerin...

SourceUniversity of Montreal·JournalMonthly Notices of the Royal Astronomical Society·DateJan 9, 2024

Giant doubts about giant exomoons

New research from the Max Planck Institute challenges previous claims of giant exomoons around Kepler-1625b and Kepler-1708b. The study uses a computer algorithm to analyze observations, finding that 'planet-only' interpretations are more conclusive than initially thought.

SourceMax-Planck-Gesellschaft·JournalNature Astronomy·TypeData/statistical analysis·DateDec 7, 2023

Remarkably detailed view of “teenage galaxies” from just 2 to 3 billion years after the Big Bang revealed by JWST

Astronomers using the JWST have created the deepest spectrum of a distant galaxy ever seen, revealing the presence of eight distinct elements including nickel. The study helps scientists understand how galaxies mature and evolve over time, with surprising findings on the chemical composition of ancient galaxies.

SourceCarnegie Institution for Science·JournalThe Astrophysical Journal Letters·TypeObservational study·DateNov 20, 2023

Webb follows neon signs toward new thinking on planet formation

The James Webb Space Telescope has detected distinct neon signatures in the dusty disk surrounding the young Sun-like star SZ Chamaelontis, indicating a change in high-energy radiation that reaches the disk and limits planet formation time. This difference points to a variable wind absorbing UV light and leaving X-rays to pummel the disk.

SourceNASA/Goddard Space Flight Center·JournalThe Astrophysical Journal Letters·DateNov 15, 2023

An ammonia trail to exoplanets

A team of researchers has detected ammonia isotopologues in the atmosphere of a cold brown dwarf, providing new clues to understanding gas giant formation. The ratio of two isotopologues reveals that the exoplanet formed through gravitational collapse, challenging traditional theories.

SourceETH Zurich·JournalNature·DateNov 7, 2023

New research sheds light on early galaxy formation

A new computer simulation of the early universe aligns with JWST observations, showing no discrepancy with theoretical expectations. The 'Renaissance simulations' track dark matter clumps and galaxy formation, consistent with models that dictate cosmic physics.

SourceMaynooth University·JournalThe Open Journal of Astrophysics·TypeComputational simulation/modeling·DateOct 26, 2023

Stellar fountain of youth with turbulent formation history in the centre of our galaxy

A young star cluster, IRS13, has been found to be significantly younger than expected, with stars only 100,000 years old, despite being near the supermassive black hole Sgr A*. The cluster's turbulent history suggests it was 'captured' by the black hole's gravity, leading to a bow shock and increased star formation.

SourceUniversity of Cologne·JournalThe Astrophysical Journal·TypeObservational study·DateOct 10, 2023

Using cosmic weather to study which worlds could support life

Researchers used a new code to test the capabilities of future giant telescopes, which could help identify potentially habitable planets. The study found that ELT and TMT can make high-resolution observations of brown dwarfs and exoplanets over a single rotation, while GMT's instruments require multiple rounds.

SourceOhio State University·JournalThe Astrophysical Journal·TypeData/statistical analysis·DateJul 27, 2023

Webb Space Telescope detects universe’s most distant complex organic molecules

Researchers have detected complex organic molecules in a galaxy more than 12 billion light-years away from Earth. The study used the James Webb Space Telescope and gravitational lensing to observe the galaxy's atomic and molecular composition, revealing insights into the formation of galaxies, their lifecycle, and how they evolve.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalNature·TypeObservational study·DateJun 5, 2023

A telescope’s last view

Astronomers at MIT and University of Wisconsin have discovered two validated planets, K2-416 b and K2-417 b, in Kepler's last week of high-quality data. The third planet candidate, EPIC 246251988 b, orbits its star every 10 days and is slightly farther away from Earth than the other two.

SourceMassachusetts Institute of Technology·JournalMonthly Notices of the Royal Astronomical Society·DateMay 30, 2023

NASA's Hubble hunts for intermediate-sized black hole close to home

Astronomers using Hubble have found evidence for an intermediate-mass black hole in the globular star cluster Messier 4, weighing approximately 800 solar masses. The discovery uses precise measurements of stellar motion to rule out alternative theories and suggests a single, compact black hole at the center.

SourceNASA/Goddard Space Flight Center·JournalMonthly Notices of the Royal Astronomical Society·TypeObservational study·DateMay 23, 2023

Team led by NCKU researcher performs cosmological modeling to shed light on the nature of dark energy

A research group led by NCKU professor I-Non Chiu conducted the first cosmological study on galaxy clusters identified by eROSITA, analyzing 550 galaxy clusters. The results suggest that Dark Energy occupies up to 76% of the total energy density in the Universe.

SourceCactus Communications·JournalMonthly Notices of the Royal Astronomical Society·TypeComputational simulation/modeling·DateMay 22, 2023