Articles tagged with Weak Gravitational Lensing
A team of astronomers used JWST to detect the motion of stars near a galaxy's center affected by a dormant black hole's gravity. The findings suggest that densest galaxies were sites of rapid black hole growth early in cosmic history.
Astrophysicists from UChicago analyzed galaxy shapes and distances to independently examine inconsistencies in the LCDM model. The team's findings support previous weak lensing measurements, indicating consistent growth of structure in the universe.
Researchers propose a new methodology to test the Universe's isotropy using Euclid space telescope data, aiming to detect potential anisotropies that challenge the Standard Model of Cosmology. If confirmed, these findings would open a new chapter in cosmology, potentially revising our understanding of the Universe's behavior.
The Princeton-led team measured the dark matter's 'clumpiness,' finding a value of 0.776 that conflicts with the Cosmic Microwave Background's value of 0.83. The discrepancy suggests the standard model might be incomplete or has an error, prompting further investigation.
Scientists have created a synthetic survey that showcases what can be expected from the Roman Space Telescope’s future observations. The simulation contains 33 million galaxies and 200,000 foreground stars, helping scientists plan observing strategies and test data analysis methods.
Rachel Mandelbaum, a Carnegie Mellon professor, was awarded the Simons Investigator program to study cosmic distortions and dark matter. She develops algorithms to analyze galaxy relations with dark matter halos.
Research uses galaxy distribution and weak lensing to map cosmic web, finding that star-forming galaxies play a more prominent role in the distant universe. The study provides new insights into galaxy evolution and the structure of the cosmos.
A new study extends gravitational lensing to smaller, older structures, improving understanding of dark matter distribution. Researchers use x-ray emissions to pinpoint galaxy cluster centers and measure total masses.
SNAP, a NASA-supported mission, aims to measure the expansion history of the universe and investigate dark energy. Using two independent techniques, it will analyze thousands of Type Ia supernovae and independently probe the growth structure of the universe.