"Revolutionary Technique Enhances Galaxy Mass Measurement with Gravitational Lensing and Quasars"

Researchers at EPFL have developed a new method utilizing gravitational lensing to measure the mass of galaxies hosting quasars with three times greater precision than previous techniques. By analyzing the gravitational lensing rings of a quasar's host galaxy, scientists can estimate its mass, providing valuable insights into early universe galaxy evolution and black hole formation. This breakthrough allows for more accurate models of galaxy formation and growth. The researchers expect to detect hundreds of these lensing quasars with the upcoming ESA-NASA mission Euclid.