Galaxy Cluster
The largest gravitationally bound structures in the universe, containing hundreds to thousands of galaxies, hot intracluster medium and dark matter. They serve as cosmological probes.
Timeline (last 90 days)
Megan Donahue focuses on the study of galaxy clusters, using X-ray observations and optical data to analyze the formation and evolution of galaxy clusters.
Galaxy clusters are among the largest gravitationally bound structures in the universe, with typical masses between 10^14 and 10^15 solar masses, containing hundreds to thousands of galaxies.
The hot gas within galaxy clusters emits in the X-ray band through bremsstrahlung radiation.
Galaxy clusters are often used as cosmological probes, and the evolution of their number with redshift is highly sensitive to the nature of dark energy and the expansion history of the universe.
The velocity dispersion of galaxies in galaxy clusters can reach about 1000 km/s, requiring dark matter to provide additional gravity to maintain the binding.
All Facts (5)
Megan Donahue focuses on the study of galaxy clusters, using X-ray observations and optical data to analyze the formation and evolution of galaxy clusters.
50%UnverifiedGalaxy clusters are among the largest gravitationally bound structures in the universe, with typical masses between 10^14 and 10^15 solar masses, containing hundreds to thousands of galaxies.
50%UnverifiedThe hot gas within galaxy clusters emits in the X-ray band through bremsstrahlung radiation.
50%UnverifiedGalaxy clusters are often used as cosmological probes, and the evolution of their number with redshift is highly sensitive to the nature of dark energy and the expansion history of the universe.
50%UnverifiedThe velocity dispersion of galaxies in galaxy clusters can reach about 1000 km/s, requiring dark matter to provide additional gravity to maintain the binding.
50%