Dark Matter

In a new study of axion motion, researchers propose a scenario known as “kinetic misalignment” that greatly strengthens the case for axion/dark matter equivalence. The novel concept answers key questions related to the origins of dark matter and provides new avenues for ongoing detection efforts...
Occupying a region of space (L2) four times more distant than the moon, the SRG observatory is busily rendering an X-ray map of the universe and has officially reached the half-way mark of its first all-sky survey, which began in December and is...
A pioneering mission that traces its roots back to the Soviet Union achieved liftoff on July 13, 2019. Rashid Sunyaev , Maureen and John Hendricks Distinguished Visiting Professor in the School of Natural Sciences, helped conceive of the venture more than 15 years ago...
Rashid Sunyaev , Maureen and John Hendricks Distinguished Visiting Professor in the School of Natural Sciences, is the Russian Scientific Head of the Spectrum-Roentgen-Gamma (SRG) mission, which promises a trove of data for researchers to probe the largest structures of the universe and perhaps...
Melissa Pandika of OZY profiles theoretical physicist Tracy Slatyer , former Member in the School of Natural Sciences, whose work, Pandika writes, "could bring physicists closer to detecting dark matter signals by better enabling them to tease these signals apart from similar ones produced...
Everything that humans have seen up until now exists in the 4.9 per cent of the universe that interacts with light. The rest is hidden from view. Most of it, physicists believe—68.3 per cent—is dark energy, an enigmatic force that drives...
Dark matter is as tangible as stars and planets to most astronomers. We routinely map it out. We conceive of galaxies as lumps of dark matter with dabs of luminous material. We understand the formation of cosmic structure, as well as the evolution of the...
Could dark matter consist of primordial black holes, as numerous as the stars? It’s an old, improbable idea, but it made a Lazarus-like comeback a year ago, when the discovery of gravitational waves suggested that the cosmos abounds with unexpectedly heavy black holes. With decades-long...
For 80 years, scientists have puzzled over the way galaxies and other cosmic structures appear to gravitate toward something they cannot see. This hypothetical “dark matter” seems to outweigh all visible matter by a startling ratio of five to one, suggesting that we barely know...
Tracy Slatyer, physicist and Member (2010-13) in the School of Natural Sciences, is searching for faint wisps of dark matter annihilating in the early universe—and perhaps in hiding places closer to home.
A recently discovered ultra-faint dwarf galaxy is sending astronomers clues about the makeup of dark matter in the neighborhood of the Milky Way. It is one more clue that a type of stellar object called massive compact halo objects (MACHOs) are probably not the dominant...