The new work reveals dark matter haloes as active regions of the sky, teeming with not only galaxies, but also radiation-emitting collisions that could make it possible to find dark matter haloes in the real sky. Source: https://earthsky.org/space/supercomputer-study-zoom-in-dark-matter-haloes…
Tag: gravitational lensing
New Hubble Observations Suggest Gap in Current Dark Matter Models
Long-time Slashdot reader bsharma shares an announcement from NASA’s Hubble Space Telescope site:
Researchers found that small-scale concentrations of dark matter in clusters produce gravitational lensing effects that are 10 times stronger than expected. This evidence is based on unprecedently detailed observations of several massive galaxy clusters by NASA’s Hubble Space Telescope and the European Southern Observatory’s Very Large Telescope (VLT) in…
Are there more rogue planets than stars in our galaxy?
A new study suggests there are more rogue, free-floating planets – unconnected to any star – than stars in our Milky Way galaxy. NASA’s upcoming Nancy Grace Roman Space Telescope is expected to begin finding hundreds of them. Source: https://earthsky.org/space/rogue-planets-milky-way-roman-space-telescope…
Astronomers spy a Milky Way look-alike 12 billion light-years away
This distant galaxy – SPT0418-47 – surprised astronomers by being organized enough to have a spinning disk and a galactic bulge, early in the history of our universe. Source: https://earthsky.org/space/alma-distant-milky-way-lookalike-galaxy-spt0418-47…
Two invisible stars are bending space-time deep in the Milky Way
Astronomers uncovered a pair of invisible stars creating ripples in space-time, a phenomenon known as gravitational lensing. Source: https://www.livescience.com/invisible-stars-gravitational-lensing.html
Data from antipodal places: First use of CMB polarization to detect gravitational lensing from galaxy clusters
Galaxies. Amalgamations of stars, interstellar gas, dust, stellar debris and dark matter. They waltz through the cold universe, gravity nurturing their embrace. Occasionally, galaxies snowball into enormous galaxy clusters with masses averaging 100 trillion times that of our sun. Source: https://phys.org/news/2020-01-antipodal-cmb-polarization-gravitational-lensing.html…