KIPAC Blog

The question of whether we receive microwave radiation from spinning dust grains in our Galaxy has been debated for 15 years. A collaboration including a KIPAC scientist has provided valuable data indicating that the answer is probably yes. The ARCADE 2 instrument being launched on a high altitude balloon. Getting above the atmosphere is important in an absolute... Read More
A KIPAC astrophysicist has published some of the first constraints on dark energy and other cosmological parameters using the measured signal from "shadows" of galaxy clusters in the CMB. The Atacama Cosmology Telescope (ACT), located in the Atacama desert in Chile. Multiple probes of the Universe’s expansion rate suggest a concordant model where dark matter and... Read More
For the first time, thanks to the Fermi Space Telescope, high energy gamma rays gave been detected coming from another spiral galaxy much like our own Milky Way. It is now evident that the differences in gamma-ray luminosity among galaxies show that the density of cosmic rays varies and is correlated with the formation of new stars. The intensity of gamma-rays... Read More
By most accounts, the Milky Way is a fairly unexceptional galaxy in the Universe at large. However, a team of KIPAC scientists has shown that it has one very unusual feature: its two lesser companions, the Magellanic Clouds. Images of systems from the SDSS spectroscopic catalog where Milky Way-like hosts have two Magellenic Cloud-like companions Readily visible... Read More
The Fermi Gamma-Ray Space Telescope has seen giant unexpected gamma-ray structures in the center of our Milky Way galaxy. The structures, which protrude above and below the Galactic plane in the center of the Galaxy like two opposing bubbles being blown up, are approximately 50,000 light-years tall. An all-sky map of gamma-ray emission as seen by the Fermi LAT,... Read More
The Crab Nebula is a system with a pulsar and a surrounding ball of material that emits light all across the electromagnetic spectrum. For many years it was thought to be a constant steady source and was used as a calibration reference for telescopes. Now, KIPAC scientists using the Fermi Space telescope have shown that the emission from the Crab in gamma rays varies... Read More
Galaxy clusters are a well known source of X-rays. KIPAC researchers have shown that at least one cluster, the famous 'Bullet' Cluster, has an extra component of X-ray emission detectable beyond the dominant one seen ubiquitously elsewhere. The measured X-ray spectrum of the Bullet Cluster as determined by Ajello and collaborators, along with the best fit spectrum... Read More
The extent to which the cool, dense gas at the centers of massive galaxy clusters can be disrupted remains an outstanding question in astrophysics. Although physical processes such as mergers and central galaxy activity have been shown to suppress cooling and therefore star formation in the central gas, the cool core has almost always been observed to remain more or... Read More
Core-collapse supernovae are some of the biggest explosions in the universe - but exactly how the immense amount of energy released is converted into a form we can observe has puzzled astrophysicists for many decades. The Computational Astrophysics Consortium, which includes KIPAC, studies these systems via state-of-the-art hydrodynamic (HD) and magneto-hydrodynamic... Read More
By Andrea Albert   In the hunt for dark matter, any information to help us narrow in on what to look for is key.  Miguel Sánchez-Conde (KIPAC and Stockholm University) and Francisco Prada (IFT/UAM, Madrid) have just published a crucial clue, concerning the concentration of dark matter halos, which are self-gravitating accumulations of dark matter that host systems... Read More

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