Cosmology

Blog about cosmology

Map of cosmic ray flux (Image courtesy Pierre Auger Collaboration)

An article published in the magazine “Science” describes a research on the distribution of cosmic rays’ arrival directions. The Pierre Auger Collaboration used data collected by the Pierre Auger Observatory, Argentina, the largest ever built to detect cosmic rays, to find evidence that high energy cosmic rays come from outside the Milky Way.

An article published in the journal “Monthly Notices of the Royal Astronomical Society” describes a research that revealed a surprise in the origin of electromagnetic radiation from the Crab Nebula that can influence the research on cosmic rays. Federico Fraschetti of the University of Arizona, USA, and Martin Pohl of the University of Potsdam, Germany, believe that the model created by Enrico Fermi in 1949 is to be partially revised because those radiation are produced in a way different from what was thought.

Dark Energy Survey's map (Image Chihway Chang/Kavli Institute for Cosmological Physics at the University of Chicago/DES Collaboration)

The Dark Energy Survey (DES) collaboration presented a map of dark matter at the American Physical Society Division of Particles and Fields at Fermilab created using gravitational lensing effects from 26 million galaxies. These results show the composition of the recent universe and are very close to the predictions based on the map created upon measurements the primeval universe of ESA’s Planck Surveyor satellite.

The 5 H.E.S.S. telescopes (Photo H.E.S.S., MPIK/Christian Foehr)

An article published in the journal “Physical Review Letters” describes a new interpretation of observations made with NASA’s Fermi Gamma-ray Space Telescope and the High Energy Stereoscopic System (H.E.S.S.) observatory in Namibia. According to a team of Italian researchers led by Daniele Gaggero of the University of Amsterdam, at the center of the Milky Way there’s a kind of trap that focuses there some of the highest energy cosmic rays, the fastest particle of the galaxy.

Remnant of Supernova 1987A seen by ALMA (Image ALMA (ESO/NAOJ/NRAO); R. Indebetouw; NASA/ESA Hubble)

Two articles, one published in the journal “Monthly Notices of the Royal Astronomical Society” and one in the “Astrophysical Journal Letters”, describe different aspects of a research on the supernova 1987A (SN 1987A). Several researchers used the ALMA radio telescope discovering for the first time a series of molecules in the supernova remnants. This allowed to create a 3D map of what was called a dust factory and to find clues even about star birth.