Researchers using the Atacama Large Millimeter/submillimeter Array (ALMA) successfully imaged a radio “hole” around a galaxy cluster 4.8 billion light-years away. This is the highest resolution image ever taken of such a hole caused by the Sunyaev-Zel'dovich effect (SZ effect). The image proves ALMA’s high capability to investigate the distribution and temperature of gas around galaxy clusters through the SZ effect.
Current research at MPA
Why do galaxies in enormous galaxy clusters look different from normal, isolated galaxies? To answer this question, an international research team led by MPA has created the Hydrangea simulations, a suite of 24 high-resolution cosmological hydrodynamic simulations of galaxy clusters containing over 20,000 individual galaxies. These simulations provide astrophysicists with a powerful new tool to understand how galaxies formed and evolved in one of the most extreme environments of our Universe.
Researchers from the Max Planck Institute for Astrophysics and the University of Amsterdam just published the most precise analysis so far of the fluctuations in the gamma-ray background. They used more than six years of data gathered by the Fermi Large Area Telescope and found two different source classes contributing to the gamma-ray background. No traces of a contribution of dark matter particles were found in the analysis.
Complex predictions such as election forecasts or the weather reports often have to be simplified before communication. In astronomical data analysis, researchers are also confronted with the problem of simplifying probabilities. Two researchers at the MPA now show that there is only one mathematically correct way to measure how embarrassing a simplified prediction can be. According to this, the recipient of a prediction should be deprived of the smallest possible amount of information.