Weather in Bologna

Bologna
June 19, 2018, 8:35 am
Sunny
Sunny
20°C
real feel: 20°C
current pressure: 1020 mb
humidity: 72%
wind speed: 3 m/s SSW
sunrise: 5:30 am
sunset: 9:03 pm
 

The nature of dark matter unveiled by cosmic collisions: the bullet group

XMM_Bullet_Group_625

Dark matter (DM) is one of the pillars of our cosmological understanding yet its nature is still elusive. It makes up about 85% of the Universe’ matter but its presence has been revealed only through gravity. The most interesting probes of its presence and nature is the merger of two clusters (or groups) of galaxies.

…→ Read More: The nature of dark matter unveiled by cosmic collisions: the bullet group

ALMA reveals an extremely compact starburst around a hidden black hole in the early Universe.

ALMA image

Most massive galaxies in the Universe host a giant black hole (BH) at their center, with mass ranging from one-million to one-billion solar masses. The formation of stars in a galaxy and the growth of its central supermassive BH are often thought to be correlated processes, which is conventionally referred to as galaxy-BH co-evolution. Active

…→ Read More: ALMA reveals an extremely compact starburst around a hidden black hole in the early Universe.