Double Bubble Galaxy
M31 discovered to be blowing vast bubbles of gamma rays, just like our own galaxy.
The ‘Ultimate’ X-ray Sky Survey: Finding Active Galaxies in Superclusters
The XXL Survey is here as the rightful successor to the XMM-Newton survey that gave us a unique and extravagant look into the high-energy universe. Here, we look at some of the observations that the XXL has to offer!
UV Diagnosis: AGNs or Star-Forming Galaxies?
Active galactic nuclei (AGN) and star-formation processes ionize gases around galaxies and the Universe. How can we separate the two to pin down the dominant ionizing sources in the early Universe?
We’ll be counting galaxies…
Counting the number of galaxies at a given mass in a region of space gives you the number density – something that can be really easily compared to simulations. But do our observations and theory match up? And how does looking out to higher and higher redshifts help us to better understand our Universe…
The Brightest Hot DOG in the Universe
What makes up the innards of the brightest galaxy in the universe?
Looking at Celestial Hot DOGs in the Microwave
These hot galaxies show signs of AGN and starburst activity occurring within their dusty interiors.