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Oskar Klein Centre

How Astronomers Use Ginormous Natural Lenses to Study Distant Space Explosions

OKC postdoctoral researcher Suhail Dhawan explains lensed supernovae and how they will be used to study gravity, the expansion of the universe, and some of the brightest explosions we know.

Light is bent by massive objects in our Universe

An image of the sky in gamma rays. Gamma ray burst locations on the sky are marked.

NASA’s Fermi Mission Reveals its Highest-energy Gamma-ray Bursts

Gamma-ray bursts are the most powerful explosions known in the Universe, yet we still don’t understand the physics behind their high-energy radiation. An international team, partly led by OKC researcher Magnus Axelsson, has studied nearly 200 events observed over 10 years, the largest sample collected at these energies thus far. The study reveals many new observational findings, it also tells us that there is still a lot we don’t know.

The details of the new gamma ray burst catalog

Our Milky Way galaxy with known halo streams of stars shown above and below.

GD-1 Stellar Stream and Dark Matter in Our Milky Way

Streams of stars orbiting in the halo of our Milky Way Galaxy can be used to constrain the shape of our Galaxy's dark matter halo and the amount of mass inside the radius of our Sun's orbit.

Measuring the Milky Way dark matter halo mass and shape