Oskar Klein Centre

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Glowing gas globs each over 30 times more massive than the Earth are being expelled by WR124.

Massive Wolf-Rayet star observed exploding as a supernova

This newly discovered type of stellar explosion – coined Type Icn – is described in the latest issue of the journal Nature.

A spongy web of dark matter with supernovae as points embedded throughout.

Tracing the cosmic web with supernovae

A group of scientists, led by OKC PhD student Eleni Tsaprazi, have studied the environments in the large-scale structure where supernova explosions take place to explore whether supernovae can be used to map the high-redshift universe.

Artist’s impression: a compact stellar mass black hole orbiting a star that lives in a star cluster

Small black hole discovered outside the Milky Way

An international team of astronomers, led by Dr. Sara Saracino of Liverpool John Moores University and including Dr. Christopher Usher of the Oskar Klein Centre, have discovered a small black hole outside of the Milky Way by studying how it influences the motion of a star in its close vicinity. This is the first time this technique has been used to detect a black hole outside of our own galaxy.

Stockholm - Photo by Raphael Andres.

Nine postdoctoral positions at the Oskar Klein Centre, Stockholm

Positions involving analysis and machine learning with galaxy survey data, CMB instrumentation and data analysis, modelling and machine learning with LSST data, cosmology with Type Ia SNe, modelling transient light curves and spectra, observations of exotic SNe, and axion astrophysics and cosmology.