Apr 2, 2015
Type Ia supernovae (SNe Ia) are critical tools for measuring the contents of our Universe, but recent studies found their cosmological brightness showed a bias with respect to the environment in which they are found: SNe Ia in massive, old, metal-rich galaxies are...
Mar 25, 2015
Despite their ongoing use as tools for cosmology, type Ia supernovae (SNe Ia) are still not fully understood physically. In the classic scenario, a white dwarf and a larger star orbit each other, with the white dwarf gradually accreting material from its companion...
Mar 17, 2015
The widespread use of type Ia supernovae (SNe Ia) in cosmology, as one of the farthest rungs in the extragalactic distance ladder and as tools to study dark energy, depends on the accuracy with which their luminosity can be measured. The classic luminosity calibration...
Mar 11, 2015
At the centre of most (if not all) galaxies lies a supermassive black hole. In in most cases, as in our own galaxy, it is is dormant. This means that it is not currently accreting matter. However, in some galaxies it is active: it is accreting matter and, as a result,...
Recent Comments