All posts by Garrelt Mellema
LOFAR starts Cycle 0 observing
The end for supermassive population III stars?
Are the first stars really very massive? Some 10 years ago, the idea that the first, metal-free stars would be very massive, became popular. Simple theoretical arguments about radiative cooling and complex numerical simulations both seemed to point to the formation of metal-free stars of masses of several 100s solar masses. Because of their zero metallicity they were dubbed Pop III stars. Early simulations of their formation are commonly associated with Tom Abel and Volker Bromm.
Spring time for LOFAR Sweden
As the Sun is finally warming up both the nature and people this far north, also the efforts to construct the Swedish LOFAR station awake from their winter sleep. From November until now snow and frozen soil stopped the work in its tracks, but today at Onsala near Göteborg on the west coast of Sweden, the building activities will recommence.
LOFAR is a European wide radio telescope consisting of stations spread out over the Netherlands, Germany, the UK, France and Sweden, with possibly more countries joining in the future.