Jul 28, 2015
In 2014, the measurements of the clustering properties from large-scale structures at high redshift by the Baryon Oscillation Spectroscopic Survey (BOSS) solidified our current understanding of the accelerated expansion of the Universe. The wealth and quality of BOSS...
Jul 23, 2015
Despite dark matter dominating the Universe with 84% of the mass compared to 16% of baryonic matter, it is non-interacting and cannot be measured directly. There are techniques to measure the fraction of the two types of matter but weak gravitational lensing is the...
Jul 21, 2015
The Cold Dark Matter (CDM) model has proven very successful, however there exists a long standing problem of ubiquitous ‘cusps’ of dark matter halos, i.e. the dark matter distribution sharply increases to a high value at a central point. Significant...
Jul 17, 2015
CAASTRO PhD student Joe Callingham (University of Sydney) has re-examined a ‘boring’ radio source and shown it could hold the key to a long-standing problem in astronomy: why there seem to be more ‘baby’ radio galaxies than mature ‘giant’ ones. The source is called...
Jul 13, 2015
Previous surveys have shown that early-type galaxies (ETGs), traditionally thought of as dispersion-dominated systems, show strong rotation in ~80% of cases. This led to a new kinematic classification of ETGs into fast rotators (strong rotation signature; FRs) and...
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