Krishna Naidoo – Cosmologist
Krishna Naidoo is a PhD student at UCL studying observational cosmology. Krishna has spent a large portion of his PhD developing a new method to analyse galaxy surveys. These surveys map out large parts of the universe using distant galaxies to try and trace how matter is distributed. Cosmologists often use galaxies to try and measure how clumpy the universe is, however the conventional methods do not take into account how galaxies are distributed in respect to each other. Krishna’s new method involves constructing a minimum spanning tree using galaxies as nodes. The minimum spanning tree is a fully connected graph which has no loops and has the minimum possible total length. In making the decisions to construct this graph we hope to gather additional information contained in galaxy data to better understand the underlining physical mechanisms at play.