ZAMS fitting

Brief description

How well do theoretical models of zero age main sequence stars fit the available data? In this experiment students write a computer code to construct colour-magnitude diagrams for a number of nearby open clusters, determine the so-called 'ridge line' of the zero age main sequence, and compare this observationally-determined ZAMS with theoretical model predictions. This comparison allows the distance of the open cluster to be measured; distance estimates can then be compared with the results obtained (using the parallax method) by the HIPPARCOS satellite.