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Extragalactic Astronomy

Predictions of the stellar mass growth of BCGs
Image Credit: Lin et al
Predictions of the stellar mass growth of BCGs
The green triangles represent predictions of the stellar mass growth of BCGs by a highly successful galaxy formation model (Guo et al. 2011), which are found to agree fairly well with our Spitzer and WISE infrared observations for a large sample of BCGs (blue points and the pink star), down to z~0.5 or so. Below that redshift, there is some hint of different behavior between the model and data, in the sense that the model BCGs continue to grow, while the observed ones slow down their growth considerably. (Lin et al. 2013, ApJ, 771, 61)
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