Browsing by Subject "colour"

Now showing 1 - 2 of 2
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    Open Access
    Red socks and purple rain: the political uses of colour in late apartheid South Africa
    (SAGE, 2011) Archer, Arlene; Stent, Stacey
    This article explores the extent to which colour functions as an independent mode in a particular context and explores the culturally produced regularities in the uses of colour in this context. Drawing on a Hallidayan metafunctional view of text, we look at how colour instantiated systems of knowledge and belief (ideational function) and social relations and identities (interpersonal function) in South Africa during the last decade of the apartheid government. In this type of repressive socio-political context, colour was a less policed mode, and thus had different affordances to images and the verbal modes. We argue that colour can function as an independent mode under certain conditions, such as stringent press restrictions, where the use of colour in a range of media (clothing, flags, posters) can play a crucial role in communicating.
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    Open Access
    The void galaxy survey: photometry, structure and identity of void galaxies
    (2017) Beygu, B; Peletier, R F; Hulst, J M van der; Jarrett, T H; Kreckel, K; Weygaert, R van de; van Gorkom, J H; Aragon-Calvo, M A
    We analyse photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6 μm and 4.5 μm Spitzer photometry. The VGS galaxies constitute a sample of void galaxies that were selected by a geometric-topological procedure from the Sloan Digital Sky Survey Data Release 7 data release, and which populate the deep interior of voids. Our void galaxies span a range of absolute B-magnitude from MB = -15.5 to -20, while at the 3.6 μm band their magnitudes range from M3.6 = -18 to -24. Their B-[3.6] colour and structural parameters indicate these are star-forming galaxies. A good reflection of the old stellar population, the near-infrared band photometry also provide a robust estimate of the stellar mass, which for the VGS galaxies we confirm to be smaller than 3 × 1010 M⊙. In terms of the structural parameters and morphology, our findings align with other studies in that our VGS galaxy sample consists mostly of small late-type galaxies. Most of them are similar to Sd-Sm galaxies, although a few are irregularly shaped galaxies. The sample even includes two early-type galaxies, one of which is an AGN. Their Sérsic indices are nearly all smaller than n = 2 in both bands and they also have small half-light radii. In all, we conclude that the principal impact of the void environment on the galaxies populating them mostly concerns their low stellar mass and small size.