Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99...98k&link_type=abstract
Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 3, p.98
Other
Scientific paper
In order to display graphically the visual colours of stars and other astronomical objects, photometric broadband R, V, B colours are used to proxy for the r, g, b colours of the three visual sensors of the eye. From photometric Johnson B-V and V-R colour indices, R, V, and B magnitudes (V = 0) are calculated, and from these the respective brightnesses (r, v = 1 = g, and b) are calculated. After suitable normalization these are then placed in a ternary diagram having r, g, and b as the vertices. All B-V and V-R are adjusted so that the Sun falls in the same place as a blackbody at 5800 K. The resulting ternary plot shows all of its objects (stars, planets) in their visual colours at their relative positions in the ternary diagram. The star colours displayed on a computer monitor screen or as a print with a colour printer are more vivid than the usual visual impressions of isolated stars, undoubtedly because of properties of the dark-adapted eye, but double-star pairs with contrasting colours correspond nicely to telescopic visual impressions.
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