Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26as...46..105t&link_type=abstract
Astronomy and Astrophysics Supplement, Vol. 46, P. 105, 1981
Astronomy and Astrophysics
Astrophysics
15
Scientific paper
Using data published by Cousins (1980) and measurements made by ourselves, colour-colour and colour-magnitude relations of red dwarfs are studied in Cousins's photometric system. The effect of TiO blanketing on the shape of the V-R, R-I two-colour diagram has been studied qualitatively. For statistical studies based on space densities of M dwarfs the colour-magnitude relations MV, MR, V-I or M , V-I are the most suitable. The dispersion in absolute magnitude which should be employed in these statistical studies is approximately ± Om.4.
Alcaino Gonzalo
Karman C.
Thé Pik-Sin
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