Summary: A&A manuscript no.
(will be inserted by hand later)
Your thesaurus codes are:
08(08.01.2; 08.06.3; 08.12.1)
ASTRONOMY
AND
ASTROPHYSICS
30.7.1996
Effect of chromospheric activity on the mean colours of
late­type stars
P.J. Amado and P.B. Byrne
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
Received; accepted
Abstract. In this paper we show, for the first time, the
effect of activity on the (U --B) 0 vs. (B--V ) 0 colour­colour
diagram for a large sample of late type stars. We clearly see
that for single­lined spectroscopic RSCVn systems there
exists an ultraviolet excess over that recorded for quies­
cent stars of the same spectral type. The same effect is seen
in main­sequence stars but to a lesser extent. From simple

Source: Armagh Observatory

Collections: Physics