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Home All issues Volume 495 / No 1 (February III 2009) A&A, 495 1 (2009) 287-295 Full HTML
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Table 2:

Long and short term variability records of the RS CVn-type stars most observed by IUE.
Star HD Sp. type mV B-V $P_{\rm rot}$a ib Meanc Long scaled Short scalee Year
name   & class     (days) (deg) activity variability variability  
              $\langle S\rangle$ ($\sim$decades) ($\sim$months)  
                $S_{\rm min}$/ $S_{\rm max}$ $S_{\rm min}$/ $S_{\rm max}$  
V711 Tau 22468 K1IV+G5V 5.82 0.85 2.837 $^\textrm{\scriptsize {(i)}}$ 33 $^\textrm{\scriptsize {(1)}}$ 1.864 1.651/2.090 1.700/2.396 1981
                1.798/2.237 1982
                  1.771/2.617 1984
                  1.286/3.295 1986
                  1.431/2.814 1989
                  1.702/2.173 1990
                  1.558/1.851 1991
                  0.794/2.785 1992
                  1.668/2.908 1993
                  1.406/2.751 1994
UX Ari 21242 K0IV+G5V 6.47 0.90 6.483 $^\textrm{\scriptsize {(ii)}}$ 59 $^\textrm{\scriptsize {(1)}}$ 1.277 1.115/1.480 1.132/1.501 1978
                  0.994/5.056 1979
                  1.284/1.709 1985
                  1.026/1.626 1987
                  1.018/1.386 1988
                  1.061/1.645 1990
                  1.010/1.666 1991
                  1.140/1.753 1994
                  1.033/1.211 1996
II Peg 224085 K2IV 7.51 1.01 6.724 $^\textrm{\scriptsize {(ii)}}$ 60 $^\textrm{\scriptsize {(2)}}$ 1.694 1.033/1.938 0.767/3.205 1979
                  0.477/3.775 1980
                  1.323/2.390 1981
                  1.227/3.545 1983
                  1.627/1.821 1984
                  1.817/2.005 1985
                  1.379/1.973 1986
                  1.641/2.483 1989
                  1.389/2.434 1990
                  1.497/3.280 1992
                  1.600/2.226 1993
a References for the stellar rotation period $P_{\rm rot}$: (i) Fekel (1983), (ii) Duemmler & Aarum (2001); b references for the inclination angle of the system: (1) Strassmeier et al. (1993), (2) Berdyugina et al. (1998); c mean annual Mount Wilson index for the period 1978-1996; d Maximum and minimum level of activity reached along decades; e variations recorded in particular years.

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