Étoiles RS CVn et binaires à chromosphère active
RS CVn are class of detached binary typically composed of a chromospherically
active G or K stars. The system generally rotate fast with typical orbital
period from a few days to 20 days. Tidal forces between the close components
have locked their rotational periods to the orbital period. The RS CVn
binaries display a high level of activity with strong chromospheric line
emissions. One of the striking aspects of these systems is their propensity
to flare. These stars shows rotational modulation of photospheric spots.and
are also magnetically active (Doppler Imaging and Zeeman Doppler Imaging
are classical technique used for map stellar surfaces of the RS CVn
components).
We have added spectroscopic binary systems with at least one component shows Ca II IH and K emission (from Strassmeier, A&AS, 100, 173-225 (1993)).
HD Star R.A. Dec. Spec. V Period (d) H&K Ha Type
28 33 Psc 00 h 05.3 -05°
42 K0III 4.61 72.93 weak absorption RS
CVn
352 5 Cet 00 h 08.2 -02° 27 K1III 6.07 96.439
strong - Beta Lyr
3196 13 Cet A 00 h 35.3 -03° 35 F7V+G4V 5.20 2.08200
moderate absorption RS CVn
4502 Zeta And 00 h 47.3 24° 16 K1III 4.06 17.7692
strong absorption Beta Lyr
13480 6 Tri 02 h 12.4 30° 18 F5+K0III 4.94 14.7339
moderate absorption RS CVn
17433 VY Ari 02 h 48.7 31° 07 K3V 6.92 13.178
strong filled RS CVn
21242 UX Ari 03 h 26.6 28° 43 K0IV+G5V 6.38 6.43791
weak/strong emission RS CVn
22468 HR1099 03 h 36.8 00° 35 K1IV+G5V 5.64
2.83774 strong emission RS CVn
29317 3 Cam 04 h 39.9 53° 05 K0III 5.05
121 weak - Cepheid
34029 Alpha Aur 05 h 16.7 46° 00 G1III+K0III 0.08 104.0214
yes absorption RS CVn
37171 HR1908 05 h 37.1 11° 02 K4III 5.94 -
moderate weak -
39743 HR2054 05 h 57.1 49° 02 G8III 6.47 83.19
yes - -
45088 OU Gem 06 h 26.2 18° 45 K3V+K5V 6.79 6.991868
strong emission DY Dra
62044 Sigma Gem 07 h 43.3 28° 53 K1III 4.14 19.60447
strong filled RS CVn
65626 54 Cam 08 h 02.6 57° 16 F9IV+G5IV 6.50 11.06803
moderate moderate RS CVn
98230 Xi UMa 11 h 18.2 31° 32 G5V 4.87 3.9805
strong absorption -
102509 93 Leo 11 h 48.0 20° 13 A6V+G5IV 4.50
71.6900 weak moderate abs. RS CVn
106677 HR4665 12 h 15.7 72° 33 K1III+K1III 6.14
64.44 strong absorption RS CVn
118216 HR5110 13 h 34.8 37° 11 F2IV+K2IV 4.93
2.61321 yes filled RS CVn
131511 HR5553 14 h 53.4 19° 09 K2V 5.97
125.369 moderate moderate -
146361 Sigma2 CrB 16 h 14.7 33° 52 F6V+G0V 5.70
1.13979 strong filled RS CVn
153751 Epsilon UMi 16 h 46.0 82° 02 F0V+G5III 4.23
39.4809 moderate absorption RS CVn
157482 HR6469 17 h 21.7 39° 58 F2V+G5IV 5.51
2018 strong filled Algol
160538 29 Dra 17 h 32.7 74° 14 K0III 6.55
905.9 strong filled RS CVn
161832 HR6626 17 h 46.0 39° 19 K3III 6.68
99.557 weak - RS CVn
184398 HR7428 19 h 31.2 55° 44 K2III 6.32 108.854
strong emission RS CVn
188088 HR7578 19 h 54.3 -23° 56 K2V+K2V 6.16 46.817
strong - BY Dra
203454 HR8170 21 h 21.0 40° 20 K8V+K5V 6.40 3.24335
yes - -
206301 42 Cap 21 h 41.5 -14° 03 G2IV 5.17 13.1740
yes absorption RS CVn
209813 HK Lac 22 h 04.9 47° 14 F1V+K0III 6.52 24.4284
yes emission RS CVn
210334 AR Lac 22 h 08.7 45° 45 G2IV+K0IV 6.09 1.98322
strong emission RS CVn
213389 V350 Lac 22 h 30.2 49° 21 K2III 6.38
17.755 moderate absorption RS CVn
216489 IM Peg 22 h 53.0 16° 50 K2II 5.60
24.65 weak filled RS CVn
222107 Lambda And 23 h 37.6 46° 27 G8IV 3.70 20.5212
yes filled RS CVn
224085 II Peg 23 h 55.1 28° 38 K2V 7.20 6.72418
strong emission RS CVn