Long-term magnetic activity of a sample of M-dwarf stars from the HARPS program - I. Comparison of activity indices

J. Gomes da Silva; N. C. Santos; X. Bonfils; X. Delfosse; T. Forveille; S. Udry

doi:10.1051/0004-6361/201116971

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Volume 534 (October 2011)

A&A, 534 (2011) A30

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Table 4

Pearson correlation coefficients between the activity indices.


Star	N_bins(S)	N_bins	S_Ca II vs. Hα		S_Ca II vs. Na i		S_Ca II vs. He i		Hα vs. Na i		Hα vs. He i		Na i vs. He i
			ρ	FAP	ρ	FAP	ρ	FAP	ρ	FAP	ρ	FAP	ρ	FAP

GJ361	4	4	0.58	0.27	0.73	0.12	0.43	0.35	–0.07	0.46	0.86	0.13	–0.24	0.41
GJ2049	<4	4							–0.04	0.47	–0.89	0.083	0.43	0.33
GJ3218	<4	4							1.00	0.0006	0.39	0.36	0.36	0.37
Gl1	5	5	0.12	0.41	0.89	0.031	0.56	0.24	0.37	0.33	0.14	0.45	0.84	0.067
Gl176	6	7	0.85	0.016	0.33	0.27	0.76	0.033	0.40	0.24	0.77	0.034	–0.04	0.48
Gl205	6	6	0.98	0.0015	0.94	0.0079	0.58	0.17	0.83	0.054	0.57	0.17	0.69	0.10
Gl273	5	6	0.06	0.46	0.90	0.024	0.45	0.25	–0.40	0.24	0.80	0.038	0.08	0.44
Gl382	5	5	0.99	0.0007	0.98	0.0017	0.42	0.24	0.98	0.0021	0.46	0.23	0.56	0.15
Gl393	<4	4							–0.10	0.45	0.91	0.044	0.17	0.42
Gl433	5	6	–0.28	0.32	0.98	0.0012	–0.50	0.29	–0.32	0.25	–0.39	0.30	–0.31	0.33
Gl436	6	7	–0.06	0.45	0.87	0.010	0.42	0.20	0.49	0.19	–0.15	0.38	0.21	0.32
Gl479	4	4	0.99	0.0044	0.94	0.034	0.87	0.060	0.94	0.033	0.82	0.10	0.91	0.050
Gl526	4	4	–0.78	0.13	0.99	0.013	0.21	0.36	–0.86	0.12	0.42	0.24	0.10	0.43
Gl551	<4	7							0.59	0.086	0.96	0.0007	0.55	0.11
Gl581	9	10	–0.44	0.094	0.82	0.0036	0.75	0.024	–0.75	0.0035	–0.14	0.37	0.58	0.063
Gl588	4	4	0.73	0.11	0.94	0.026	0.88	0.067	0.63	0.17	0.93	0.036	0.73	0.15
Gl667C	8	7	–0.31	0.23	0.89	0.0016	–0.04	0.40	0.11	0.40	0.35	0.23	–0.15	0.34
Gl674	4	5	0.35	0.36	0.91	0.045	0.60	0.23	0.59	0.18	0.81	0.036	0.85	0.028
Gl680	4	4	0.96	0.022	0.85	0.085	0.89	0.087	0.95	0.021	0.13	0.39	–0.04	0.50
Gl699	4	4	0.57	0.21	0.43	0.32	0.25	0.38	0.32	0.35	0.89	0.062	0.48	0.27
Gl832	6	5	0.64	0.083	0.97	0.0006	0.05	0.47	–0.17	0.37	0.49	0.15	–0.02	0.49
Gl849	6	6	0.80	0.063	0.71	0.069	0.44	0.24	0.71	0.077	0.82	0.041	0.84	0.025
Gl876	4	4	0.76	0.14	1.00	0.0005	0.58	0.24	0.88	0.054	0.88	0.053	0.93	0.032
Gl877	<4	5							0.90	0.032	0.57	0.20	0.79	0.088
Gl887	4	4	0.85	0.12	0.91	0.063	0.63	0.21	0.98	0.018	0.82	0.10	0.86	0.082
Gl908	6	8	–0.24	0.33	0.89	0.016	0.31	0.30	0.12	0.39	–0.16	0.37	0.07	0.44
HIP12961	6	6	0.35	0.25	0.30	0.32	0.63	0.098	–0.38	0.23	0.83	0.018	–0.78	0.033
HIP19394	<4	6							0.39	0.21	0.08	0.45	0.26	0.31
HIP38594	<4	4							0.59	0.19	0.19	0.41	–0.15	0.43
HIP85647	5	5	0.94	0.011	0.99	0.0016	0.94	0.012	0.92	0.019	0.88	0.037	0.77	0.087

Notes. FAPs calculated using bootstrap permutations (see text). In bold are given FAP values below 0.05. N_bins is the number of bins for each star.

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