Characterisation of magnetic activity of M dwarfs - Possible impact on surface brightness

Open Access

Table 2

Synthesis of the characterisation and long-term activity analysis developed in this work.

Star	# Spectra	Time span (d)	⟨S⟩	σ_S/⟨S⟩	log $R_{H K}^{'}$ $$\[R_{H K}^{\prime}$\$	σ_log $R_{H K}^{'}$ $$\[R_{H K}^{\prime}$\$	P_cyc (d)	FAP (%) IB 19 \| Bootstrap
GJ 1	68	5238	0.399	0.140	−5.537	0.145	4286 ± 479	0.01 \| 0.04
GJ 15 A	13	15	0.427	0.046	−5.513	0.041	−	−
GJ 79	22	6589	1.703	0.064	−4.497	0.032	−	−
GJ 169	3	9	1.287	0.036	−4.524	0.018	−	−
GJ 176	112	4813	1.477	0.137	−4.823	0.070	−	−
GJ 205	102	7675	1.801	0.175	−4.614	0.088	5313 ± 862	<0.1 \| <0.01
GJ 229 A	86	7698	1.487	0.130	−4.665	0.066	4949 ± 423	<0.1 \| <0.01
GJ 273	172	4490	0.752	0.094	−5.491	0.063	−	−
GJ 338 B	7	2958	1.765	0.077	−4.393	0.037	−	−
GJ 393	154	5121	0.939	0.081	−5.066	0.045	1124 ± 29	0.003 \| 0.02
GJ 406	33	3733	155.893	0.902	−3.986	0.402	−	−
GJ 411	1	−	0.397	−	−5.615	−	−	−
GJ 412 A	12	1742	0.350	0.115	−5.675	0.121	−	−
GJ 447	65	4331	1.211	0.190	−5.406	0.107	1956 ± 98 ^IB	0.0002
GJ 488	67	5232	1.603	0.097	−4.480	0.048	−	−
GJ 526	47	6232	0.736	0.090	−5.106	0.056	3739 ± 288	0.013 \| 0.08
GJ 536	216	5842	1.120	0.116	−4.840	0.061	1643 ± 58	0.008 \| 0.06
							4044 ± 443	0.05 \| 0.1
GJ 551	140	5495	11.994	0.399	−4.807	0.160	4121 ± 321	0.02 \| 0.05
GJ 570 B	129	1859	1.394	0.099	−4.821	0.049	−	−
GJ 581	30	1883	0.537	0.106	−5.606	0.082	−	−
GJ 628	154	4998	0.715	0.139	−5.518	0.094	4498 ± 607	0.004 \| 0.01
GJ 674	74	5470	1.585	0.165	−4.869	0.082	−	−
GJ 687	98	4	0.558	0.030	−5.519	0.023	−	−
GJ 699	72	5834	0.695	0.319	−5.533	0.185	3281 ± 255	0.001 \| 0.02
GJ 725 A	21	3	0.454	0.088	−5.642	0.076	−	−
GJ 725 B	50	612	0.752	0.643	−5.387	0.277	−	−
GJ 729	103	7603	7.418	0.274	−4.335	0.116	1521 ± 20 ^IB2	<0.1
GJ 752 A	305	5892	1.004	0.124	−5.070	0.069	4416 ± 462	<0.01 \| 0.02
GJ 809	61	5152	1.545	0.148	−4.647	0.076	2898 ± 273	0.001 \| 0.03
GJ 825	37	5474	1.094	0.101	−4.673	0.051	2593 ± 137	0.04 \| 0.1
							7038 ± 2700	0.0002 \| 0.01
GJ 832	172	5632	0.699	0.118	−5.175	0.072	2297 ± 54	<0.1 \| <0.01
GJ 876	96	3261	0.918	0.112	−5.435	0.073	−	−
GJ 880	125	4450	1.635	0.072	−4.681	0.036	−	−
GJ 887	79	2120	1.131	0.114	−4.797	0.060	−	−
GJ 908	39	3525	0.490	0.124	−5.326	0.095	−	−

Notes. In Cols. 4 and 5 we show, respectively, the S index obtained for each star in the sample and its variability. In Cols. 6 and 7 we show the chromospheric activity levels measured from the log $R_{H K}^{'}$ $$\[R_{H K}^{\prime}$\$ indicator and their standard deviation. Finally, we report the detected magnetic activity cycles with their FAPs in Cols. 8 and 9, respectively. With ^IB and ^IB2 we highlight the cycles extracted from Ibañez Bustos et al. (2019b) and Ibañez Bustos et al. (2020), respectively.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.