K2 space photometry reveals rotational modulation and stellar pulsations in chemically peculiar A and B stars

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Volume 616 (August 2018)

A&A, 616 (2018) A77

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Table 3.

Properties of the CP stars for which variability was detected using K2 observations.

EPIC ID	HD	Camp.	ΔT (d)	N	P_rot (d) This work	P_rot (d) Literature	B-field	Fig. No.
Stars with rotational modulation (figures in Appendix A):
201667495	107000	10	75.35	2392	5.641 ± 0.001	5.638^l	DD^k	3
201777342	97859	01	78.74	3155	0.792122 ± 0.000004	0.7921 ± 0.0002^p	DD^f	A.1
203092367	150035	02	62.13	2145	2.403 ± 0.002	2.3389 ± 0.0013^p	NDⁿ	A.2
203814494	142990	02	67.96	2244	0.97892 ± 0.00002	0.978832 ± 0.000002^m	DD^e	A.3
204964091	147010	02	77.25	2302	3.9216 ± 0.0003	3.9207 ± 0.0003^c	DDⁱ	A.4
210964459	26571	04	70.82	2826	15.733 ± 0.002	15.7505 ± 0.0004^p	−	A.5
213786701	173657	07	81.28	3361	1.93810 ± 0.00006	1.93789 ± 0.00005^g, 1.94 ± 0.05^f	ND^f	A.6
214197027	173857	07	81.32	3389	1.7348 ± 0.0003	−	−	A.7
214775703	178786	07	80.87	3366	1.76413 ± 0.00004	−	−	A.8
215357858	174356	07	81.32	3406	4.045 ± 0.003	4.0431 ± 0.0003^g	−	A.9
215431167	174146	07	81.32	3416	11.1820 ± 0.0005	11.185 ± 0.001^g	−	A.10
215584931	172480	07	81.30	3422	0.87133 ± 0.00001	0.87134 ± 0.00001^g	−	A.11
215876375	184343	07	81.07	3364	7.1987 ± 0.0006	−	−	A.12
216005035	182459	07	81.32	3426	1.26055 ± 0.00002	−	−	A.13
217323447	180303	07	81.32	3372	2.7927 ± 0.0002	−	−	A.14
218676652	173406	07	81.32	3230	4.562 ± 0.002	5.095^o, 4.6 ± 0.3^f	ND^f	A.15
218818457	176330	07	81.26	3193	13.26 ± 0.01	−	−	A.16
219198038	177013	07	81.28	3293	4.8730 ± 0.0001	4.873^o, 4.9 ± 0.3^f	MD^f	A.17
224206658	165972	09	71.34	2938	2.7596 ± 0.0003	2.8 ± 0.1^f	DD^f	A.18
226097699	166190	09	70.40	2939	1.1696 ± 0.0001	−	−	A.19
226241087	164224	09	71.12	2947	0.73156 ± 0.00001	0.73 ± 0.01^f	DD^f	A.20
227108971	164190	09	68.64	2811	4.657 ± 0.002	−	−	A.21
227373493	166804	09	71.14	2919	3.7024 ± 0.0005	3.7035 ± 0.0002^g, 3.7 ± 0.2^f	DD^f	A.22
227825246	164085	09	71.34	3052	1.22079 ± 0.00002	1.22072 ± 0.00002^g	−	A.23
232147357	153192	11	68.55	2928	11.393 ± 0.003	11.357 ± 0.002^d	−	A.24
232176043	152834	11	67.83	2791	4.2919 ± 0.0007	4.2928 ± 0.0003^g, 4.4 ± 0.3^f	DD^f	A.25
232284277	155127	11	74.13	2949	5.5171 ± 0.0007	5.5243 ± 0.0004^g, 5.5 ± 0.4^f	DD^f	A.26
247729177	284639	13	80.52	3618	9.155 ± 0.001	−	−	A.27

Stars with rotational modulation and additional variability indicative of stellar pulsations (figures in Appendix B):
203749199	152366	02, 11	835.99	5209	3.2308 ± 0.0001	3.23 ± 0.01^f	DD^f	B.1
216956748	181810	07	80.83	3415	13.509 ± 0.009	−	−	B.2
217437213	177016	07	81.32	3397	3.276 ± 0.004	−	−	B.3
223573464	161851	09	71.34	2901	1.6209 ± 0.0007	−	−	B.4
225191577	164068	09	71.34	3031	2.4130 ± 0.0003	−	−	B.5
225990054	158596	09, 11	222.77	5796	2.02208 ± 0.00003	2.02206 ± 0.00005^d, 2.02 ± 0.02^f	DD^f	B.6
227231984	158336	11	73.21	3015	1.7609 ± 0.0008	1.76009 ± 0.00004^d	−	B.7
227305488	166542	09	68.64	2869	3.6331 ± 0.0003	−	−	B.8
228293755	165945	09	70.40	2858	2.1352 ± 0.0002	−	−	B.9
230753303	153997	11	74.13	3031	5.4966 ± 0.0006	−	−	B.10

Stars that show variability indicative of stellar pulsations yet lack clear rotational modulation (figures in Appendix C):
202060145	−	00	36.18	1685	−	1.1472^a	−	C.1
203917770	145792	02	65.73	2258	−	0.8478^q, 1.6956 ± 0.0005^p	DDⁿ	C.2
206120416	210424	03	67.73	2702	2.111 ± 0.003^†	3.9613 ± 0.0033^p, 1.4465^b	−	C.3
206326769	211838	03	69.16	2771	−	6.5633 ± 0.0063^j	ND^h	C.4
224947037	162814	09	71.34	3067	8.60 ± 0.05^†	−	−	C.5
246152326	220556	12	78.42	3258	−	−	−	C.6

Notes. Columns are EPIC and HD numbers; K2 campaign number; length of available K2 data, ΔT; number of data points, N; measured rotation period, P_rot; and its 3σ uncertainty using the formulae from Montgomery & O’Donoghue (1999); the literature rotation period (if available); and the first reference of the magnetic field detection (if available), where DD indicates a definite detection, MD indicates a marginal detection, and ND indicates a non-detection. A full discussion of each star and discrepancies in literature values for rotation periods are given in the text. References for literature rotation periods and magnetic field detections.

^(†)

We identify this as a possible rotation period for this star, but it does not represent a unique solution.

^(a)

Armstrong et al. (2015),

^(b)

Armstrong et al. (2016),

^(c)

Bailey & Landstreet (2013),

^(d)

Bernhard et al. (2015),

^(e)

Borra et al. (1983),

^(f)

Buysschaert et al. (2018b),

^(g)

Hümmerich et al. (2016),

^(h)

Makaganiuk et al. (2011),

⁽ⁱ⁾

Mathys (1995),

^(j)

Paunzen et al. (2013),

^(k)

Romanyuk & Kudryavtsev (2008),

^(l)

Romanyuk et al. (2015),

^(m)

Shultz et al. (2018),

⁽ⁿ⁾

Thompson et al. (1987),

^(o)

Watson et al. (2006),

^(p)

Wraight et al. (2012),

^(q)

Renson & Manfroid (2009).

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