A photometric long-term study of chemically peculiar stars in open clusters

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Volume 525 (January 2011)

A&A, 525 (2011) A16

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Table 1

Results for the observed sample of stars in eleven open clusters.

Cluster	Name	W	V	Δa	Spec.	Mem	Δt	Num	Period	Period_Lit
			[mag]	[mmag]			[d]		[d]	[d]

Cr 132	HD 56343^a	27	9.25	+35	CP	−	675.2737	15	3.25
	HD 56046	10	7.59		B6 V
	HD 56162	12	7.80		A1 V
IC 4725	BD−19 5044L	98	10.20	+16	CP	p	7.0674	5	variable
	HD 170836	167	8.95	+46	CP	y	1819.1000	10	0.9(?)
	HD 170860A	153	9.40	+22	CP	p	1819.1000	10	variable
	HD 170719	91	8.10		B5 III
	HD 170820	150	7.38		K0 III
	HD 170682	50	7.95		B5 II/III
NGC 2516	CP−60 944	112	9.85	+21	CP	y	337.1385	17	1.10
	HD 65712	230	9.86	+70	CP	p	9.1297	13	1.88	1.943¹
	HD 66295	26	9.10	+45	CP	y	9.1303	11	2.45	2.45004²
	CP−60 947	13	8.06		B8 V
	CP−60 952	9	9.30		B9 V
NGC 3114	HD 87240	25	8.65	+30	CP	p	1734.3087	28	variable
	HD 87405^a	108	8.50	+17	CP	?	1734.2957	28	2.113
	HD 87752	211	9.82	+6	CP	y	4.9909	5	constant
	HD 304841	80	9.99	+36	CP	p	349.1259	21	0.6978
									longer^b
	HD 304842	234	9.72	+19	CP	y	1394.2079	15	2.31808	2.31873²
	HD 87137	8	8.30		B8 III
	HD 87349	86	8.62		B8 V
NGC 3228	HD 89856^a	3	9.09	+32	CP	n	1734.2579	28	4.556	4.565³
	HD 298053	16	10.69	+15	CP	p	97.8085	21	0.84 or 0.94
	HD 89900	5	8.19		A0 IV
	HD 89915	6	7.90		A0 V
NGC 3532	HD 96040	413	10.00	+60	CP	p	1392.1704	17	1.13
									longer^b
	HD 96729	449	10.00	+65	CP	n	11.9983	12	1.39
	HD 96011	467	9.05		A0 V
	HD 96226	409	8.03		B8
NGC 5460	HD 122983	142	9.90	+20	CP	p	1392.1247	17	3.4 < P < 3.8
	HD 123225	55	8.85	+14	CP	y	1385.1544	10	constant
	HD 123202	79	8.90		B9 IV/V
	HD 123224	50	8.00		B8 II
NGC 5662	CP−56 6330	85	10.89	+33	CP	n	92.7977	17	0.81
	HD 127924^a	187	9.20	+29	CP	p	97.8059	19	3.55
	CP−56 6334	104	9.90		B8 V
	HD 127817	81	9.15		B7 IV
	HD 127835	97	9.40		B7 V
NGC 6281	HD 153947	9	8.80		CP	n	1395.1398	16	2.6841	2.662⁴
	HD 153948	15	9.35	+40	CP	y	1395.1359	16	1.64	1.6370²
	BD−37 11237	6	8.60		B9
	BD−37 11241	5	8.30		A2
NGC 6405	CD−32 13119	7	10.95	+33	CP	p	6.0188	6	data too poor
	HD 318100	19	8.82	+67	CP	y	1819.0577	13	data too poor	1.03012²
	HD 318107	77	9.35	+94	CP	y	1819.0681	13	data too poor	4.527²
										9.7085⁵
										52.6²
	HD 160260	70	8.35		B9
	HD 160335	2	7.30		B3 V
NGC 6475	HD 162305	14	7.80	+16	CP	y	1820.0393	14	variable
	HD 320764	23	8.90	+20	CP	y	1820.0480	14	variable?
	HD 162515	42	6.52		B9 V

Notes. The primary targets are denoted with a spectral class “CP”. The data for the V magnitude, the spectral classification of the comparison stars, and Δa measurements were taken from WEBDA (number W); the membership flag as determined in Sect. 5. In addition, the results of our time series analysis with the time base of the observations (Δt) and the number of data points (Num) for Strömgren uvby are listed. The derived periods are significant to the last listed digit.

^(a)

Hipparcos data available; results are discussed in Sect. 4;

^(b)

our data set shows also a longer period which can not be resolved.

⁽¹⁾

⁽²⁾

⁽³⁾

⁽⁴⁾

⁽⁵⁾

Manfroid & Mathys (2000).

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