A search for dormant binaries with degenerate components in ω Centauri and NGC 6397

M. Rozyczka; J. Kaluzny; P. Pietrukowicz; W. Pych; M. Catelan; C. Contreras; I. B. Thompson

doi:10.1051/0004-6361/201015295

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Volume 524 (December 2010)

A&A, 524 (2010) A78

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Table 1

Basic information on the target objects.

Cluster	Star	α ₂₀₀₀	δ ₂₀₀₀	p _m ^*	L _X ^**	V	B − V	Ref.^†
		[h:m:s]	[°:′:″]		[10³⁰ erg s^-1]	[mag]	[mag]

ω Cen	V214	13:27:21.82	−47:37:19.0	97	<13	16.55	0.25	1, 2
ω Cen	V240	13:27:28.68	−47:26:19.5	99	<1.2	16.31	0.30	1, 2
ω Cen	V251	13:27:28.02	−47:26:43.7	97	<1.2	16.17	0.25	1
ω Cen	V254	13:27:28.61	−47:27:39.0	99	<1.2	16.41	0.25	1, 2
ω Cen	NV334	13:27:23.39	−47:29:11.9	88	<1.2	18.63	0.35	1
ω Cen	NV360	13:26:02.06	−47:32:23.6	100	<1.2	17.09	0.25	1
ω Cen	NV400	13:26:10.09	−47:31:50.3	99	<1.2	16.56	0.20	1
NGC 6397	V17	17:40:43.78	−53:41:16.2	100	0.4	16.17	0.40	3, 4
NGC 6397	V20	17:40:41.66	−53:40:33.1	100	1.6	15.75	0.40	3, 4
NGC 6397	V27	17:41:13.80	−53:41:14.1	–	–	18.19	0.45	3, 4
NGC 6397	V36	17:40:44.10	−53:42:11.3	–	0.4	16.48	0.60	3, 4

Notes.

^(*)

Membership probability: Bellini et al. (2009) for V214-NV400; Strickler et al. (2009) and Anderson (2010, priv. comm.) for V17-V20; no data available for V27 and V36.

^(**)

X-ray luminosity: Gendre et al. (2003) for V214; Haggard et al. (2004) for V240-NV400; Bogdanov et al. (2010) for V17-V20 and V36; no data available for V27.

^(†)

Photometry: 1 – Kaluzny et al. (2004); 2 – Weldrake et al. (2007); 3 – Kaluzny et al. (2006); 4 – our unpublished data collected in 2009.

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