2014MNRAS.437.3863K

Query : 2014MNRAS.437.3863K

2014MNRAS.437.3863K - Mon. Not. R. Astron. Soc., 437, 3863-3882 (2014/February-1)

Spin period change and the magnetic fields of neutron stars in Be X-ray binaries in the Small Magellanic Cloud.

KLUS H., HO W.C.G., COE M.J., CORBET R.H.D. and TOWNSEND L.J.

Abstract (from CDS):

We report on the long-term average spin period, rate of change of spin period and X-ray luminosity during outbursts for 42 Be X-ray binary systems in the Small Magellanic Cloud. We also collect and calculate parameters of each system and use these data to determine that all systems contain a neutron star which is accreting via a disc, rather than a wind, and that if these neutron stars are near spin equilibrium, then over half of them, including all with spin periods over about 100s, have magnetic fields over the quantum critical level of 4.4x10¹³ G. If these neutron stars are not close to spin equilibrium, then their magnetic fields are inferred to be much lower, of the order of 10⁶-10¹⁰ G, comparable to the fields of neutron stars in low-mass X-ray binaries. Both results are unexpected and have implications for the rate of magnetic field decay and the isolated neutron star population.

Journal keyword(s): accretion, accretion discs - stars: magnetic field - stars: neutron - pulsars: general - X-rays: binaries

Simbad objects: 50

Full paper

View the references in ADS

Number of rows : 50

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	[MA93] 172	HXB	00 47 23.3388222768	-73 12 27.370134648		15.85	15.85		15.872	B1-B1.5V	51	0
2	SXP 25.5	HXB	00 48 14.1209478096	-73 10 03.933642936	15.06	15.56	15.847		15.693	B1.5e	28	1
3	RX J0049.0-7250	HXB	00 49 03.35	-72 50 52.4		17.01	16.898		16.686	B3:V	51	0
4	SXP 18.3	HXB	00 49 11.4583157496	-72 49 37.499240568	15.16	15.80	15.608	15.42	15.384	~	40	0
5	[MA93] 300	HXB	00 49 29.848	-73 10 58.33	15.36	15.85	16.249	15.38	15.950	B1e	22	1
6	LIN 139	HXB	00 49 42.0078068952	-73 23 14.676382752	14.09	15.00	14.98		14.70	O9.5-B0.5III-V	72	0
7	SXP 214	HXB	00 50 11.2696971720	-73 00 25.972319016		15.22	15.33	15.47	15.207	B9(II)	17	0
8	V* DZ Tuc	HXB	00 50 44.7079466208	-73 16 05.430164196	14.46	15.37	15.396		15.225	B0-B0.5V	75	0
9	[MA93] 413	HXB	00 50 56.9992401408	-72 13 34.582439136		14.97	15.05			B0.5III-V	59	0
10	SXP 4.78	HXB	00 51 38.7742234656	-72 17 04.796861748	14.63	15.66	15.63		15.44	B0V-B1Ve	48	0
11	LIN 193	HXB	00 51 52.0250520000	-73 10 34.140066780	13.39	14.38	14.459	14.24	14.28	O9.5-B0V	72	0
12	AzV 102	HXB	00 51 53.1358981896	-72 31 48.721904580	13.66	14.79	14.38		14.40	B0-5(II)	71	0
13	LIN 198	HXB	00 52 05.6251611744	-72 26 04.228773036	13.86	14.91	14.927	14.91	14.794	B0-5(II)e	158	0
14	SXP 82.4	HXB	00 52 08.9591015832	-72 38 03.307691544	14.33	15.15	15.23		14.83	B1-5(II)e	37	0
15	LIN 203	HXB	00 52 13.9956976512	-73 19 18.812945496		14.66	14.67		14.534	O9.5IIIe/B0Ve	86	0
16	NAME SMC	G	00 52 38.0	-72 48 01		2.79	2.2			~	10839	1
17	SXP 327	HXB	00 52 52.2273385944	-72 17 15.106259724	15.83	16.41	16.62	16.43	16.82	~	24	0
18	LIN 221	HXB	00 52 55.2656173752	-71 58 06.287817144	14.37	15.47	15.53		15.34	B0-B1III-V	48	0
19	SXP 95.2	HXB	00 53 26.4	-72 49 16						~	18	1
20	RX J0053.9-7226	HXB	00 53 55.181	-72 26 44.88		14.65	14.72		14.757	B1III	92	0
21	SXP 342	HXB	00 54 03.8561131320	-72 26 32.965087524	13.82	14.95	14.94	14.80	14.79	~	19	0
22	X SMC X-2	HXB	00 54 33.43	-73 41 01.3	13.77	16.40	16.38		14.67	O9.5III-V	126	0
23	LIN 268	HXB	00 54 55.8845128080	-72 45 10.958407380	13.83	14.73	15.003	14.73	14.784	B1e	49	0
24	[MA93] 810	HXB	00 54 56.1754603176	-72 26 47.859057060	14.17	15.24	15.28		15.327	O9V	72	0
25	RX J0055.2-7238	HXB	00 55 18.4407888192	-72 38 52.029653424		16.02	16.022		15.711	O9.5V	35	0
26	SXP 645	HXB	00 55 35.1438131544	-72 29 06.635018364	13.60	14.65	14.69	14.21	14.67	~	20	0
27	[MA93] 904	HXB	00 56 05.5347974352	-72 21 59.452153740		15.84	15.88		15.494	B1V	33	0
28	RX J0057.4-7325	HXB	00 57 27.000	-73 25 19.55	14.56	15.62	15.67	15.43	15.67	B3-B5Ib-II?	34	0
29	[MA93] 1020	HXB	00 57 36.0162576624	-72 19 34.056483744	14.89	15.95	16.008	15.79	15.806	B0/4e	42	0
30	[MA93] 1036	HXB	00 57 49.5745148088	-72 02 35.873596896		15.52	15.64			B0-B2III-V	54	0
31	[MA93] 1038	HXB	00 57 50.3868809664	-72 07 56.130650112	14.63	15.64	15.69		15.420	B1-2(Be-Fe)	42	0
32	RX J0058.2-7231	HXB	00 58 12.5869662000	-72 30 48.759613812	13.91	14.98	14.87		14.62	B0IIIe	60	0
33	SXP 202	HXB	00 59 21.0398312736	-72 23 17.305459368	13.81	14.96	14.97		15.07	B0-B1V	42	0
34	[MA93] 1147	HXB	00 59 28.6840366080	-72 37 04.202082408	14.55		15.31			B0-5(III)e	16	0
35	[MA93] 1240	HXB	01 01 02.8880678424	-72 06 58.964665824		15.68	15.757	15.52	15.576	B0-B2III-V	48	0
36	[MA93] 1257	HXB	01 01 20.6635900032	-72 11 18.965108724	14.41	15.36	15.49		15.53	B0.5-B2IV-V	47	0
37	LIN 389	HXB	01 01 52.2957451944	-72 23 34.045082376	13.84	14.57	14.94	15.48	14.85	O9-B0III	39	0
38	AzV 294	HXB	01 02 06.6797731272	-71 41 16.119360960	13.54	14.52	14.60	15.20	14.42	B0-B0.5III-V	31	0
39	SXP 6.85	HXB	01 02 53.3180253744	-72 44 35.166214716		14.51	14.59			O9.5-B0IV-V	59	0
40	[MA93] 1367	HXB	01 03 13.9173060552	-72 09 14.258500452		14.70	14.79	15.0		B0.5IV-V	92	2
41	[MA93] 1393	HXB	01 03 37.5349856136	-72 01 33.204096336		14.54	14.65			B0III-V	70	0
42	SXP 11.5	HXB	01 04 42.28	-72 54 03.7		14.81	14.81			O8.5-9.5IIIe	31	1
43	[MA93] 1557	HXB	01 05 55.4	-72 03 49	14.63	15.61	15.63	15.54		~	25	0
44	NAME Magellanic Clouds	GrG	03 00	-71.0						~	6820	1
45	V* X Per	HXB	03 55 23.0777456088	+31 02 45.039836148	6.090	6.840	6.720			O9.5III	962	0
46	LS V +44 17	HXB	04 40 59.3296237272	+44 31 49.258049376	11.02	11.42	10.73	10.28	9.76	B0.2Ve	127	0
47	HD 245770	HXB	05 38 54.5748918624	+26 18 56.836952784	9.30	9.84	9.39	8.77	8.30	O9/B0III/Ve	963	0
48	GRO J1008-571	HXB	10 09 46.9642314696	-58 17 35.603851848				14.63		B0e	224	0
49	WRAY 15-793	HXB	11 20 57.1736884968	-61 55 00.166078020	12.81	13.06	12.12			O9.5III/Ve	201	0
50	V* BP Cru	HXB	12 26 37.5605188992	-62 46 13.261044684		12.70	10.66			B1.5Iaeq	670	0

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