2015MNRAS.454.1231W

Query : 2015MNRAS.454.1231W

2015MNRAS.454.1231W - Mon. Not. R. Astron. Soc., 454, 1231-1237 (2015/December-1)

Investigation of the emission radii of kHz QPOs for the accreting millisecond X-Ray pulsars, Atoll and Z sources.

WANG D.H., CHEN L., ZHANG C.M., LEI Y.J., QU J.L. and SONG L.M.

Abstract (from CDS):

We infer the emission positions of twin kilohertz quasi-periodic oscillations (kHz QPOs) in neutron star low-mass X-ray binaries (NS-LMXBs) based on the Alfvén wave oscillation model (AWOM). For most sources, the emission radii of kHz QPOs cluster around a region of 16-19 km with the assumed NS radii of 15 km. Cir X-1 has the larger emission radii of 23 ∼ 38 km than those of the other sources, which may be ascribed to its large magnetosphere-disc radius or strong NS surface magnetic field. SAX J1808.4-3658 is also a particular source with the relative large emission radii of kHz QPOs of 20 ∼ 23 km, which may be due to its large inferred NS radius of 18 ∼ 19 km. The emission radii of kHz QPOs for all the sources are larger than the NS radii, and the possible explanations of which are presented. The similarity of the emission radii of kHz QPOs ( ∼ 16-19 km) for both the low/high luminosity Atoll/Z sources is found, which indicates that both sources share the similar magnetosphere-disc radii.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): accretion, accretion discs - binaries: close - stars: neutron - X-rays: binaries

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 594 1
2 V* BR Cir HXB 15 20 40.8532547060 -57 10 00.206639033   21.4 21.4     B5-A0I 849 1
3 V* QX Nor LXB 16 12 43.0 -52 25 26           ~ 946 1
4 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
5 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0
6 4U 1642-45 LXB 16 45 48.1 -45 36 42           ~ 467 1
7 [KRL2007b] 214 LXB 17 00 58.46 -46 11 08.6           ~ 296 0
8 4U 1701-407 LXB 17 01 44.3 -40 51 30           ~ 47 0
9 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 473 0
10 X Ara X-1 LXB 17 06 15.2 -43 02 11           ~ 296 1
11 1RXS J170855.6-440653 LXB 17 08 54.346 -44 06 08.38           ~ 406 1
12 IGR J17191-2821 XB* 17 19 15 -28 17.9           ~ 52 0
13 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
14 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 437 0
15 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 480 0
16 SAX J1750.8-2900 LXB 17 50 24.42 -29 02 15.4           ~ 146 0
17 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 705 1
18 [KRL2007b] 304 LXB 18 06 59.8 -29 24 30           ~ 228 0
19 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
20 V* NP Ser LXB 18 16 01.7 -14 02 09   18.8       K 683 2
21 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
22 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1186 1
23 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0
24 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 154 0
25 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1229 1

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