2007MNRAS.381..790M

Query : 2007MNRAS.381..790M

2007MNRAS.381..790M - Mon. Not. R. Astron. Soc., 381, 790-796 (2007/October-3)

Is there a link between the neutron-star spin and the frequency of the kilohertz quasi-periodic oscillations?

MENDEZ M. and BELLONI T.

Abstract (from CDS):

There is a general consensus that the frequencies of the kilohertz quasi-periodic oscillations (kHz QPOs) in neutron-star low-mass X-ray binaries are directly linked to the spin of the neutron star. The root of this idea is the apparent clustering of the ratio of the frequency difference of the kHz QPOs, and the neutron-star spin frequency, Δν/νs, at around 0.5 and 1 in 10 systems for which these two quantities have been measured. Here, we re-examine all available data of sources for which there exist measurements of two simultaneous kHz QPOs and spin frequencies, and we advance the possibility that Δν and νs are not related to each other. We discuss ways in which this possibility could be tested with current and future observations.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): stars: neutron - X-rays: binaries

CDS comments: SAX J1808.4-3568 is a misprint for SAX J1808.4-3658, XTE J1807-214 is a misprint for XTE J1807-294.

Simbad objects: 15

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Number of rows : 15
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* UY Vol LXB 07 48 33.71 -67 45 07.7 16.10 17.00 16.9 16.7 17.05 ~ 660 0
2 V* BW Ant LXB 09 29 20.19 -31 23 03.2   18.50 18.63     ~ 194 0
3 V* QX Nor LXB 16 12 43.0 -52 25 26           ~ 946 1
4 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0
5 X Ara X-1 LXB 17 06 15.2 -43 02 11           ~ 296 1
6 IGR J17191-2821 XB* 17 19 15 -28 17.9           ~ 52 0
7 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
8 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 437 0
9 SAX J1750.8-2900 LXB 17 50 24.42 -29 02 15.4           ~ 146 0
10 [KRL2007b] 291 LXB 17 51 13.49 -30 37 23.4           ~ 262 0
11 [KRL2007b] 304 LXB 18 06 59.8 -29 24 30           ~ 228 0
12 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
13 V* V5511 Sgr LXB 18 13 39.03 -33 46 22.3   18.61 18.33 18.05   ~ 215 0
14 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
15 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0

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