2000A&A...361..153B


Query : 2000A&A...361..153B

2000A&A...361..153B - Astronomy and Astrophysics, volume 361, 153-158 (2000/9-1)

Kilohertz QPOs, the marginally stable orbit, and the mass of the central sources - a maximum likelihood test.

BULIK T., KLUZNIAK W. and ZHANG W.

Abstract (from CDS):

Kilohertz quasi perodic oscillations (QPOs) have been detected in more than a dozen LMXBs. We show that the observations are consistent with the assumption that the maximum-frequency QPOs occur in the innermost (marginally) stable orbit allowed by general relativity. On this assumption, taking the masses of the compact objects to be randomly distributed in some interval, we use the maximum likelihood method to determine the minimum and maximum mass in the parent distribution of kHz QPO sources. At the 99% confidence level, we find the mass range of the accreting compact objects to be (1.55M, 2.40M), in remarkable agreement with the expected mass range of neutron stars in LMXBs.

Abstract Copyright:

Journal keyword(s): stars: binaries: general - stars: oscillations - X-rays: stars

Simbad objects: 18

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Number of rows : 18
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 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 547 1
2 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 886 1
3 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1596 0
4 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 844 1
5 4U 1642-45 LXB 16 45 47.7 -45 36 40     14.30     ~ 401 1
6 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 425 0
7 X Ara X-1 LXB 17 06 15.314 -43 02 08.69           ~ 258 1
8 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 379 0
9 INTREF 776 LXB 17 23 38.7 -37 39 42           ~ 28 0
10 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5     15.50     ~ 803 1
11 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 410 0
12 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 445 0
13 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 634 1
14 V* NP Ser LXB 18 16 01.389 -14 02 10.62   18.8       K 625 2
15 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 965 1
16 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1095 1
17 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 146 0
18 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1117 1

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2023.02.08-05:54:35

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