2011A&A...526A..94R

Query : 2011A&A...526A..94R

2011A&A...526A..94R - Astronomy and Astrophysics, volume 526A94-94 (2011/2-1)

On the nature of the break in the X-ray luminosity function of low-mass X-ray binaries.

REVNIVTSEV M., POSTNOV K., KURANOV A. and RITTER H.

Abstract (from CDS):

We analyze a flux-limited sample of persistent and bright (with 2-10keV fluxes exceeding 1.4x10–10erg/s/cm2) low-mass X-ray binaries (LMXBs) in our Galaxy. It is demonstrated that the majority of binary systems with X-ray luminosities below logL(erg/s)∼37.3 have unevolved secondary companions (except for those with white dwarf donors), while systems with higher X-ray luminosity harbor predominantly giant donors. Mass transfer in binary systems with giants significantly shortens their lifetime thus steepening the X-ray luminosity function of LMXBs at high luminosity. We argue that this is why the LMXB luminosity function constructed from observations of sources in our and distant galaxies demonstrates a break at logL(erg/s)∼37.3.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - stars: low-mass - stars: luminosity function, mass function - stars: neutron - X-rays: stars

Simbad objects: 41

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Number of rows : 41
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 4U 0513-40 LXB 05 14 06.59 -40 02 37.0           ~ 176 1
3 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
4 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 594 1
5 V* GR Mus LXB 12 57 37.1833002949 -69 17 18.996899563   19.40 19.1     ~ 275 0
6 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
7 V* BR Cir HXB 15 20 40.8532547060 -57 10 00.206639033   21.4 21.4     B5-A0I 849 1
8 V* QU TrA LXB 15 47 53.6 -62 34 11           ~ 168 0
9 V* LU TrA LXB 16 01 02.4 -60 44 19 18.35 19.05 18.6     ~ 90 0
10 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
11 4U 1624-49 LXB 16 28 02.825 -49 11 54.61           ~ 250 0
12 V* KZ TrA LXB 16 32 16.79 -67 27 39.3 17.40 18.60 18.5     ~ 626 1
13 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0
14 4U 1642-45 LXB 16 45 48.1 -45 36 42           ~ 467 1
15 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 473 0
16 X Ara X-1 LXB 17 06 15.2 -43 02 11           ~ 296 1
17 4U 1705-32 LXB 17 08 55.1 -32 18 49           ~ 66 0
18 4U 1708-40 LXB 17 12 23.6 -40 50 36           ~ 70 0
19 4U 1722-30 LXB 17 27 33.25 -30 48 07.4     12.50     ~ 278 1
20 V* V2216 Oph LXB 17 31 44.17 -16 57 40.9 16.40 17.10 16.8     ~ 329 1
21 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 719 1
22 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 480 0
23 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
24 2E 3943 LXB 17 46 05.3 -29 30 52           ~ 217 1
25 X Sgr X-1 LXB 17 47 56.3 -26 33 47           ~ 402 0
26 4U 1746-371 LXB 17 50 12.66 -37 03 08.2     8.43     ~ 206 1
27 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 705 1
28 X Sgr X-3 LXB 18 01 32.6 -20 31 45           ~ 254 1
29 V* V5512 Sgr LXB 18 14 31.3 -17 09 23     12.73     K5III 449 0
30 4U 1812-12 LXB 18 15 06.4 -12 05 48           ~ 124 2
31 V* NP Ser LXB 18 16 01.7 -14 02 09   18.8       K 683 2
32 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
33 4U 1823-00 LXB 18 25 22.3 -00 00 41   23.00 22     ~ 95 0
34 V* V691 CrA LXB 18 25 46.8185061768 -37 06 18.529336656 14.30 15.20 15.1     ~ 461 0
35 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0
36 V* MM Ser LXB 18 39 57.8 +05 02 13   19.2 19.2     ~ 378 0
37 4U 1850-086 LXB 18 53 04.89 -08 42 19.7 20.40 21.20 21.0     ~ 266 1
38 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
39 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0
40 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1229 1
41 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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