2022PASJ...74..974A

Query : 2022PASJ...74..974A

2022PASJ...74..974A - Publ. Astron. Soc. Jap., 74, 974-990 (2022/August-4)

Decades-long variations in NS-LMXBs observed with MAXI/GSC, RXTE/ASM, and Ginga/ASM.

ASAI K., MIHARA T. and MATSUOKA M.

Abstract (from CDS):

We investigate the decades-long X-ray variations in bright low-mass X-ray binaries containing a neutron star (NS-LMXBs). The light curves of MAXI/GSC and RXTE/ASM cover ∼26 yr, and high-quality X-ray light curves are obtained from 33 NS-LMXBs. Among these, together with Ginga/ASM, two sources (GX 3+1 and GX 9+1) showed an apparent sinusoidal variation with respective periods of ∼5 and ∼10 yr in the 34 yr light curve. Their X-ray luminosities were (1-4) × 1037 erg s–1 in the middle of the NS-LMXB luminosity distribution. Seven other sources (Ser X-1, 4U 1735-444, GX 9+9, 4U 1746-37, 4U 1708-40, 4U 1822-000, and 1A 1246-588) have similar sinusoidal variations, although the profiles (amplitude, period, and phase) are variable. Compering the 21 sources with known orbital periods, one possible cause of the long-term sinusoidal variation might be mass-transfer cycles induced by irradiation to the donor star.

Abstract Copyright: © The Author(s) 2022. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

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

Simbad objects: 46

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Number of rows : 46
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 4U 0513-40 LXB 05 14 06.59 -40 02 37.0           ~ 176 1
2 X LMC X-2 LXB 05 20 29.0 -71 57 33 17.20 18.00 18.0     ~ 189 0
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 4U 0919-54 LXB 09 20 26.4818170056 -55 12 24.512806404 20.40 21.30 21.0     ~ 175 0
6 4U 1246-58 LXB 12 49 39.4 -59 05 14   19.24 18.99     ~ 103 0
7 V* GR Mus LXB 12 57 37.1833002949 -69 17 18.996899563   19.40 19.1     ~ 275 0
8 4U 1323-62 LXB 13 26 37.0 -62 08 09           ~ 192 0
9 MAXI J1348-630 HX? 13 48 12.7388336424 -63 16 29.709083208           ~ 201 0
10 V* BR Cir HXB 15 20 40.8532547060 -57 10 00.206639033   21.4 21.4     B5-A0I 849 1
11 V* QU TrA LXB 15 47 53.6 -62 34 11           ~ 168 0
12 V* LU TrA LXB 16 01 02.4 -60 44 19 18.35 19.05 18.6     ~ 90 0
13 V* QX Nor LXB 16 12 43.0 -52 25 26           ~ 946 1
14 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
15 4U 1624-49 LXB 16 28 02.825 -49 11 54.61           ~ 250 0
16 MAXI J1631-479 XB? 16 31 14.06 -47 48 25.6           ~ 56 0
17 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0
18 4U 1642-45 LXB 16 45 48.1 -45 36 42           ~ 467 1
19 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 473 0
20 1RXS J170855.6-440653 LXB 17 08 54.346 -44 06 08.38           ~ 406 1
21 RX J1709.5-2639 LXB 17 09 30.5 -26 39 26           ~ 130 0
22 4U 1708-40 LXB 17 12 23.6 -40 50 36           ~ 70 0
23 4U 1722-30 LXB 17 27 33.25 -30 48 07.4     12.50     ~ 278 1
24 V* V2216 Oph LXB 17 31 44.17 -16 57 40.9 16.40 17.10 16.8     ~ 329 1
25 1ES 1735-26.9 LXB 17 38 17.6 -26 59 39           ~ 177 0
26 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 480 0
27 SWIFT J174510.8-262411 LXB 17 45 10.849 -26 24 12.60           ~ 78 0
28 [KRL2007b] 275 LXB 17 47 02.60 -28 52 58.9     14.20     ~ 182 0
29 X Sgr X-1 LXB 17 47 56.3 -26 33 47           ~ 402 0
30 NAME TER 5 X-1 LXB 17 48 05.225 -24 46 47.66           ~ 229 1
31 4U 1745-203 LXB 17 48 53.40 -20 21 43.0           ~ 86 1
32 4U 1746-371 LXB 17 50 12.66 -37 03 08.2     8.43     ~ 206 1
33 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 705 1
34 X Sgr X-3 LXB 18 01 32.6 -20 31 45           ~ 254 1
35 V* V5512 Sgr LXB 18 14 31.3 -17 09 23     12.73     K5III 449 0
36 V* NP Ser LXB 18 16 01.7 -14 02 09   18.8       K 683 2
37 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
38 4U 1823-00 LXB 18 25 22.3 -00 00 41   23.00 22     ~ 95 0
39 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0
40 V* MM Ser LXB 18 39 57.8 +05 02 13   19.2 19.2     ~ 378 0
41 2MAXI J1900-248 LXB 19 00 08.65 -24 55 13.7     18.09     ~ 226 0
42 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1186 1
43 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0
44 CXOU J212958.1+121002 XB* 21 29 58.06 +12 10 02.6     16.6     ~ 87 1
45 4U 2129+12 LXB 21 29 58.3124 +12 10 02.670 14.50 15.70 15.8     ~ 326 1
46 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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