4 Accreting Millisecond X-ray Pulsars
147
Table 4.1
Accreting X-ray pulsars in low mass X-ray binaries
Source
ν
s
P
b
f
x
M
c,min
Companion type
Ref.
(Hz)
(h)
(M
)
(M
)
Accreting millisecond pulsars
SAX J1808.4-3658
401
2.01
3.8
× 10 −5
0.043
BD
[41, 123, 125, 242, 262]
XTE J1751-305
435
0.71
1.3
× 10 −6
0.014
He WD
[204, 241]
XTE J0929-314
185
0.73
2.9
× 10 −7
0.0083
C/O WD
[99, 229, 285]
XTE J807-294
190
0.67
1.5
× 10 −7
0.0066
C/O WD
[60, 163, 205, 259, 287]
XTE J1814-338
314
4.27
2.0
× 10 −3
0.17
MS
[202, 239]
IGR J00291+5934
599
2.46
2.8
× 10 −5
0.039
BD
[37, 88, 100, 126, 245, 249]
HETE J1900.1-2455
377
1.39
2.0
× 10 −6
0.016
BD
[158]
Swift J1756.9-2508
182
0.91
1.6
× 10 −7
0.007
He WD
[170, 260]
Aql X-1
550
18.95
N/A
0.6 a
MS
[44, 355]
SAX J1748.9-2021
442
8.77
4.8
× 10 −4
0.1
MS/SubG ?
[2, 253]
NGC6440 X-2
206
0.95
1.6
× 10 −7
0.0067
He WD
[3]
IGR J17511-3057
245
3.47
1.1
× 10 −3
0.13
MS
[211, 289]
Swift J1749.4-2807
518
8.82
5.5
× 10 −2
0.59
MS
[6]
IGR J17498-2921
401
3.84
2.0
× 10 −3
0.17
MS
[244]
IGR J18245-2452
254
11.03
2.3
× 10 −3
0.17
MS
[247]
Mildly recycled X-ray pulsar
IGR J17480-2466
11
21.27
2.1
× 10 −2
0.4
SubG
[46, 239, 321]
Slow pulsars in LMXBs & IMXBs
2A 1822-371
1.7
5.57
2
× 10 −2
0.33
?
[152]
4U 1626-67
0.13
0.69
1.3
× 10 −6
0.06
WD or He star
[26, 62, 187]
GRO 1744-28
2.14
282.24
1.3
× 10 −4
<
0.3
Giant
[26, 66, 367]
Her X-1
0.81
40.80
0.85
∼2 a
MS
[26, 62]
(continued)