2022ApJ...927..117W

Query : 2022ApJ...927..117W

2022ApJ...927..117W - Astrophys. J., 927, 117-117 (2022/March-1)

Gamma-Ray Spectral Properties of the Galactic Globular Clusters: Constraint on the Number of Millisecond Pulsars.

WU W., WANG Z., XING Y. and ZHANG P.

Abstract (from CDS):

We study the γ-ray spectra of 30 globular clusters (GCs) thus far detected with the Fermi Gamma-ray Space Telescope. Presuming that γ-ray emission of a GC comes from millisecond pulsars (MSPs) contained within the GC, a model that generates spectra for the GCs is built based on the γ-ray properties of the detected MSP sample. We fit the GCs' spectra with the model, and for 27 of them, their emission can be explained as arising from MSPs. The spectra of the other three, NGC 7078, 2MS-GC01, and Terzan 1, cannot be fit with our model, indicating that MSPs' emission should not be the dominant one in the first two and the third one has a unique hard spectrum. We also investigate six nearby GCs that have relatively high encounter rates compared to the comparison cases. The candidate spectrum of NGC 6656 can be fit with that of one MSP, supporting its possible association with the γ-ray source at its position. The five others do not have detectable γ-ray emission. Their spectral upper limits set limits of <=1 MSPs in them, consistent with the numbers of radio MSPs found in them. The estimated numbers of MSPs in the γ-ray GCs generally match well those reported for radio pulsars. Our studies of the γ-ray GCs and the comparison nearby GCs indicate that the encounter rate should not be the only factor determining the number of γ-ray MSPs a GC contains.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Globular star clusters - Gamma-ray sources - Millisecond pulsars

Simbad objects: 123

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Number of rows : 123
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 PSR J0023+0923 Psr 00 23 16.890 +09 23 24.18           ~ 137 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
3 PSR J0030+0451 Psr 00 30 27.42348 +04 51 39.7144           ~ 596 1
4 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 201 0
5 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
6 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 365 2
7 PSR J0248+4230 Psr 02 48 30.9841919 +42 30 20.516968           ~ 20 0
8 PSR J0251+2606 Psr 02 51 02.5204468 +26 06 09.937134           ~ 39 0
9 PSR J0340+41 Psr 03 40 23.2887 +41 30 45.300           ~ 91 0
10 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 1032 0
11 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
12 PSR J0533+6759 Psr 05 33 55.1422119 +67 59 17.482910           ~ 26 0
13 PSR J0605+3757 Psr 06 05 05.5444336 +37 57 35.996704           ~ 42 0
14 PSR J0610-2100 Psr 06 10 13.602953 -21 00 27.74435           ~ 116 0
15 PSR B0613-02.0 Psr 06 13 43.977070 -02 00 47.34294           ~ 319 1
16 PSR J0614-3329 Psr 06 14 10.3479 -33 29 54.116           ~ 134 1
17 PSR J0621+2514 Psr 06 21 10.8471680 +25 14 03.839264           ~ 24 0
18 PSR J0740+6620 Psr 07 40 45.799 +66 20 33.60           ~ 395 0
19 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 316 1
20 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
21 PSR J0931-1902 Psr 09 31 19.116246 -19 02 55.05445           ~ 60 0
22 PSR J0952-0607 Psr 09 52 08.319 -06 07 23.49           ~ 103 0
23 PSR J0955-6150 Psr 09 55 20.847467 -61 50 16.89532           ~ 42 0
24 PSR J1012+5307 Psr 10 12 33.4345449600 +53 07 02.548542576     19.5     DA 419 1
25 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
26 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 286 1
27 PSR J1035-6720 Psr 10 35 27.600 -67 20 15.36           ~ 34 0
28 PSR J1048+2339 Psr 10 48 43.4339582160 +23 39 53.577436140     19.47     ~ 82 0
29 PSR J1125-58 Psr 11 25 44.352943 -58 25 16.85965           ~ 55 1
30 PSR J1125-6014 Psr 11 25 55.243299 -60 14 06.80942           ~ 61 0
31 PSR J1142+01 Psr 11 42 50.1342774 +01 19 35.400210           ~ 29 1
32 PSR J1207-5050 Psr 12 07 21.811 -50 50 30.00           ~ 36 0
33 XSS J12270-4859 Psr 12 27 58.7476831464 -48 53 42.824592960           ~ 321 0
34 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 139 0
35 PSR J1302-32 Psr 13 02 25.5358887 -32 58 36.833496           ~ 35 0
36 PSR J1311-3430 Psr 13 11 45.7292612136 -34 30 30.294149760   21.0   18.8   ~ 181 1
37 PSR J1312+00 Psr 13 12 46.6406250 +00 51 00.071969           ~ 41 0
38 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
39 PSR J1431-4715 Psr 14 31 44.6313693632 -47 15 27.399549133           ~ 49 0
40 PSR J1446-4701 Psr 14 46 35.709721 -47 01 26.79678           ~ 82 1
41 PSR J1513-2550 Psr 15 13 23.32059 -25 50 31.2850           ~ 35 0
42 PSR J1514-4946 Psr 15 14 19.1142 -49 46 15.528           ~ 55 0
43 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
44 PSR J1536-49 Psr 15 36 23.2214355 -49 48 54.681702           ~ 37 1
45 PSR J1543-5149 Psr 15 43 44.145289 -51 49 54.71350           ~ 41 1
46 PSR J1544+4937 Psr 15 44 04.166 +49 37 57.45           ~ 89 1
47 PSR J1552+5437 Psr 15 52 53.33117 +54 37 05.7866           ~ 27 0
48 PSR J1555-2908 Psr 15 55 40.6585535732 -29 08 28.423239347           ~ 37 0
49 PSR J1600-3053 Psr 16 00 51.902514 -30 53 49.45343           ~ 218 0
50 PSR J1614-2230 Psr 16 14 36.50974 -22 30 31.5420           ~ 452 1
51 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
52 PSR J1622-0315 Psr 16 22 59.6408643864 -03 15 37.303251262           ~ 48 0
53 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
54 PSR J1625-0021 Psr 16 25 10.469 -00 21 26.73           ~ 35 0
55 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 231 0
56 PSR J1630+3734 Psr 16 30 36.4672852 +37 34 42.101440           ~ 48 0
57 PSR J1640+2224 Psr 16 40 16.744850 +22 24 08.84119           ~ 210 0
58 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
59 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
60 PSR J1658-5324 Psr 16 58 39.343556 -53 24 06.97315           ~ 47 0
61 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 668 0
62 PSR J1713+0747 Psr 17 13 49.5367813 +07 47 37.450240           ~ 530 1
63 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 394 0
64 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 247 0
65 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
66 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
67 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 344 0
68 PSR J1730-2304 Psr 17 30 21.68471 -23 04 31.2590           ~ 194 1
69 PSR J1732-5049 Psr 17 32 47.766068 -50 49 00.31465           ~ 87 0
70 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 285 0
71 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
72 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 420 0
73 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
74 PSR J1741+1351 Psr 17 41 31.1499024 +13 51 44.279709           ~ 122 0
75 PSR J1744-1134 Psr 17 44 29.4220844 -11 34 54.801320           ~ 323 1
76 PSR J1745+1017 Psr 17 45 33.8371 +10 17 52.523           ~ 70 0
77 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
78 PSR J1747-4036 Psr 17 47 48.715690 -40 36 54.79950           ~ 83 0
79 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
80 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
81 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
82 PSR J1805+0615 Psr 18 05 42.3999024 +06 15 18.359184           ~ 33 0
83 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 332 0
84 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
85 [HJK2000] GC01 GlC 18 08 21.8 -19 49 47           ~ 69 0
86 PSR J1811-2405 Psr 18 11 19.854352 -24 05 18.42800           ~ 56 1
87 PSR J1816+4510 Psr 18 16 35.9342957160 +45 10 33.917516328           ~ 126 0
88 GLIMPSE C02 GlC 18 18 30.5 -16 58 38           ~ 20 0
89 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
90 PSR J1824+1014 Psr 18 24 20.5004883 +10 16 29.555740           ~ 18 0
91 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
92 PSR J1832-0836 Psr 18 32 27.589497 -08 36 55.14540           ~ 86 0
93 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
94 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
95 PSR J1843-1113 Psr 18 43 41.260405 -11 13 31.10310           ~ 86 0
96 GLIMPSE C01 GlC 18 48 49.7 -01 29 50           ~ 60 0
97 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0
98 PSR J1855-1436 Psr 18 55 54.2285156 -14 36 08.999863           ~ 14 0
99 PSR J1901-0125 Psr 19 01 33.7280274 -01 25 29.276276           ~ 14 0
100 PSR J1902-5105 Psr 19 02 02.8476 -51 05 56.969           ~ 64 0
101 PSR J1903-7051 Psr 19 03 38.783931 -70 51 43.58175           ~ 39 0
102 PSR J1908+2105 Psr 19 09 32.0 +21 02 56           ~ 30 0
103 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
104 PSR J1921+0137 Psr 19 21 30.2856445 +01 37 22.800093           ~ 25 0
105 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
106 PSR J2006+0148 Psr 20 06 29.0405274 +01 48 54.000206           ~ 23 0
107 PSR J2017+0603 Psr 20 17 22.7048 +06 03 05.585           ~ 120 1
108 PSR J2017-1614 Psr 20 17 45.12 -16 18 21.1           ~ 40 1
109 PSR J2039-5617 Psr 20 39 34.9609502672 -56 17 09.033104197           ~ 84 0
110 PSR J2043+1711 Psr 20 43 20.8828 +17 11 28.941           ~ 129 1
111 V* LY Aqr Psr 20 51 07.52058 -08 27 37.6100           ~ 236 2
112 PSR J2052+1219 Psr 20 52 47.77844 +12 19 59.0281           ~ 42 0
113 PSR J2115+5448 Psr 21 15 11.7678 +54 48 45.154           ~ 30 0
114 PSR J2124-3358 Psr 21 24 43.834930 -33 58 45.49195           ~ 337 1
115 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
116 PSR J2214+3000 Psr 22 14 38.8480 +30 00 38.209           ~ 136 0
117 PSR J2215+51 Psr 22 15 32.6869149432 +51 35 36.400854912           ~ 176 0
118 PSR J2234+0944 Psr 22 34 46.856913 +09 44 30.04150           ~ 82 0
119 PSR J2241-5236 Psr 22 41 42.03161 -52 36 36.2492           ~ 143 1
120 PSR J2256-1024 Psr 22 56 56.390 -10 24 34.37           ~ 88 0
121 PSR J2302+4442 Psr 23 02 46.9789 +44 42 22.102           ~ 124 0
122 PSR J2310-0555 Psr 23 10 06.4379883 -05 55 36.084366           ~ 19 0
123 PSR J2339-0533 Psr 23 39 38.7412778376 -05 33 05.108592528     18.48     ~ 149 0

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