2018ApJ...858...33C


Query : 2018ApJ...858...33C

2018ApJ...858...33C - Astrophys. J., 858, 33-33 (2018/May-1)

A Chandra survey of Milky Way globular clusters. I. Emissivity and abundance of weak X-ray sources.

CHENG Z., LI Z., XU X. and LI X.

Abstract (from CDS):

Based on archival Chandra data, we have carried out an X-ray survey of 69, or nearly half the known population of, Milky Way globular clusters (GCs), focusing on weak X-ray sources, mainly cataclysmic variables (CVs) and coronally active binaries (ABs). Using the cumulative X-ray luminosity per unit stellar mass (i.e., X-ray emissivity) as a proxy of the source abundance, we demonstrate a paucity (lower by 41% ± 27% on average) of weak X-ray sources in most GCs relative to the field, which is represented by the Solar Neighborhood and Local Group dwarf elliptical galaxies. We also revisit the mutual correlations among the cumulative X-ray luminosity (LX), cluster mass (M), and stellar encounter rate (Γ), finding LX∝M^0.74±0.13^, LX∝Γ^0.67±0.07^ and Γ∝M^1.28±0.17^. The three quantities can further be expressed as LX∝M^0.64±0.12^ Γ^0.19±0.07^, which indicates that the dynamical formation of CVs and ABs through stellar encounters in GCs is less dominant than previously suggested, and that the primordial formation channel has a substantial contribution. Taking these aspects together, we suggest that a large fraction of primordial, soft binaries have been disrupted in binary-single or binary-binary stellar interactions before they could otherwise evolve into X-ray-emitting close binaries, whereas the same interactions also have led to the formation of new close binaries. No significant correlations between LX/LK and cluster properties, including dynamical age, metallicity, and structural parameters, are found.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - globular clusters: general - novae, cataclysmic variables - X-rays: binaries

Simbad objects: 78

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Number of rows : 78
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3740 0
2 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 662 1
3 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 772 1
4 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1268 1
5 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2095 2
6 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11895 1
7 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 988 0
8 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1016 0
9 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 766 0
10 NGC 2682 OpC 08 51 23 +11 48.8           ~ 2191 0
11 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1340 0
12 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 801 0
13 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 776 0
14 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3253 0
15 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2378 0
16 NGC 5286 GlC 13 46 26.81 -51 22 27.3   9.18 8.31     ~ 405 0
17 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 379 0
18 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1880 0
19 NGC 5927 GlC 15 28 00.69 -50 40 22.9   10.13 8.86     ~ 432 0
20 NGC 5946 GlC 15 35 28.58 -50 39 35.0   11.98 10.72     ~ 179 0
21 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 671 0
22 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1766 0
23 NGC 6144 GlC 16 27 13.86 -26 01 24.6   10.55 9.63     ~ 224 0
24 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 195 0
25 ESO 390-6 GlC 16 28 40.10 -35 21 13.0     12.0     ~ 88 0
26 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2108 0
27 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 627 0
28 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 137 0
29 M 62 GlC 17 01 12.60 -30 06 44.5   8.55 7.39     ~ 564 0
30 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 209 0
31 NGC 6293 GlC 17 10 10.42 -26 34 54.2   9.96 9.02     ~ 259 0
32 NGC 6304 GlC 17 14 32.25 -29 27 43.3   10.33 9.03     ~ 330 0
33 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2001 0
34 NGC 6325 GlC 17 17 59.27 -23 45 57.7   11.49       ~ 159 0
35 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 297 0
36 NGC 6342 GlC 17 21 10.14 -19 35 14.7   11.25 10.01     ~ 267 0
37 NGC 6355 GlC 17 23 58.65 -26 21 12.3   12.46 11.05     ~ 141 0
38 NGC 6352 GlC 17 25 29.11 -48 25 19.8   9.95 8.87     ~ 369 0
39 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 285 0
40 NGC 6362 GlC 17 31 54.99 -67 02 54.0   9.72 8.86     ~ 537 0
41 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 223 0
42 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 865 1
43 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 350 0
44 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 153 0
45 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1886 1
46 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13100 0
47 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 766 1
48 NGC 6440 GlC 17 48 52.67 -20 21 34.5   12.01 10.10     ~ 508 1
49 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 151 0
50 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 108 0
51 NGC 6517 GlC 18 01 50.376 -08 57 34.39   11.08       ~ 161 0
52 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 497 1
53 NGC 6535 GlC 18 03 50.51 -00 17 51.5   11.35 9.85     ~ 269 0
54 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 500 0
55 NGC 6539 GlC 18 04 49.74 -07 35 09.1           ~ 208 0
56 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 267 0
57 NGC 6541 GlC 18 08 02.36 -43 42 53.6   8.06 7.32     ~ 348 1
58 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 574 0
59 NGC 6558 GlC 18 10 18.38 -31 45 48.6   12.39 11.29     ~ 208 0
60 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 216 0
61 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 720 0
62 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 216 0
63 M 69 GlC 18 31 23.10 -32 20 53.1   9.32 8.31     ~ 438 1
64 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 183 0
65 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1300 0
66 M 70 GlC 18 43 12.76 -32 17 31.6   9.76 9.06     ~ 355 0
67 GLIMPSE C01 GlC 18 48 49.7 -01 29 50           ~ 45 0
68 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1003 0
69 NGC 6717 GlC 18 55 06.04 -22 42 05.3   11.29 10.35     ~ 222 0
70 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1904 0
71 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 220 0
72 GCl 111 GlC 19 18 02.10 +18 34 18.0           ~ 98 0
73 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 810 0
74 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1076 0
75 M 72 GlC 20 53 27.70 -12 32 14.3   9.95 8.96     ~ 394 0
76 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 968 1
77 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 983 0
78 NAME Local Group GrG ~ ~           ~ 7726 0

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2022.08.18-03:15:12

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