1996A&A...312...80J

Query : 1996A&A...312...80J

1996A&A...312...80J - Astronomy and Astrophysics, volume 31280-87 (1996/8-1)

The globular cluster population of low-luminosity X-ray sources.

JOHNSTON H.M. and VERBUNT F.

Abstract (from CDS):

More than thirty low-luminosity X-ray sources (with Lx≲1034.5erg/s) have now been discovered in globular clusters. The nature of these sources is still unclear. One important question is how the number of sources scales with cluster parameters such as central density or cluster mass. Because the detected sample is biased towards the brightest sources, such an analysis must rely on knowledge of the underlying luminosity function. We present here a statistical analysis of current observations of dim cluster X-ray sources. We determine the luminosity function to be dN/dL∝L–1.5, and find that the number of dim X-ray sources per cluster scales less steeply with core density than predicted by the two-body tidal capture model, just as do cluster pulsars.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: general - X-rays: general

Simbad objects: 35

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Number of rows : 35
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 Cl Pal 2 GlC 04 46 05.79720 +31 22 51.0170           ~ 202 0
3 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
4 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
5 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
6 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 327 0
7 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
8 RX J1342.1+2822 CV* 13 42 09.75 +28 22 47.5           Ss 38 1
9 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
10 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 485 0
11 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 441 0
12 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
13 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
14 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
15 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 406 1
16 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 394 0
17 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 247 0
18 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
19 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 425 0
20 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
21 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 344 0
22 NGC 6380 GlC 17 34 28.00 -39 04 09.0           ~ 175 0
23 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
24 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
25 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
26 Cl Terzan 6 GlC 17 50 47.02873 -31 16 29.6900           ~ 214 0
27 NGC 6496 GlC 17 59 03.68 -44 15 57.4   9.96       ~ 251 0
28 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 332 0
29 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
30 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
31 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
32 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
33 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 264 0
34 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
35 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0

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