2011ApJ...726..100H

Query : 2011ApJ...726..100H

2011ApJ...726..100H - Astrophys. J., 726, 100 (2011/January-2)

The fundamental plane of gamma-ray globular clusters.

HUI C.Y., CHENG K.S., WANG Y., TAM P.H.T., KONG A.K.H., CHERNYSHOV D.O. and DOGIEL V.A.

Abstract (from CDS):

We have investigated the properties of a group of γ-ray-emitting globular clusters (GCs) that have recently been uncovered in our Galaxy. By correlating the observed γ-ray luminosity Lγ with various cluster properties, we probe the origin of the high-energy photons from these GCs. We report that Lγ is positively correlated with the encounter rate Γc and the metallicity [Fe/H], which places an intimate link between the γ-ray emission and the millisecond-pulsar population. We also find a tendency that Lγ increases with the energy densities of the soft photon at the cluster location. Furthermore, the two-dimensional regression analysis suggests that Lγ, soft-photon densities, and Γc/[Fe/H] possibly span fundamental planes; this finding could potentially provide better predictions for the γ-ray properties of GCs.

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Journal keyword(s): gamma rays: stars - globular clusters: general - pulsars: general - stars: neutron

Simbad objects: 18

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Number of rows : 18
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 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
3 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
4 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
5 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 231 0
6 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 668 0
7 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
8 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
9 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
10 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
11 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
12 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
13 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
14 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
15 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
16 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
17 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
18 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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