2001ApJ...557L.105F

Query : 2001ApJ...557L.105F

2001ApJ...557L.105F - Astrophys. J., 557, L105-L108 (2001/August-3)

Detection of ionized gas in the globular cluster 47 Tucanae.

FREIRE P.C., KRAMER M., LYNE A.G., CAMILO F., MANCHESTER R.N. and D'AMICO N.

Abstract (from CDS):

We report the detection of ionized intracluster gas in the globular cluster 47 Tucanae. Pulsars in this cluster with a negative period derivative, which must lie in the distant half of the cluster, have significantly higher measured integrated electron column densities than the pulsars with a positive period derivative. We derive the plasma density within the central few parsecs of the cluster using two different methods that yield consistent values. Our best estimate of ne=0.067±0.015 cm–3 is about 100 times the free electron density of the interstellar medium in the vicinity of 47 Tucanae, and the ionized gas is probably the dominant component of the intracluster medium.

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Journal keyword(s): Galaxy: Globular Clusters: Individual: Name: 47 Tucanae - Stars: Pulsars: General

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 PSR J0024-7204C Psr 00 23 50.371 -72 04 31.44           ~ 65 1
2 PSR J0024-7204M Psr 00 23 54.489 -72 05 30.83           ~ 41 1
3 PSR J0023-7203J Psr 00 23 59.40735 -72 03 58.7914           ~ 91 1
4 PSR J0024-72L Psr 00 24 03.754 -72 04 56.87           ~ 42 1
5 PSR J0024-72F Psr 00 24 03.907 -72 04 42.47           ~ 54 1
6 PSR J0023-72O Psr 00 24 04.637 -72 04 53.71           ~ 66 1
7 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
8 PSR J0024-72H Psr 00 24 06.686 -72 04 06.74           ~ 64 1
9 PSR B0021-72I Psr 00 24 07.9330 -72 04 39.669           ~ 68 1
10 PSR J0024-72G Psr 00 24 07.943 -72 04 39.65           ~ 47 1
11 PSR B0021-72T Psr 00 24 08.54 -72 04 38.9           ~ 48 1
12 PSR B0021-72N Psr 00 24 09.193 -72 04 28.83           ~ 40 1
13 PSR J0023-72U Psr 00 24 09.8325 -72 03 59.667           ~ 64 2
14 PSR J0024-7204E Psr 00 24 11.125 -72 05 20.14           ~ 66 1
15 PSR J0024-72D Psr 00 24 13.818 -72 04 43.83           ~ 62 1
16 PSR J0023-72Q Psr 00 24 16.482 -72 04 25.15           ~ 44 1
17 M 56 GlC 19 16 35.57 +30 11 00.5           ~ 455 0
18 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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