2002MNRAS.334..323C

Query : 2002MNRAS.334..323C

2002MNRAS.334..323C - Mon. Not. R. Astron. Soc., 334, 323-326 (2002/August-1)

Observations of the Sunyaev-Zel'dovich effect in the z =0.78 cluster MS 1137.5+6625.

COTTER G., BUTTERY H.J., DAS R., JONES M.E., GRAINGE K., POOLEY G.G. and SAUNDERS R.

Abstract (from CDS):

We have observed the z =0.78 cluster MS 1137.5+6625 with the Ryle Telescope (RT) at 15GHz. After subtraction of contaminating radio sources in the field, we find a Sunyaev-Zel'dovich flux decrement of -421±60µJy on the ~0.65k λ baseline of the RT, spatially coincident with the optical and X-ray positions for the cluster core.

For a spherical King-profile cluster model, the best fit to our flux measurement has a core radius θC=20arcsec, consistent with previous X-ray observations, and a central temperature decrement ΔT =650±92µK.

Using this model, we calculate that the cluster has a gas mass inside a {formmu4} radius of 2.9x1013 M☉ for an ΩM=1 universe and 1.6x1013M☉ for ΩM=0.3, ΩΛ=0.7. We compare this model with existing measurements of the total mass of the cluster, based on gravitational lensing, and estimate a gas fraction for MS 1137.5+6625 of ~8 per cent.


Abstract Copyright: 2002 Blackwell Science Ltd

Journal keyword(s): galaxies: clusters: individual: MS 1137.5+6625 - cosmology: observations

Nomenclature: Table 1: [CBD2002] JHHMMSS.sss+DDMMSS.ss N=4.

Simbad objects: 7

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Number of rows : 7
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 ICRF J113957.0+654749 Sy1 11 39 57.0254367168 +65 47 49.483232880   16.50 16.32     ~ 528 1
3 [CBD2002] J114000.547+654751.60 Rad 11 40 00.547 +65 47 51.60           ~ 1 0
4 [CBD2002] J114010.260+660710.57 Rad 11 40 10.260 +66 07 10.57           ~ 1 0
5 [CBD2002] J114022.302+660849.94 Rad 11 40 22.302 +66 08 49.94           ~ 1 0
6 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 141 0
7 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2

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