2001A&A...365L..67A

Query : 2001A&A...365L..67A

2001A&A...365L..67A - Astronomy and Astrophysics, volume 365, L67-73 (2001/1-1)

XMM-Newton observation of the Coma Galaxy cluster. The temperature structure in the central region.

ARNAUD M., AGHANIM N., GASTAUD R., NEUMANN D.M., LUMB D., BRIEL U., ALTIERI B., GHIZZARDI S., MITTAZ J., SASSEEN T.P. and VESTRAND W.T.

Abstract (from CDS):

We present a temperature map and a temperature profile of the central part (r <20' or 1/4 virial radius) of the Coma cluster. We combined 5 overlapping pointings made with XMM/EPIC/MOS and extracted spectra in boxes of 3.5'x3.5'. The temperature distribution around the two central galaxies is remarkably homogeneous (r<10'), contrary to previous ASCA results, suggesting that the core is actually in a relaxed state. At larger distance from the cluster center we do see evidence for recent matter accretion. We confirm the cool area in the direction of NGC 4921, probably due to gas stripped from an infalling group. We find indications of a hot front in the South West, in the direction of NGC 4839, probably due to an adiabatic compression.

Abstract Copyright: ∼

Journal keyword(s): galaxies: intergalactic medium - Cosmology: observations - Cosmology: dark matter - large-scale structure of the Universe - X-rays: general Cosmology:

Simbad objects: 9

Full paper

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Number of rows : 9

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	NAME NGC 4839 Group	GrG	12 57 21.5	+27 31 54						~	79	0
2	NGC 4839	rG	12 57 24.3563164776	+27 29 52.203087132	13.56	13.02	12.06			~	456	3
3	NGC 4874	LIN	12 59 35.7093764280	+27 57 33.293892204	13.01	13.7	11.40	12.122	11.386	~	769	3
4	ACO 1656	ClG	12 59 48.7	+27 58 50						~	4650	2
5	NGC 4889	EmG	13 00 08.097	+27 58 37.29	12.93	13.0	11.30	11.652	10.906	~	690	1
6	NGC 4911	LIN	13 00 56.0616749160	+27 47 27.152821212	14.58	13.7	13.33	12.601	12.068	~	201	0
7	NGC 4921	LIN	13 01 26.1222244152	+27 53 09.629006748		13.7				~	197	0
8	PB 3223	Sy1	13 01 28.1471465160	+27 51 06.685754040		18.32	17.91			~	28	0
9	NGC 4991	rG	13 09 15.112	+02 20 51.57		15.5				~	16	0

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