2000ApJ...541..542M

Query : 2000ApJ...541..542M

2000ApJ...541..542M - Astrophys. J., 541, 542-549 (2000/October-1)

Chandra observation of Abell 2142: survival of dense subcluster cores in a merger.

MARKEVITCH M., PONMAN T.J., NULSEN P.E.J., BAUTZ M.W., BURKE D.J., DAVID L.P., DAVIS D., DONNELLY R.H., FORMAN W.R., JONES C., KAASTRA J., KELLOGG E., KIM D.-W., KOLODZIEJCZAK J., MAZZOTTA P., PAGLIARO A., PATEL S., VAN SPEYBROECK L., VIKHLININ A., VRTILEK J., WISE M. and ZHAO P.

Abstract (from CDS):

We use Chandra data to map the gas temperature in the central region of the merging cluster A2142. The cluster is markedly nonisothermal; it appears that the central cooling flow has been disturbed but not destroyed by a merger. The X-ray image exhibits two sharp, bow-shaped, shocklike surface brightness edges or gas density discontinuities. However, temperature and pressure profiles across these edges indicate that these are not shock fronts. The pressure is reasonably continuous across these edges, while the entropy jumps in the opposite sense to that in a shock (i.e., the denser side of the edge has lower temperature, and hence lower entropy). Most plausibly, these edges delineate the dense subcluster cores that have survived a merger and ram pressure stripping by the surrounding shock-heated gas.

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Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Clusters: Individual: Name: Abell 2142 - Galaxies: Intergalactic Medium - X-Rays: General

CDS comments: G1 = [OHF95] ACO 2142 201, G2 = [OHF95] ACO 2142 219

Simbad objects: 4

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Number of rows : 4
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 2MASX J15581330+2714531 BiC 15 58 13.2945664080 +27 14 53.232436860   16.62       ~ 20 0
2 2MASX J15582002+2714000 BiC 15 58 20.000 +27 14 00.28   14.48       ~ 40 1
3 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
4 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 676 1

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