2010A&A...516A..34L


Query : 2010A&A...516A..34L

2010A&A...516A..34L - Astronomy and Astrophysics, volume 516, A34-34 (2010/6-2)

Probing the astrophysics of cluster outskirts.

LAPI A., FUSCO-FEMIANO R. and CAVALIERE A.

Abstract (from CDS):

In galaxy clusters the entropy distribution of the intracluster plasma (ICP) modulates the latter's equilibrium within the dark matter gravitational wells, as rendered by our supermodel. We argue the entropy production at the boundary shocks to be reduced or terminated as the accretion rates of DM and intergalactic gas peter out; this behavior is enforced by the slowdown in the outskirt development at late times, when the dark energy dominates the cosmology while the outer wings of the initial perturbation drive the growth. For these conditions, we predict the ICP temperature profiles to steepen into the cluster outskirts. The detailed expectations from our simple formalism agree with the X-ray data concerning five clusters whose temperature profiles have been recently measured out to the virial radius. We predict steep temperature declines to prevail in clusters at low z, tempered only by rich environs including adjacent filamentary structures.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - X-rays: galaxies: clusters - methods: analytical

Simbad objects: 6

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Number of rows : 6
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 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 368 0
2 2MASX J07473129-1917403 BiC 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 403 1
3 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 412 0
4 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1094 0
5 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1221 0
6 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 423 0

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2023.02.04-01:02:56

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