2003NewA....8..517A


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.22CET21:25:43

2003NewA....8..517A - New Astronomy, 8, 517-528 (2003/August-0)

Dark matter profiles in clusters of galaxies: a phenomenological approach.

ARIELI Y. and REPHAELI Y.

Abstract (from CDS):

There are some basic differences between the observed properties of galaxies and clusters and the predictions from current hydrodynamical simulations. These are particularly pronounced in the central regions of galaxies and clusters. The popular NFW (Navarro, Frenk and White) profile, for example, predicts a density cusp at the center, a behavior that (unsurprisingly) has not been observed. While it is not fully clear what are the reasons for this discrepancy, it perhaps reflects (at least partly) insufficient spatial resolution of the simulations. In this paper we explore a purely phenomenological approach to determine dark matter density profiles that are more consistent with observational results. Specifically, we deduce the gas density distribution from measured X-ray brightness profiles, and substitute it in the hydrostatic equilibrium equation in order to derive the form of dark matter profiles. Given some basic theoretical requirements from a dark matter profile, wet! hen consider a number of simple profiles that have the desired asymptotic form. We conclude that a dark matter profile of the form rho=rho01+r/ra-3 is most consistent with current observational results.

Abstract Copyright:

Journal keyword(s): Dark matter - Galaxies: clusters: general - X-rays: galaxies: clusters

Simbad objects: 25

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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 523 0
2 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 291 1
3 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 474 0
4 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 387 0
5 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 88 0
6 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 158 0
7 2MASX J07473129-1917403 BiC 07 47 31.296 -19 17 40.34   19.60       ~ 394 1
8 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 365 0
9 ACO 644 ClG 08 17 24.5 -07 30 46           ~ 204 0
10 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 917 1
11 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 384 0
12 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 276 0
13 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4300 2
14 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 264 0
15 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 350 0
16 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 867 0
17 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 523 0
18 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 403 0
19 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 782 1
20 ACO 2244 ClG 17 02 34.01 +34 04 41.1           ~ 247 0
21 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 507 0
22 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 419 1
23 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 572 1
24 ACO 3888 ClG 22 34 23.0 -37 43 29           ~ 126 1
25 ACO 2507 ClG 22 57 06.1 +05 33 49           ~ 35 0

    Equat.    Gal    SGal    Ecl

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2021.01.22-21:25:44

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