2003ApJ...590..207P


Query : 2003ApJ...590..207P

2003ApJ...590..207P - Astrophys. J., 590, 207-224 (2003/June-2)

High-resolution X-ray spectroscopic constraints on cooling-flow models for clusters of galaxies.

PETERSON J.R., KAHN S.M., PAERELS F.B.S., KAASTRA J.S., TAMURA T., BLEEKER J.A.M., FERRIGNO C. and JERNIGAN J.G.

Abstract (from CDS):

We present high-resolution X-ray spectra of 14 putative cooling-flow clusters of galaxies obtained with the Reflection Grating Spectrometer on XMM-Newton. The clusters in the sample span a large range of temperatures and mass deposition rates. Various of these spectra exhibit line emission from O VIII, Ne X, Mg XII and XI, Al XIII and XII, Si XIV and XIII, N VII, and C VI as well as all Fe L ions. The spectra exhibit strong emission from cool plasma at just below the ambient temperature, T0, down to T0/2, but also exhibit a severe deficit of emission relative to the predictions of the isobaric cooling-flow model at lower temperatures (<T0/3). In addition, the best-resolved spectra show emission throughout the entire X-ray temperature range, but increasingly less emission at lower temperatures than the cooling-flow model would predict. These results are difficult to reconcile with simple prescriptions for distorting the emission measure distribution, e.g., by including additional heating or rapid cooling terms. We enumerate some theoretical difficulties in understanding the soft X-ray spectra of cooling flows independent of the classic problem of the failure to detect the cooling-flow sink. Empirically, the differential luminosity distribution is consistent with being proportional to the temperature to the power of ~1-2, instead of being independent of the temperature, as expected in the standard multiphase model. The primary differences in the observed low-temperature spectra are ascribed to differences in the ambient temperature.

Abstract Copyright:

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Abundances - Galaxies: Clusters: General - Galaxies: Intergalactic Medium - Methods: Data Analysis - X-Rays: Galaxies: Clusters

Simbad objects: 19

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Number of rows : 19
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 533 Group GrG 01 25 29.1 +01 48 17           ~ 57 0
2 NGC 533 GiG 01 25 31.4074984248 +01 45 33.236656812   13.1 14.11     ~ 220 0
3 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 682 1
4 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 367 1
5 ACO 496 ClG 04 33 30.3838 -13 14 21.584           ~ 678 2
6 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1165 0
7 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 427 0
8 ACO 780 ClG 09 18 30 -12 15.7           ~ 446 0
9 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 808 0
10 NAME Virgo A Cluster ClG 12 30.8 +12 23           ~ 130 0
11 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 558 0
12 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1091 1
13 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1220 0
14 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 669 1
15 ACO 1837 ClG 14 01 36.2 -11 07 48           ~ 102 0
16 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 709 1
17 BAX 230.4583+07.7089 ClG 15 21 50.7 +07 42 18     15.13     ~ 302 0
18 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 251 1
19 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 373 1

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2023.01.28-11:48:47

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