2007A&A...465..345D


Query : 2007A&A...465..345D

2007A&A...465..345D - Astronomy and Astrophysics, volume 465, 345-355 (2007/4-2)

Constraining supernova models using the hot gas in clusters of galaxies.

DE PLAA J., WERNER N., BLEEKER J.A.M., VINK J., KAASTRA J.S. and MENDEZ M.

Abstract (from CDS):

The hot X-ray emitting gas in clusters of galaxies is a very large repository of metals produced by supernovae. During the evolution of clusters, billions of supernovae eject their material into this Intra-Cluster Medium (ICM). We aim to accurately measure the abundances in the ICM of many clusters and compare these data with metal yields produced by supernovae. With accurate abundances determined using this cluster sample we will be able to constrain supernova explosion mechanisms. Using the data archive of the XMM-Newton X-ray observatory, we compile a sample of 22 clusters. We fit spectra extracted from the core regions and determine the abundances of silicon, sulfur, argon, calcium, iron, and nickel. The abundances from the spectral fits are subsequently fitted to supernova yields determined from several supernova type Ia and core-collapse supernova models. We find that the argon and calcium abundances cannot be fitted with currently favoured supernova type Ia models. We obtain a major improvement of the fit, when we use an empirically modified delayed-detonation model that is calibrated on the Tycho supernova remnant. The two modified parameters are the density where the sound wave in the supernova turns into a shock and the ratio of the specific internal energies of ions and electrons at the shock. Our fits also suggest that the core-collapse supernovae that contributed to the enrichment of the ICM had progenitors which were already enriched. The Ar/Ca ratio in clusters is a good touchstone for determining the quality of type Ia models. The core-collapse contribution, which is about 50% and not strongly dependent on the IMF or progenitor metallicity, does not have a significant impact on the Ar/Ca ratio. The number ratio between supernova type Ia and core-collapse supernovae suggests that binary systems in the appropriate mass range are very efficient (∼5-16%) in eventually forming supernova type Ia explosions.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies: clusters - galaxies: clusters: general - intergalactic medium - galaxies: abundances - supernovae: general - nuclear reactions, nucleosynthesis, abundances

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1135 1
2 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 844 0
3 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 351 1
4 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 298 1
5 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 358 1
6 ACO 3530 ClG 12 55 36 -30 21.2           ~ 93 0
7 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 278 0
8 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1072 0
9 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 421 2
10 ACO 3560 ClG 13 32 23.7 -33 08 21           ~ 126 1
11 ACO 1775 ClG 13 41 55.6 +26 21 53           ~ 285 0
12 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1205 0
13 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 174 3
14 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 896 0
15 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 703 1
16 NAME NGC 5920 Group ClG 15 21 50.7 +07 42 18     15.13     ~ 296 0
17 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1131 1
18 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 415 0
19 ACO 3827 ClG 22 01 49.1 -59 57 15           ~ 144 0
20 ACO 3888 ClG 22 34 23.0 -37 43 29           ~ 130 1
21 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 243 1
22 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 305 1
23 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 368 1

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2022.08.09-04:40:47

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