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27 April 2024 |
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Fossil Group Origins. VI. Global X-ray scaling relations of fossil galaxy clusters | | A. Kundert
; F. Gastaldello
; E. D'Onghia
; M. Girardi
; J. A. L. Aguerri
; R. Barrena
; E. M. Corsini
; S. De Grandi
; E. Jiménez-Bailón
; M. Lozada-Muñoz
; J. Méndez-Abreu
; R. Sánchez-Janssen
; E. Wilcots
; S. Zarattini
; | | Date: |
20 Mar 2015 | | Abstract: | We present the first pointed X-ray observations of ten candidate fossil
galaxy groups and clusters. With these Suzaku observations, we determine global
temperatures and bolometric X-ray luminosities of the intracluster medium (ICM)
out to $r_{500}$ for six systems in our sample. The remaining four systems show
signs of significant contamination from non-ICM sources. For the six objects
with successfully determined $r_{500}$ properties, we measure global
temperatures between $2.8 mathrm{keV} leq T_{mathrm{X}} leq 5.3
mathrm{keV}$, bolometric X-ray luminosities of $0.6 imes 10^{44}
mathrm{ergs} mathrm{s}^{-1} leq L_{mathrm{X,bol}} leq 7.2 imes 10^{44}
mathrm{ergs} mathrm{s}^{-1}$, and estimate masses, as derived from
$T_{mathrm{X}}$, of $M_{500} gtrsim 10^{14} mathrm{M}_{odot}$. Scaling
relations are constructed for an assembled sample of fossil and non-fossil
systems using global X-ray luminosities, temperatures, optical luminosities,
and velocity dispersions. The fit of the scaling relations for fossil systems
is found to be consistent with the fit of the relations for normal groups and
clusters. We find fossil systems have global ICM X-ray properties similar to
those of comparable mass non-fossil systems. | | Source: | arXiv, 1503.6219 | | Services: | Forum | Review | PDF | Favorites | |
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