| MERNIER, F., J. DE PLAA, Norbert WERNER, J.S. KAASTRA, A.J.J. RAASSEN, L. GU, J. MAO, I. URDAMPILLETA, N. TRUONG a A. SIMIONESCU. Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies. Monthly Notices of the Royal Astronomical Society. MALDEN: WILEY, 2018, roč. 478, č. 1, s. "L116"-"L121", 6 s. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnrasl/sly080. |
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@article{1481318,
author = {Mernier, F. and de Plaa, J. and Werner, Norbert and Kaastra, J.S. and Raassen, A.J.J. and Gu, L. and Mao, J. and Urdampilleta, I. and Truong, N. and Simionescu, A.},
article_location = {MALDEN},
article_number = {1},
doi = {http://dx.doi.org/10.1093/mnrasl/sly080},
keywords = {galaxies: clusters: intracluster medium; X-rays: galaxies: clusters; X-rays: galaxies},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies},
url = {https://academic.oup.com/mnrasl/article/478/1/L116/4993253},
volume = {478},
year = {2018}
}
TY - JOUR
ID - 1481318
AU - Mernier, F. - de Plaa, J. - Werner, Norbert - Kaastra, J.S. - Raassen, A.J.J. - Gu, L. - Mao, J. - Urdampilleta, I. - Truong, N. - Simionescu, A.
PY - 2018
TI - Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies
JF - Monthly Notices of the Royal Astronomical Society
VL - 478
IS - 1
SP - "L116"-"L121"
EP - "L116"-"L121"
PB - WILEY
SN - 00358711
KW - galaxies: clusters: intracluster medium
KW - X-rays: galaxies: clusters
KW - X-rays: galaxies
UR - https://academic.oup.com/mnrasl/article/478/1/L116/4993253
N2 - X-ray measurements find systematically lower Fe abundances in the X-ray emitting haloes pervading groups (kT less than or similar to 1.7 keV) than in clusters of galaxies. These results have been difficult to reconcile with theoretical predictions. However, models using incomplete atomic data or the assumption of isothermal plasmas may have biased the best-fitting Fe abundance in groups and giant elliptical galaxies low. In this work, we take advantage of a major update of the atomic code in the spectral fitting package SPEX to re-evaluate the Fe abundance in 43 clusters, groups, and elliptical galaxies (the CHEERS sample) in a self-consistent analysis and within a common radius of 0.1r(500). For the first time, we report a remarkably similar average Fe enrichment in all these systems. Unlike previous results, this strongly suggests that metals are synthesized and transported in these haloes with the same average efficiency across two orders of magnitude in total mass. We show that the previous metallicity measurements in low-temperature systems were biased low due to incomplete atomic data in the spectral fitting codes. The reasons for such a code-related Fe bias, also implying previously unconsidered biases in the emission measure and temperature structure, are discussed.
ER -
MERNIER, F., J. DE PLAA, Norbert WERNER, J.S. KAASTRA, A.J.J. RAASSEN, L. GU, J. MAO, I. URDAMPILLETA, N. TRUONG a A. SIMIONESCU. Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies. \textit{Monthly Notices of the Royal Astronomical Society}. MALDEN: WILEY, 2018, roč.~478, č.~1, s.~''L116''-''L121'', 6 s. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnrasl/sly080.
|
