121 citations · 530 across the 21 of their papers we have counts for
22 papers
XRISM Observations of Abell 1795: Evidence for Low Turbulence and Resonant Scattering
Arnab Sarkar, Eric D. Miller, Brian McNamara +10
We present high-resolution X-ray spectroscopic observations of the cool-core galaxy cluster Abell~1795 obtained with XRISM/Resolve. The cluster was observed with two deep pointings…
High-resolution X-ray spectroscopy with XRISM/Resolve reveals super-Solar abundance ratios in Virgo/M87
J. Martin, A. Simionescu, F. Mernier +26
The chemical composition of the intracluster medium (ICM) provides key insights into the enrichment history of galaxy clusters. However, high-resolution abundance measurements with…
Probable Detection of a Cooler Gas Component in the Perseus Cluster with XRISM
Julian Meunier, Brian R. McNamara, Aurora Simionescu +36
We present an analysis of the temperature structure of the Perseus cluster atmosphere using XRISM Resolve observations. The average temperature rises from 3.3 keV near the nucleus…
Resonant scattering at the center of the galaxy cluster PKS 0745-191 with XRISM
Keita Tanaka, Megan Eckart, Kotaro Fukushima +11
We report evidence for the resonant scattering effect at the center of the galaxy cluster PKS 0745-191 with XRISM. We analyzed XRISM/Resolve commissioning-phase observations of the…
Chemical composition and enrichment of the Centaurus cluster core seen by XRISM/Resolve
F. Mernier, K. Fukushima, A. Simionescu +16
Hot, X-ray emitting atmospheres pervading galaxy clusters are rich in metals, which have been synthesised and released by asymptotic giant branch (AGB) stars, core-collapse superno…
Mapping the Perseus Galaxy Cluster with XRISM: Gas Kinematic Features and their Implications for Turbulence
Congyao Zhang, Irina Zhuravleva, Annie Heinrich +19
In this paper, we present extended gas kinematic maps of the Perseus cluster by combining five new XRISM/Resolve pointings observed in 2025 with four Performance Verification datas…
XRISM Observations of The Prototypical Cold Front in Abell 3667
Yuki Omiya, Yuto Ichinohe, Kazuhiro Nakazawa +13
We present high-resolution X-ray spectroscopy of the merging galaxy cluster Abell 3667 with \textit{XRISM}/Resolve. Two observations, targeting the cluster X-ray core and the proto…
Extreme AGN feedback in the fossil galaxy group SDSSTG 4436
D. Eckert, F. Gastaldello, L. Lovisari +20
Supermassive black hole feedback is the currently favoured mechanism to regulate the star formation rate of galaxies and prevent the formation of ultra-massive galaxies ($M_\star>1…
Exploring chemical enrichment of the intracluster medium with the Line Emission Mapper
François Mernier, Yuanyuan Su, Maxim Markevitch +27
Synthesized in the cores of stars and supernovae, most metals disperse over cosmic scales and are ultimately deposited well outside the gravitational potential of their host galaxi…
Expanding on the Fundamental Metallicity Relation in Dwarf Galaxies with MUSE
Teodora-Elena Bulichi, Katja Fahrion, François Mernier +10
The mass-metallicity relation (MZR) represents one of the most important scaling relations in the context of galaxy evolution, comprising a positive correlation between stellar mas…
Chemical abundances in the outskirts of nearby galaxy groups measured with joint Suzaku and Chandra observations
Arnab Sarkar, Yuanyuan Su, Nhut Truong +5
We report results from deep Suzaku and mostly snapshot Chandra observations of four nearby galaxy groups: MKW4, Antlia, RXJ1159+5531, and ESO3060170. Their peak temperatures vary o…
Chemical enrichment in groups and clusters
François Mernier, Veronica Biffi
As building blocks of dust, rocky planets, and even complex life, the chemical elements heavier than hydrogen (H) and helium (He) - called "metals" in astronomy - play an essential…
Hot atmospheres of galaxies, groups, and clusters of galaxies
Norbert Werner, François Mernier
Most of the ordinary matter in the local Universe has not been converted into stars but resides in a largely unexplored diffuse, hot, X-ray emitting plasma. It pervades the gravita…
Iron abundance distribution in the hot gas of merging galaxy clusters
I. Urdampilleta, F. Mernier, J. S. Kaastra +4
We present XMM-Newton/EPIC observations of six merging galaxy clusters and study the distributions of their temperature, iron (Fe) abundance and pseudo-entropy along the merging ax…
Possible depletion of metals into dust grains in the core of the Centaurus cluster of galaxies
K. Lakhchaura, F. Mernier, N. Werner
We present azimuthally averaged metal abundance profiles from a full, comprehensive, and conservative re-analysis of the deep (800 ks total net exposure) \textit{Chandra}/ACI…
Solar chemical composition in the hot gas of cool-core ellipticals, groups, and clusters of galaxies
François Mernier, Norbert Werner, Jelle de Plaa +6
The hot intracluster medium (ICM) pervading galaxy clusters and groups is rich in metals, which were synthesised by billions of supernovae and have accumulated in cluster gravitati…
Mass-Metallicity Relation from Cosmological Hydrodynamical Simulations and X-ray Observations of Galaxy Groups and Clusters
Nhut Truong, Elena Rasia, Veronica Biffi +7
Recent X-ray observations of galaxy clusters show that the distribution of intra-cluster medium (ICM) metallicity is remarkably uniform in space and time. In this paper, we analyse…
Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies
François Mernier, Jelle de Plaa, Norbert Werner +7
X-ray measurements find systematically lower Fe abundances in the X-ray emitting haloes pervading groups ( keV) than in clusters of galaxies. These results have been…
Radial metal abundance profiles in the intra-cluster medium of cool-core galaxy clusters, groups, and ellipticals
François Mernier, Jelle de Plaa, Jelle S. Kaastra +10
The hot intra-cluster medium (ICM) permeating galaxy clusters and groups is not pristine, as it is continuously enriched by metals synthesised in Type Ia (SNIa) and core-collapse (…
Origin of central abundances in the hot intra-cluster medium - II. Chemical enrichment and supernova yield models
François Mernier, Jelle de Plaa, Ciro Pinto +7
The hot intra-cluster medium (ICM) is rich in metals, which are synthesised by supernovae (SNe) and accumulate over time into the deep gravitational potential well of clusters of g…
Abundance and temperature distributions in the hot intra-cluster gas of Abell 4059
François Mernier, Jelle de Plaa, Lorenzo Lovisari +5
Using the EPIC and RGS data from a deep (~200 ks) XMM-Newton observation, we investigate the temperature structure (kT and sigma_T ) and the abundances of 9 elements (O, Ne, Mg, Si…
The growth of the galaxy cluster Abell 85: mergers, shocks, stripping and seeding of clumping
Y. Ichinohe, N. Werner, A. Simionescu +5
We present the results of deep Chandra, XMM-Newton and Suzaku observations of the nearby galaxy cluster Abell 85, which is currently undergoing at least two mergers, and in additio…