Publications (114)
XMM-Newton high-resolution spectroscopy reveals the chemical evolution of M 87
N. Werner, H. Boehringer, J. S. Kaastra +3
We present here a study of chemical abundances in the giant elliptical galaxy M 87 using high-resolution spectra obtained with the Reflection Grating Spectrometers during two deep…
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…
Gas rotation and turbulence in the galaxy cluster Abell 2029
T. Bartalesi, A. Simionescu, S. Ettori +4
We constrain the rotation and turbulent support of the intracluster medium (ICM) in Abell 2029 (A2029), using dynamical equilibrium models and a combination of state-of-the-art X-r…
The thermodynamic structure and large-scale structure filament in MACS J0717.5+3745
J. P. Breuer, N. Werner, T. Plšek +12
We present the results of Chandra and XMM-Newton X-ray imaging and spatially resolved spectroscopy, as well as new MUSTANG2 90 GHz observations of the thermal Sunyaev-Zeldovich eff…
A uniform metallicity in the outskirts of massive, nearby galaxy clusters
O. Urban, N. Werner, S. W. Allen +2
Suzaku measurements of a homogeneous metal distribution of Solar in the outskirts of the nearby Perseus cluster suggest that chemical elements were deposited and mixed i…
Metal-mass-to-light ratios of the Perseus cluster out to the virial radius
K. Matsushita, E. Sakuma, T. Sasaki +2
We analyzed XMM-Newton data of the Perseus cluster out to 1 Mpc, or approximately half the virial radius. Using the flux ratios of Lyalpha lines of H-like Si and S to Kalpha…
The Planck clusters in the LOFAR sky: IV: LoTSS-DR2: statistics of radio halos and re-acceleration models
R. Cassano, V. Cuciti, G. Brunetti +16
Diffuse cluster-scale synchrotron radio emission is discovered in an increasing number of galaxy clusters in the form of radio halos (RHs), probing the presence of relativistic ele…
Chandra observations of the galaxy group AWM 5: cool core re-heating and thermal conduction suppression
A. Baldi, W. Forman, C. Jones +4
We present an analysis of a 40 ksec Chandra observation of the galaxy group AWM 5. It has a small ( kpc) dense cool core with a temperature of keV and the temperat…
The LOFAR sub-arcsecond view of the high-redshift radio relic in PSZ2G091.83+26.11
G. Di Gennaro, R. Timmerman, M. Hoeft +14
Enhanced inverse Compton (IC) losses at high redshift steepen diffuse radio spectra in galaxy clusters, making low-frequency (~100 MHz) observations favorable. However, low-frequen…
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…
The galaxy group NGC 507: newly detected AGN remnant plasma transported by sloshing
M. Brienza, L. Lovisari, K. Rajpurohit +15
Jets from active galactic nuclei (AGN) are known to recurrently enrich their surrounding medium with mildly-relativistic particles and magnetic fields. Here, we present a detailed…
Substructures associated with the sloshing cold front in the Perseus cluster
Y. Ichinohe, A. Simionescu, N. Werner +2
X-ray substructures in clusters of galaxies provide indirect clues about the microphysical properties of the intracluster medium (ICM), which are still not very well known. In orde…
Ripping Apart at the Seams: The Network of Stripped Gas Surrounding M86
S. Ehlert, N. Werner, A. Simionescu +4
We present a new study of the Virgo Cluster galaxies M86, M84, NGC 4338, and NGC 4438 using a mosaic of five separate pointings with XMM-Newton. Our observations allow for robust m…
Spectrally Resolved Gas Kinematics in Cygnus A: XRISM Detects AGN Jet-induced Velocity Dispersion in Multi-temperature Gas
Anwesh Majumder, T. Heckman, J. Meunier +8
We report spectral analysis on a 170 ks XRISM \textit{Resolve} exposure of the core of Cygnus A. Analyzing the full field of view spectrum in the keV band, we find evide…
The dynamical intracluster medium: a combined approach of observations and simulations
E. Roediger, M. Brueggen, A. Simionescu +2
Current high resolution observations of galaxy clusters reveal a dynamical intracluster medium (ICM). The wealth of structures includes signatures of interactions between active ga…
The beautiful mess in Abell 2255
A. Botteon, G. Brunetti, R. J. van Weeren +18
We present LOFAR observations of one of the most spectacular objects in the radio sky: Abell 2255. This is a nearby () merging galaxy cluster hosting one of the first r…
X-ray exploration of the outskirts of the nearby Centaurus cluster using Suzaku and Chandra
S. A. Walker, A. C. Fabian, J. S. Sanders +2
We present Suzaku observations of the Centaurus cluster out to 0.95r200, taken along a strip to the north west. We have also used congruent Chandra observations of the outskirts to…
The Coma cluster at LOFAR frequencies II: the halo, relic, and a new accretion relic
A. Bonafede, G. Brunetti, L. Rudnick +26
We present LOw Frequency ARray observations of the Coma cluster field at 144\,MHz. The cluster hosts one of the most famous radio halos, a relic, and a low surface-brightness bridg…
How do atomic code uncertainties affect abundance measurements in the intracluster medium?
F. Mernier, N. Werner, K. Lakhchaura +6
Accurate chemical abundance measurements of X-ray emitting atmospheres pervading massive galaxies, galaxy groups, and clusters provide essential information on the star formation a…
ALMA observation of the disruption of molecular gas in M87
A. Simionescu, G. Tremblay, N. Werner +3
We present the results from ALMA observations centred (3 kpc in projection) southeast of the nucleus of M87. We report the detection of extended CO (2-1) line e…
A Uniform Contribution of Core-Collapse and Type Ia Supernovae to the Chemical Enrichment Pattern in the Outskirts of the Virgo Cluster
A. Simionescu, N. Werner, O. Urban +3
We present the first measurements of the abundances of -elements (Mg, Si, and S) extending out to beyond the virial radius of a cluster of galaxies. Our results, based on Suzak…
Evidence for a merger-revived radio phoenix in MaxBCG J217.95869+13.53470
G. A. Ogrean, M. Brueggen, R. van Weeren +3
We use XMM-Newton observations of the galaxy cluster MaxBCG J217.95869+13.53470 to analyze its physical properties and dynamical state. MaxBCG J217.95869+13.53470 is found at a red…
The Planck clusters in the LOFAR sky V. LoTSS-DR2: Mass - radio halo power correlation at low frequency
V. Cuciti, R. Cassano, M. Sereno +17
Many galaxy clusters show diffuse cluster-scale emission in the form of radio halos, showing that magnetic fields and relativistic electrons are mixed in with the intra-cluster med…
A snapshot of the oldest AGN feedback phases
M. Brienza, T. W. Shimwell, F. de Gasperin +19
Active Galactic Nuclei (AGN) inject large amounts of energy into their host galaxies and surrounding environment, shaping their properties and evolution. In particular, AGN jets in…
The origin of cold gas in giant elliptical galaxies and its role in fueling radio-mode AGN feedback
N. Werner, J. B. R. Oonk, M. Sun +12
We present a multi-wavelength study of the interstellar medium in eight nearby, X-ray and optically bright, giant elliptical galaxies. Using Herschel PACS, we map the cold gas in t…
Witnessing the Growth of the Nearest Galaxy Cluster: Thermodynamics of the Virgo Cluster Outskirts
A. Simionescu, N. Werner, A. Mantz +2
We present results from Suzaku Key Project observations of the Virgo Cluster, the nearest galaxy cluster to us, mapping its X-ray properties along four long `arms' extending beyond…
The cycle of metals in the infalling elliptical galaxy NGC 1404
F. Mernier, N. Werner, Y. Su +6
Hot atmospheres pervading galaxy clusters, groups, and early-type galaxies are rich in metals, produced during epochs and diffused via processes that are still to be determined. Wh…
Large-scale Motions in the Perseus Galaxy Cluster
A. Simionescu, N. Werner, O. Urban +6
By combining large-scale mosaics of ROSAT PSPC, XMM-Newton, and Suzaku X-ray observations, we present evidence for large-scale motions in the intracluster medium of the nearby, X-r…
Central galaxy growth and feedback in the most massive nearby cool core cluster
G. A. Ogrean, N. A. Hatch, A. Simionescu +4
We present multi-wavelength observations of the centre of RXCJ1504.1-0248 - the galaxy cluster with the most luminous and relatively nearby cool core at z~0.2. Although there are s…
On the Merging Cluster Abell 578 and Its Central Radio Galaxy 4C +67.13
K. Hagino, L. Stawarz, A. Siemiginowska +7
Here we analyze radio, optical, and X-ray data for a peculiar cluster Abell 578. This cluster is not fully relaxed and consists of two merging sub-systems. The brightest cluster ga…
Constraints on the Chemical Enrichment History of the Perseus Cluster of Galaxies from High-Resolution X-ray Spectroscopy
A. Simionescu, S. Nakashima, H. Yamaguchi +32
High-resolution spectroscopy of the core of the Perseus Cluster of galaxies, using the satellite above 2 keV and the - Reflection Grating Spectrometer at lowe…
Deep Chandra study of the truncated cool core of the Ophiuchus cluster
N. Werner, I. Zhuravleva, R. E. A. Canning +7
We present the results of a deep (280 ks) Chandra observation of the Ophiuchus cluster, the second-brightest galaxy cluster in the X-ray sky. The cluster hosts a truncated cool cor…
Abell 1033: birth of a radio phoenix
F. de Gasperin, G. A. Ogrean, R. J. van Weeren +4
Extended steep-spectrum radio emission in a galaxy cluster is usually associated with a recent merger. However, given the complex scenario of galaxy cluster mergers, many of the di…
Azimuthally Resolved X-Ray Spectroscopy to the Edge of the Perseus Cluster
O. Urban, A. Simionescu, N. Werner +9
We present the results from extensive, new observations of the Perseus Cluster of galaxies, obtained as a Suzaku Key Project. The 85 pointings analyzed span eight azimuthal directi…
The large-scale shock in the cluster of galaxies Hydra A
A. Simionescu, E. Roediger, P. E. J. Nulsen +5
We analyzed a deep XMM-Newton observation of the cluster of galaxies Hydra A, focusing on the large-scale shock discovered as a surface brightness discontinuity in Chandra images.…
Shocks and Cavities from Multiple Outbursts in the Galaxy Group NGC 5813: A Window to AGN Feedback
S. W. Randall, W. R. Forman, S. Giacintucci +10
We present results from new Chandra, GMRT, and SOAR observations of NGC 5813, the dominant central galaxy in a nearby galaxy group. The system shows three pairs of collinear caviti…
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…
Simulating Astro-H Observations of Sloshing Gas Motions in the Cores of Galaxy Clusters
J. ZuHone, E. Miller, A. Simionescu +1
Astro-H will be the first X-ray observatory to employ a high-resolution microcalorimeter, capable of measuring the shift and width of individual spectral lines to the precision nec…
Diffuse radio emission from non-Planck galaxy clusters in the LoTSS-DR2 fields
D. N. Hoang, M. Brüggen, A. Botteon +17
The presence of large-scale magnetic fields and ultra-relativistic electrons in the intra-cluster medium (ICM) is confirmed through the detection of diffuse radio synchrotron sourc…
The gaseous atmosphere of M87 seen with XMM-Newton
A. Simionescu, H. Böhringer, M. Brüggen +1
M87 is a key object whose study can reveal the complex phenomena in cooling cores. We use a deep XMM-Newton observation of M87 to produce detailed temperature, pressure and entropy…
Cold fronts and multi-temperature structures in the core of Abell 2052
J. de Plaa, N. Werner, A. Simionescu +3
The physics of the coolest phases in the hot Intra-Cluster Medium (ICM) of clusters of galaxies is yet to be fully unveiled. X-ray cavities blown by the central Active Galactic Nuc…
Feedback under the microscope II: heating, gas uplift, and mixing in the nearest cluster core
N. Werner, A. Simionescu, E. T. Million +11
Using a combination of deep 574ks Chandra data, XMM-Newton high-resolution spectra, and optical Halpha+NII images, we study the nature and spatial distribution of the multiphase pl…
The X-ray coronae of the two brightest galaxies in the Coma cluster
J. S. Sanders, A. C. Fabian, M. Sun +4
We use deep Chandra X-ray Observatory observations to examine the coronae of the two brightest cluster galaxies in the Coma cluster of galaxies, NGC 4874 and NGC 4889. We find that…
On the Interaction of the PKS B1358-113 Radio Galaxy with the Abell 1836 Cluster
L. Stawarz, A. Szostek, C. C. Cheung +9
[abridged] Here we present the analysis of multifrequency data gathered for the FRII radio galaxy PKS B1358-113, hosted in the brightest cluster galaxy of Abell 1836. The galaxy ha…
An azimuthally resolved study of the cold front in Abell 3667
Y. Ichinohe, A. Simionescu, N. Werner +1
The microphysical properties, such as effective viscosity and conductivity, of the weakly magnetized intergalactic plasma are not yet well known. We investigate the constraints tha…
Linear Structures in the Core of the Coma Cluster of Galaxies
J. S. Sanders, A. C. Fabian, E. Churazov +4
The hot X-ray emitting plasma in galaxy clusters is predicted to have turbulent motions which can contribute around ten percent of the cluster's central energy density. We report d…
Metal-rich multi-phase gas in M87: AGN-driven metal transport, magnetic-field supported multi-temperature gas, and constraints on non-thermal emission observed with XMM-Newton
A. Simionescu, N. Werner, A. Finoguenov +2
We use deep (~120 ks) XMM-Newton data of the M87 halo to analyze its spatially resolved temperature structure and chemical composition. We focus particularly on the regions of enha…
The nature of filamentary cold gas in the core of the Virgo Cluster
N. Werner, J. B. R. Oonk, R. E. A. Canning +10
We present a multi-wavelength study of the emission-line nebulae located southeast of the nucleus of M87, the central dominant galaxy of the Virgo Cluster. We report the detection…
Constraints on turbulent pressure in the X-ray halos of giant elliptical galaxies from resonant scattering
N. Werner, I. Zhuravleva, E. Churazov +5
The dense cores of X-ray emitting gaseous halos of large elliptical galaxies with temperatures below about 0.8 keV show two prominent Fe XVII emission features, which provide a sen…
Non-thermal filaments and AGN recurrent activity in the galaxy group Nest200047: a LOFAR, uGMRT, MeerKAT, VLA radio spectral analysis
M. Brienza, K. Rajpurohit, E. Churazov +15
Nest200047 is a clear example of multiple radio bubbles from an Active Galactic Nucleus (AGN) in a galaxy group, featuring non-thermal filaments likely shaped by buoyancy, gas moti…
The Chemical and Thermal Structure of the Hot Atmosphere of the Elliptical Galaxy NGC 5813
D. Chatzigiannakis, A. Simionescu, F. Mernier
We present a robust representation of the chemical and thermal structure in the galaxy group NGC 5813 using archival, deep X-ray observations, and employing a multi-temperature spe…
Properties of gas clumps and gas clumping factor in the intra cluster medium
F. Vazza, D. Eckert, A. Simionescu +2
The spatial distribution of gas matter inside galaxy clusters is not completely smooth, but may host gas clumps associated with substructures. These overdense gas substructures are…
Unveiling the Galaxy Cluster - Cosmic Web Connection with X-ray observations in the Next Decade
Stephen A. Walker, Daisuke Nagai, A. Simionescu +35
In recent years, the outskirts of galaxy clusters have emerged as one of the new frontiers and unique laboratories for studying the growth of large scale structure in the universe.…
Simulations of magnetic fields in filaments
M. Bruggen, M. Ruszkowski, A. Simionescu +2
The intergalactic magnetic field within filaments should be less polluted by magnetised outflows from active galaxies than magnetic fields in clusters. Therefore, filaments may be…
X-ray observations of the merging cluster CIZA J2242.8+5301
G. A. Ogrean, M. Brüggen, A. Simionescu +4
Multiwavelength studies of radio relics at merger shocks set powerful constraints on the relics origin and formation mechanism. However, for X-ray observations, a main difficulty i…
Are X-ray Atmospheres Heated by Turbulent Dissipation? XRISM Constraints
B. R. McNamara, A. C. Fabian, H. R. Russell +5
We evaluate whether dissipation of turbulence injected into hot cluster atmospheres by jets and bubbles can offset radiative cooling flows. No trends are found between atmospheric…
The nature and energetics of AGN-driven perturbations in the hot gas in the Perseus Cluster
I. Zhuravleva, E. Churazov, P. Arevalo +7
Cores of relaxed galaxy clusters are often disturbed by AGN. Their Chandra observations revealed a wealth of structures induced by shocks, subsonic gas motions, bubbles of relativi…
Detection of hot gas in the filament connecting the clusters of galaxies Abell 222 and Abell 223
N. Werner, A. Finoguenov, J. S. Kaastra +4
About half of the baryons in the local Universe are invisible and - according to simulations - their dominant fraction resides in filaments connecting clusters of galaxies in the f…
The Planck clusters in the LOFAR sky VI. LoTSS-DR2: Properties of radio relics
A. Jones, F. de Gasperin, V. Cuciti +19
Context. It is well-established that shock waves in the intracluster medium launched by galaxy cluster mergers can produce synchrotron emission, which is visible to us at radio fre…
ClG 0217+70: A massive merging galaxy cluster with a large radio halo and relics
X. Zhang, A. Simionescu, J. S. Kaastra +7
We present an analysis of archival Chandra data of the merging galaxy cluster ClG 0217+70. The Fe XXV He X-ray emission line is clearly visible in the 25 ks observation, allowi…
Constraining Gas Motions in the Intra-Cluster Medium
A. Simionescu, J. ZuHone, I. Zhuravleva +9
The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM) remains one of the last missing key ingredients in understanding the microphysical properti…
Discovery of inverse-Compton X-ray emission and estimate of the volume-averaged magnetic field in a galaxy group
F. Mernier, N. Werner, J. Bagchi +6
Observed in a significant fraction of clusters and groups of galaxies, diffuse radio synchrotron emission reveals the presence of relativistic electrons and magnetic fields permeat…
Substructures in the core of Abell 2319
Y. Ichinohe, A. Simionescu, N. Werner +2
We analysed the deep archival Chandra observations of the high-temperature galaxy cluster Abell 2319 to investigate the prominent cold front in its core. The main sharp arc of the…
Multiple density discontinuities in the merging galaxy cluster CIZA J2242.8+5301
G. A. Ogrean, M. Brüggen, R. J. van Weeren +4
CIZA J2242.8+5301, a merging galaxy cluster at z=0.19, hosts a double-relic system and a faint radio halo. Radio observations at frequencies ranging from a few MHz to several GHz h…
Decoding the thermal history of the merging cluster Cygnus A
Anwesh Majumder, M. W. Wise, A. Simionescu +1
We report on a detailed spatial and spectral analysis of the large-scale X-ray emission from the merging cluster Cygnus A. We use 2.2 Ms Chandra and 40 ks XMM-Newton archival datas…
Giant Lobes of Centaurus A Radio Galaxy Observed with the Suzaku X-ray Satellite
L. Stawarz, Y. T. Tanaka, G. Madejski +15
[abridged] We report on Suzaku observations of selected regions within the Southern giant lobe of the radio galaxy Centaurus A. We focus on distinct X-ray features likely associate…
Shock heating by FR I radio sources in galaxy clusters
M. Brueggen, S. Heinz, E. Roediger +2
Feedback by active galactic nuclei (AGN) is frequently invoked to explain the cut-off of the galaxy luminosity function at the bright end and the absence of cooling flows in galaxy…
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…
On the thermodynamic self-similarity of the nearest, most relaxed, giant ellipticals
N. Werner, S. W. Allen, A. Simionescu
We present detailed spatially resolved measurements of the thermodynamic properties of the X-ray emitting gas in the inner regions of the five nearest, X-ray and optically brightes…
ICM Signatures from Multiple Outbursts in the Galaxy Group NGC 5813: A Window to AGN Feedback
S. W. Randall, W. R. Forman, S. Giacintucci +10
We present results from Chandra observations of NGC 5813, the dominant central galaxy in a nearby galaxy group. We focus on three main results. 1) The diffuse gas shows clear signa…
Deep Chandra observations of merging galaxy cluster ZwCl 2341+0000
X. Zhang, A. Simionescu, C. Stuardi +9
Knowledge of X-ray shock and radio relic connection in merging galaxy clusters has been greatly extended in terms of both observation and theory over the last decade. ZwCl 2341+000…
Gas Density Fluctuations in the Perseus Cluster: Clumping Factor and Velocity Power Spectrum
I. Zhuravleva, E. Churazov, P. Arevalo +9
X-ray surface brightness fluctuations in the core of the Perseus Cluster are analyzed, using deep observations with the Chandra observatory. The amplitude of gas density fluctuatio…
CHEERS: The chemical evolution RGS sample
J. de Plaa, J. S. Kaastra, N. Werner +17
The chemical yields of supernovae and the metal enrichment of the hot intra-cluster medium (ICM) are not well understood. This paper introduces the CHEmical Enrichment RGS Sample (…
A Very Deep Chandra Observation of the Galaxy Group NGC 5813: AGN Shocks, Feedback, and Outburst History
S. W. Randall, P. E. J. Nulsen, C. Jones +11
We present results from a very deep (650 ks) Chandra X-ray observation of the galaxy group NGC~5813, the deepest Chandra observation of a galaxy group to date. Earlier observations…
The diffuse radio emission in the high-redshift cluster PSZ2 G091.83+26.11: total intensity and polarisation analysis with Very Large Array 1-4 GHz observations
G. Di Gennaro, M. Brüggen, R. J. van Weeren +8
We present the peculiar case of PSZ2G091.83+26.11 at z=0.822. This cluster hosts a Mpc-scale radio halo and an elongated radio source, whose location with the respect to the intrac…
A combined X-ray, optical and radio view of the merging galaxy cluster MACS J0417.5-1154
M. B. Pandge, R. Monteiro-Oliveira, J. Bagchi +3
We present a comprehensive multi-wavelength analysis of the merging galaxy cluster MACS~J0417.5-1154 at a redshift of , using available images red obtained with \chandra\ i…
Digging for red nuggets: discovery of hot halos surrounding massive, compact, relic galaxies
N. Werner, K. Lakhchaura, R. E. A. Canning +2
We present the results of Chandra X-ray observations of the isolated, massive, compact, relic galaxies MRK 1216 and PGC 032873. Compact massive galaxies observed at z>2, also calle…
X-ray Spectroscopy of the Virgo Cluster out to the Virial Radius
O. Urban, N. Werner, A. Simionescu +2
We present results from the analysis of a mosaic of thirteen XMM-Newton pointings covering the Virgo Cluster from its center northwards out to a radius r~1.2 Mpc (~4.5 degrees), re…
Feedback under the microscope: thermodynamic structure and AGN driven shocks in M87
E. T. Million, N. Werner, A. Simionescu +5
(abridged) Using a deep Chandra exposure (574 ks), we present high-resolution thermodynamic maps created from the spectra of 16,000 independent regions, each with 1,000…
The Planck clusters in the LOFAR sky. III. LoTSS-DR2: Dynamic states and density fluctuations of the intracluster medium
X. Zhang, A. Simionescu, F. Gastaldello +19
The footprint of LoTSS-DR2 covers 309 PSZ2 galaxy clusters, 83 of which host a radio halo and 26 host a radio relic(s). It provides us an excellent opportunity to statistically stu…
Metal transport by gas sloshing in M87
A. Simionescu, N. Werner, W. R. Forman +5
We present the results of an XMM-Newton mosaic covering the central ~200 kpc of the nearby Virgo cluster. We focus on a strong surface brightness discontinuity in the outskirts of…
A 3.5 Mpc-long radio relic in the galaxy cluster ClG 0217+70
D. N. Hoang, X. Zhang, C. Stuardi +14
Mega-parsec scale radio sources in the form of halos and relics are often detected in dynamically disturbed galaxy clusters. Although they are associated with merger-induced turbul…
XRISM detection of the 6.4 keV Fe K line in the radio galaxy Cygnus A
Anwesh Majumder, T. Heckman, L. Gu +7
We detail the spectral analysis of a 170 ks XRISM Resolve observation of the core of Cygnus A. The high spectral resolution of Resolve have enabled us to probe the inner accretion…
Core-collapse supernova enrichment in the core of the Virgo Cluster
E. T. Million, N. Werner, A. Simionescu +1
Using a deep (574 ks) Chandra observation of M87, the dominant galaxy of the nearby Virgo Cluster, we present the best measurements to date of the radial distribution of metals in…
X-ray investigation of the remarkable galaxy group Nest200047
Anwesh Majumder, A. Simionescu, T. Plšek +11
Galaxy groups are more susceptible to feedback from the central active galactic nuclei (AGN) due to their lower gravitational binding energy compared to clusters. This makes them i…
No Shock Across Part of a Radio Relic in the Merging Galaxy Cluster ZwCl 2341.1+0000?
G. A. Ogrean, M. Brueggen, R. J. van Weeren +2
The galaxy cluster ZwCl 2341.1+0000 is a merging system at z=0.27, which hosts two radio relics and a central, faint, filamentary radio structure. The two radio relics have unusual…
Indications of an offset merger in Abell 3667
Y. Omiya, K. Nakazawa, T. Tamura +13
Abell 3667 is a nearby merging cluster with a prominent cold front and a pair of two bright radio relics. Assuming a head-on merger, the origin of the cold front is often considere…
Suzaku observations of a shock front tracing the western edge of the giant radio halo in the Coma Cluster
Y. Uchida, A. Simionescu, T. Takahashi +5
We present the results of new Suzaku observations of the Coma Cluster, the X-ray brightest, nearby, merging system hosting a well studied, typical giant radio halo. It has been pre…
Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky
N. Werner, J. A. ZuHone, I. Zhuravleva +9
We present the results of a very deep (500 ks) Chandra observation, along with tailored numerical simulations, of the nearest, best resolved cluster cold front in the sky, which li…
Gas Motions in Hydra-A: XRISM Constraints on ICM Kinematics Across Jet-Inflated Cavities
Anwesh Majumder, B. R. McNamara, P. E. J. Nulsen +8
We report on two deep XRISM observations of the central and northern regions of Hydra-A's X-ray atmosphere covering the bubbles inflated by jets from the central galaxy's active ga…
Voyage through the Hidden Physics of the Cosmic Web
A. Simionescu, S. Ettori, N. Werner +27
The majority of the ordinary matter in the local Universe has been heated by strong structure formation shocks and resides in a largely unexplored hot, diffuse, X-ray emitting plas…
The Plasma Universe: A Coherent Science Theme for Voyage 2050
D. Verscharen, R. T. Wicks, G. Branduardi-Raymont +13
In review of the White Papers from the Voyage 2050 process and after the public presentation of a number of these papers in October 2019 in Madrid, we as White Paper lead authors h…
Resonant scattering in the Perseus Cluster: spectral model for constraining gas motions with Astro-H
I. Zhuravleva, E. Churazov, R. Sunyaev +6
X-ray spectra from cores of galaxy clusters can be strongly distorted by resonant scattering of line photons, affecting metal abundance and gas velocity measurements. We introduce…
The Coma cluster at LOFAR frequencies I: insights into particle acceleration mechanisms in the radio bridge
A. Bonafede, G. Brunetti, F. Vazza +18
Radio synchrotron emission from the bridges of low-density gas connecting galaxy clusters and groups is a challenge for particle acceleration processes. In this work, we analyse th…
Dynamics of AGN feedback in the X-ray bright East and Southwest arms of M87, mapped by XRISM
A. Simionescu, C. Kilbourne, H. R. Russell +24
As the central galaxy in the nearest cluster, M87 provides the best spatial resolution for disentangling the complex interactions between AGN jets and the surrounding environment.…
Thermodynamics of the Coma Cluster Outskirts
A. Simionescu, N. Werner, O. Urban +10
We present results from a large mosaic of Suzaku observations of the Coma Cluster, the nearest and X-ray brightest hot, dynamically active, non-cool core system, focusing on the th…
LOFAR, VLA, and Chandra observations of the Toothbrush galaxy cluster
R. J. van Weeren, G. Brunetti, M. Brüggen +39
We present deep LOFAR observations between 120-181 MHz of the "Toothbrush" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known. Our LOFAR obse…
Turbulent Heating in Galaxy Clusters Brightest in X-rays
I. Zhuravleva, E. Churazov, A. A. Schekochihin +9
The hot, X-ray-emitting intracluster medium (ICM) is the dominant baryonic constituent of clusters of galaxies. In the cores of many clusters, radiative energy losses from the ICM…
ASTRO-H White Paper - Clusters of Galaxies and Related Science
T. Kitayama, M. Bautz, M. Markevitch +22
The next generation X-ray observatory ASTRO-H will open up a new dimension in the study of galaxy clusters by achieving for the first time the spectral resolution required to measu…
A Suzaku Search for Dark Matter Emission Lines in the X-ray Brightest Galaxy Clusters
O. Urban, N. Werner, S. W. Allen +3
We present the results of a search for unidentified emission lines in deep Suzaku X-ray spectra for the central regions of the four X-ray brightest galaxy clusters: Perseus, Coma,…