Efraín Gatuzz
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View article: Bridging observations and simulations: a machine learning approach to galaxy clusters
Bridging observations and simulations: a machine learning approach to galaxy clusters Open
The intracluster medium (ICM) records the history of galaxy clusters through its complex dynamical properties. To effectively interpret these properties, robust methods are needed to compare observational data with theoretical models. We p…
View article: The SRG/eROSITA all-sky survey
The SRG/eROSITA all-sky survey Open
The properties of the warm-hot intergalactic medium (WHIM) in cosmic filaments are among the least quantified units in modern astrophysics. The Spectrum Roentgen Gamma/eROSITA All Sky Survey (SRG/eRASS) provides a unique opportunity to stu…
View article: The SRG/eROSITA diffuse soft X-ray background
The SRG/eROSITA diffuse soft X-ray background Open
Context . The SRG/eROSITA All-Sky Surveys (eRASSs) combine the advantages of complete sky coverage and the energy resolution provided by the charge couple device and offer the most holistic and detailed view of the diffuse soft X-ray backg…
View article: Argon X-ray absorption in the local interstellar medium
Argon X-ray absorption in the local interstellar medium Open
We present the first comprehensive analysis of the argon K-edge absorption region (3.1–4.2 Å) using high-resolution HETGS Chandra spectra of 33 low-mass X-ray binaries. Utilizing R-matrix theory, we computed new K photoabsorption cross sec…
View article: SRG/eROSITA 3D mapping of the interstellar medium using X-ray absorption spectroscopy
SRG/eROSITA 3D mapping of the interstellar medium using X-ray absorption spectroscopy Open
We present a detailed study of the hydrogen density distribution in the local interstellar medium (ISM) using the X-ray absorption technique. Hydrogen column densities were precisely measured by fitting X-ray spectra from coronal sources o…
View article: The SRG/eROSITA All-Sky Survey
The SRG/eROSITA All-Sky Survey Open
Context. As the closest galaxy cluster, the Virgo Cluster is an exemplary environment for the study of the large-scale filamentary structure and physical effects that are present in cluster outskirts but absent from the more easily studied…
View article: The SRG/eROSITA all-sky survey. X-ray emission from the warm-hot phase gas in long cosmic filaments
The SRG/eROSITA all-sky survey. X-ray emission from the warm-hot phase gas in long cosmic filaments Open
The properties of the warm-hot intergalactic medium (WHIM) in cosmic filaments are among the least quantified units in modern astrophysics. The Spectrum Roentgen Gamma/eROSITA All Sky Survey ((SRG/eRASS) provides a unique opportunity to st…
View article: High-resolution X-Ray Spectroscopy of Interstellar Iron toward Cygnus X-1 and GX 339-4
High-resolution X-Ray Spectroscopy of Interstellar Iron toward Cygnus X-1 and GX 339-4 Open
We present a high-resolution spectral study of Fe L -shell extinction by the diffuse interstellar medium (ISM) in the direction of the X-ray binaries Cygnus X-1 and GX 339–4, using the XMM-Newton reflection grating spectrometer. The majori…
View article: The SRG/eROSITA All-Sky Survey
The SRG/eROSITA All-Sky Survey Open
Superclusters of galaxies mark the large-scale overdense regions in the Universe. Superclusters provide an ideal environment to study structure formation and to search for the emission of the intergalactic medium such as cosmic filaments a…
View article: The SRG/eROSITA All-Sky Survey: First catalog of superclusters in the western Galactic hemisphere
The SRG/eROSITA All-Sky Survey: First catalog of superclusters in the western Galactic hemisphere Open
Superclusters of galaxies mark the large-scale overdense regions in the Universe. Superclusters provide an ideal environment to study structure formation and to search for the emission of the intergalactic medium such as cosmic filaments a…
View article: Probing the physical properties of the intergalactic medium using SRG/eROSITA spectra from blazars
Probing the physical properties of the intergalactic medium using SRG/eROSITA spectra from blazars Open
Most baryonic matter resides in the intergalactic medium (IGM). This diffuse gas is primarily composed of ionized hydrogen and helium and fills the space between galaxies. Observations of this environment are crucial for better understandi…
View article: The SRG/eROSITA all-sky survey
The SRG/eROSITA all-sky survey Open
The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying the sky in December 2019, with the aim of producing all-sky X-ray source lists and sky maps of an unprecedented depth. Here we present catalogue…
View article: The SRG/eROSITA All-Sky Survey: View of the Virgo Cluster
The SRG/eROSITA All-Sky Survey: View of the Virgo Cluster Open
As the closest galaxy cluster, the Virgo Cluster is an exemplary environment for the study of the large-scale filamentary structure and physical effects that are present in cluster outskirts but absent from the more easily studied inner re…
View article: The eROSITA view of the Abell 3391/95 field
The eROSITA view of the Abell 3391/95 field Open
Context . About 30% – 40% of the baryons in the local Universe remain unobserved. Many of these "missing" baryons are expected to reside in the warm-hot intergalactic medium (WHIM) of the cosmic web filaments that connect clusters of galax…
View article: The eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments
The eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments Open
Aims. We aim to characterize the gas properties in the cluster outskirts ($R_{500}R_{200}$) of the A3391/95 system and to compare them to predictions. Methods. We performed X-ray image and spectral analyses using the eROSITA PV data to ass…
View article: Sulphur X-ray absorption in the local ISM
Sulphur X-ray absorption in the local ISM Open
We present a study S K-edge using high-resolution HETGS Chandra spectra of 36 low-mass X-ray binaries. For each source, we have estimated column densities for S i, S ii, S iii, S xiv, S xv, and S xvi ionic species, which trace the neutral,…
View article: Sulfur X-ray absorption in the local ISM
Sulfur X-ray absorption in the local ISM Open
We present a study S K-edge using high-resolution HETGS {\it Chandra} spectra of 36 low-mas X-ray binaries. For each source, we have estimated column densities for {\rm S}~{\sc i}, {\rm S}~{\sc ii}, {\rm S}~{\sc iii}, {\rm S}~{\sc xiv}, {\…
View article: Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles
Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles Open
The analysis of the elemental abundances in galaxy clusters offers valuable insights into the formation and evolution of galaxies. In this study, we explore the chemical enrichment of the intracluster medium in the Ophiuchus cluster by uti…
View article: Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles
Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles Open
The analysis of the elemental abundances in galaxy clusters offers valuable insights into the formation and evolution of galaxies. In this study, we explore the chemical enrichment of the intergalactic medium (ICM) in the Ophiuchus cluster…
View article: Chemical enrichment of ICM within the Centaurus cluster – I. Radial profiles
Chemical enrichment of ICM within the Centaurus cluster – I. Radial profiles Open
We examine deep XMM–Newton European Photon Imaging Camera pn observations of the Centaurus cluster to study the hot intracluster medium (ICM) and radial metal distributions within such an environment. We found that the best-fitting spectra…
View article: Chemical enrichment of ICM within the Centaurus cluster I: radial profiles
Chemical enrichment of ICM within the Centaurus cluster I: radial profiles Open
We examine deep {\it XMM-Newton} EPIC-pn observations of the Centaurus cluster to study the hot intracluster medium (ICM) and radial metal distributions within such an environment. We found that the best-fit spectral model corresponds to a…
View article: Measuring the hot ICM velocity structure function using <i>XMM–Newton</i> observations
Measuring the hot ICM velocity structure function using <i>XMM–Newton</i> observations Open
It has been shown that the gas velocities within the intracluster medium (ICM) can be measured by applying the novel XMM–Newton EPIC-pn energy scale calibration, which uses instrumental Cu Kα as reference for the line emission. Using this …
View article: Measuring the hot ICM velocity structure function using XMM-Newton observations
Measuring the hot ICM velocity structure function using XMM-Newton observations Open
It has been shown that the gas velocities within the intracluster medium (ICM) can be measured by applying novel XMM-Newton EPIC-pn energy scale calibration, which uses instrumental Cu Ka as reference for the line emission. Using this tech…
View article: Measuring the ICM velocity structure in the Ophiuchus cluster
Measuring the ICM velocity structure in the Ophiuchus cluster Open
We have found evidence of bulk velocities following active galactic nucleus (AGN) bubbles in the Virgo cluster and galaxy motions in the Centaurus cluster. In order to increase the sample and improve our understanding of the intracluster m…
View article: Searching for the warm-hot intergalactic medium using XMM-Newton high-resolution X-ray spectra
Searching for the warm-hot intergalactic medium using XMM-Newton high-resolution X-ray spectra Open
The problem of missing baryons in the local universe remains an open question. One propose alternative is that at low redshift missing baryons are in the form of the Warm Hot Intergalactic Medium (WHIM). In order to test this idea, we pres…
View article: Chemical enrichment of the ICM within the virgo cluster – I. Radial profiles
Chemical enrichment of the ICM within the virgo cluster – I. Radial profiles Open
We present a detailed analysis of the elemental abundances distribution of the Virgo cluster using XMM–Newton observations. We included in the analysis a new EPIC-pn energy scale calibration which allow us to measure velocities with uncert…
View article: Chemical enrichment of the ICM within the Virgo cluster I: radial profiles
Chemical enrichment of the ICM within the Virgo cluster I: radial profiles Open
We present a detailed analysis of the elemental abundances distribution of the Virgo cluster using {\it XMM-Newton} observations. We included in the analysis a new EPIC-pn energy scale calibration which allow us to measure velocities with …
View article: X-ray analysis of JWST’s first galaxy cluster lens SMACS J0723.3−7327
X-ray analysis of JWST’s first galaxy cluster lens SMACS J0723.3−7327 Open
Context. SMACS J0723.3−7327 is the first galaxy cluster lens observed by James Webb Space Telescope (JWST). Based on its early release observation data, several groups have reported the results on strong lensing analysis and mass distribut…
View article: Line Emission Mapper (LEM): Probing the physics of cosmic ecosystems
Line Emission Mapper (LEM): Probing the physics of cosmic ecosystems Open
The Line Emission Mapper (LEM) is an X-ray Probe for the 2030s that will answer the outstanding questions of the Universe's structure formation. It will also provide transformative new observing capabilities for every area of astrophysics,…
View article: The velocity structure of the intracluster medium of the Centaurus cluster
The velocity structure of the intracluster medium of the Centaurus cluster Open
There are few direct measurements of the intracluster medium (ICM) velocity structure, despite its importance for understanding clusters. We present a detailed analysis of the velocity structure of the Centaurus cluster using XMM–Newton ob…