Publications (24)
Sulfur X-ray absorption in the local ISM
Efrain Gatuzz, T. W. Gorczyca, M. F. Hasoglu +3
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},…
Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles
Efrain Gatuzz, J. S. Sanders, K. Dennerl +6
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…
The eROSITA view of the Abell 3391/95 field: The Northern Clump. The largest infalling structure in the longest known gas filament observed with eROSITA, XMM-Newton, and Chandra
Angie Veronica, Yuanyuan Su, Veronica Biffi +18
SRG/eROSITA PV observations revealed the A3391/95 cluster system and the Northern Clump (MCXC J0621.7-5242 galaxy cluster) are aligning along a cosmic filament in soft X-rays, simi…
Nitrogen X-ray absorption in the local ISM
Efrain Gatuzz, Javier A. GarcÃa, Timothy R. Kallman
Nitrogen is one of the most abundant metals in the interstellar medium (ISM), and thus it constitutes an excellent test to study a variety of astrophysical environments, ranging fr…
Astro 2020: Astromineralogy of interstellar dust with X-ray spectroscopy
Lia Corrales, Lynne Valencic, Elisa Costantini +16
X-ray absorption fine structure (XAFS) in the 0.2-2 keV band is a crucial component in multi-wavelength studies of dust mineralogy, size, and shape -- parameters that are necessary…
XRISM spectroscopy of a crowded Galactic center region -- II. Narrow emission lines in the Black Hole candidate MAXI J1744-294/Swift J174540.2-290037
Maxime Parra, Shifra Mandel, Kai Matsunaga +13
Narrow, highly ionized X-ray emission lines in black hole low-mass X-ray binaries (BH-LMXBs) are rare and have been observed in only a few sources, during unusual, heavily obscured…
XRISM spectroscopy of a crowded Galactic center region -- III. S, Ar and Ca ISM Absorption Features in the spectrum of MAXI J1744-294
Efrain Gatuzz, Maxime Parra, Muhammet F. Hasoglu +7
We present a comprehensive study of X-ray absorption by sulfur (S), argon (Ar), and calcium (Ca) in the interstellar medium (ISM) along the line of sight to the low-mass X-ray bina…
High-Resolution X-Ray Spectroscopy of Interstellar Iron Toward Cygnus X-1 and GX 339-4
Lia Corrales, Eric V. Gotthelf, Efrain Gatuzz +7
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 eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments
Angie Veronica, Thomas H. Reiprich, Florian Pacaud +17
Aims. We aim to characterize the gas properties in the cluster outskirts () and in the detected inter-cluster filaments () of the A3391/95 system and t…
Measuring sloshing, merging and feedback velocities in the Virgo cluster
Efrain Gatuzz, J. S. Sanders, K. Dennerl +5
We present a detailed analysis of the velocity structure of the Virgo cluster using {\it XMM-Newton} observations. Using a novel technique which uses uses the Cu K instrumental…
Chemical enrichment of the ICM within the Virgo cluster I: radial profiles
Efrain Gatuzz, J. Sanders, K. Dennerl +8
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 s…
XRISM spectroscopy of a crowded Galactic center region -- I. Disentangling the sources in the field of view
Maxime Parra, Kai Matsunaga, Shifra Mandel +16
The Galactic center is a complex and crowded region hosting the supermassive black hole Sgr A*, numerous accreting compact objects, and diffuse X-ray emission. This paper presents…
The SRG/eROSITA All-Sky Survey: View of the Virgo Cluster
Hannah McCall, Thomas H. Reiprich, Angie Veronica +11
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…
Probing the physical properties of the intergalactic medium using blazars
Tony Dalton, Simon L. Morris, Michele Fumagalli +1
We use Swift blazar spectra to estimate the key intergalactic medium (IGM) properties of hydrogen column density(Nhxigm), metallicity and temperature over a redshift range of 0.03…
Chemical enrichment of ICM within the Centaurus cluster I: radial profiles
Efrain Gatuzz, J. S. Sanders, K. Dennerl +6
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.…
Line Emission Mapper (LEM): Probing the physics of cosmic ecosystems
Ralph Kraft, Maxim Markevitch, Caroline Kilbourne +107
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…
The SRG/eROSITA diffuse soft X-ray background. I. The local hot bubble in the western Galactic hemisphere
Michael C. H. Yeung, Gabriele Ponti, Michael J. Freyberg +10
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…
Probing the structure of the gas in the Milky Way through X-ray high resolution spectroscopy
Efrain Gatuzz, Eugene Churazov
We have developed a new X-ray absorption model, called {\tt IONeq}, which computes the optical depth simultaneously for ions of all abundant elements, assuming ionization e…
Bridging observations and simulations: a machine learning approach to galaxy clusters
Efrain Gatuzz
The intracluster medium (ICM) records the history of galaxy clusters through its complex dynamical properties. To effectively interpret these properties, robust methods are needed…
The Soft-Excess in Mrk 509: Warm Corona or Relativistic Reflection?
Javier A. Garcia, Erin Kara, Dominic Walton +15
We present the analysis of the first NuSTAR observations ( ks), simultaneous with the last SUZAKU observations ( ks), of the active galactic nucleus of the brigh…
Measuring the hot ICM velocity structure function using XMM-Newton observations
Efrain Gatuzz, R. Mohapatra, C. Federrath +4
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 instrumenta…
Measuring the ICM velocity structure in the Ophiuchus cluster
Efrain Gatuzz, J. S. Sanders, K. Dennerl +8
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…
Conflicting disk inclination estimates for the black hole X-ray binary XTE J1550-564
Riley~M. ~T. ~Connors, Javier~A. ~Garcia, James~F. ~Steiner +7
XTE J1550-564 is a black hole X-ray binary for which the dynamical characteristics are well established, and the broadband spectral evolution of the source has been well studied. I…
Probing the parameters of the intergalactic medium using quasars
Tony Dalton, Simon L. Morris, Michele Fumagalli +1
We continue our series of papers on intergalactic medium (IGM) tracers using quasi-stellar objects (QSOs), having examined gamma-ray bursts (GRBs) and blazars in earlier studies. W…