A5012777177- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Superconducting and THz Device Technology
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Plant Water Relations and Carbon Dynamics
- Methane Hydrates and Related Phenomena
- Pharmacological Effects and Assays
- Advanced Optical Sensing Technologies
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Ionosphere and magnetosphere dynamics
- Particle physics theoretical and experimental studies
- Microwave Engineering and Waveguides
- Astro and Planetary Science
Max Planck Institute for Astronomy
2020-2024
University of Maryland, Baltimore
2023-2024
Goddard Space Flight Center
2023-2024
University of Maryland, Baltimore County
2023-2024
Center for Astrophysics Harvard & Smithsonian
2024
Max Planck Institute for Astrophysics
2023
Eötvös Loránd University
2017-2020
International Centre for Interdisciplinary Science and Education
2018
University of Rome Tor Vergata
2016-2017
The Line Emission Mapper (LEM) is an X-ray Probe for the 2030s that will answer outstanding questions of Universe's structure formation. It also provide transformative new observing capabilities every area astrophysics, and to heliophysics planetary physics as well. LEM's main goal a comprehensive look at galaxy formation, including stellar black-hole feedback flows baryonic matter into out galaxies. These processes are best studied in X-rays, emission-line mapping pressing need this area....
We introduce the new TNG-Cluster project, an addition to IllustrisTNG suite of cosmological magnetohydrodynamical simulations galaxy formation. Our objective is significantly increase statistical sampling most massive and rare objects in Universe: clusters with log( M 200c / ⊙ ) ≳ 14.3 − 15.4 at z = 0. To do so, we re-simulate 352 cluster regions drawn from a 1 Gpc volume that 36 times larger than TNG300, keeping physical model entirely fixed as well numerical resolution. This sample...
The intracluster medium (ICM) of galaxy clusters encodes the impact physical processes that shape these massive halos, including feedback from central supermassive black holes (SMBHs). In this study, we examine gas thermodynamics, kinematics, and effects SMBH on core Perseus-like with a new simulation suite: TNG-Cluster. We first make selection simulated similar to Perseus based total mass inner ICM properties, such as their cool-core nature. identify 30 systems among 352 TNG-Cluster halos...
We analyse cosmological hydrodynamical simulations of galaxy clusters to study the X-ray scaling relations between total masses and observable quantities such as luminosity, gas mass, temperature, $Y_{X}$. Three sets are performed with an improved version smoothed particle hydrodynamics GADGET-3 code. These consider following: non-radiative gas, star formation stellar feedback, addition feedback by active galactic nuclei (AGN). select $M_{500} > 10^{14} M_{\odot} E(z)^{-1}$, mimicking...
We analyze the radial pressure profiles, ICM clumping factor and Sunyaev-Zel'dovich (SZ) scaling relations of a sample simulated galaxy clusters groups identified in set hydrodynamical simulations based on an updated version TreePM-SPH GADGET-3 code. Three different sets are performed: first assumes non-radiative physics, others include, among other processes, AGN and/or stellar feedback. Our results analyzed as function redshift, cluster mass cool-coreness or dynamical state. In general,...
ABSTRACT The TNG50 cosmological simulation produces X-ray emitting bubbles, shells, and cavities in the circumgalactic gas above below stellar discs of Milky Way- Andromeda-like galaxies with morphological features reminiscent eROSITA Fermi bubbles Galaxy. Two-thirds 198 MW/M31 analogues inspected at z = 0 show one or more large-scale, coherent overpressurized that impinge into gaseous halo. Some include a succession shells increasing size, ranging from few to many tens kpc. These are...
Hot gaseous atmospheres that permeate galaxies and extend far beyond their stellar distribution, where they are commonly referred to as the circumgalactic medium (CGM), imprint important information about feedback processes powered by populations of central supermassive black holes (SMBH). In this work we study properties hot X-ray emitting using IllustrisTNG cosmological simulations. We analyse mock spectra, obtained from diffuse metal-enriched gas in TNG100 TNG50, compare results with...
We aim at characterizing the hot phase of Circum-Galactic Medium in a large sample galaxies. stack X-ray events from SRG/eROSITA eFEDS survey around central galaxies GAMA 9hr field to construct radially projected soft luminosity profiles as function their stellar mass and specific star formation rate. consider samples quiescent (star-forming) range $2\times 10^{10}$ -- $10^{12}$ M$_\odot$ ($3\times 10^9$ $6\times10^{11}$ M$_\odot$). For galaxies, are clearly extended throughout available...
We analyzed the physical properties of gaseous intracluster medium (ICM) at center massive galaxy clusters with TNG-Cluster, a new cosmological magnetohydrodynamical simulation. Our sample contains 352 simulated spanning halo mass range 10 14 < M 500c / ⊙ 2 × 15 z = 0. focused on proposed classification into cool-core (CC) and non-cool-core (NCC) populations, 0 distribution cluster central ICM properties, redshift evolution CC population. resolved structure radial profiles entropy,...
We apply a stacking technique to gain enough statistics detect the hot CGM around galaxies. use X-ray data from first four SRG/eROSITA all-sky surveys (eRASS:4). discuss how satellite galaxies could bias and carefully build central galaxy samples based on SDSS spectroscopic survey halo-based group finder algorithm isolated sample ninth release of DESI Legacy (LS DR9, photometric). mask detected point sources model emission unresolved active galactic nuclei (AGN) binaries (XRB) obtain CGM....
ABSTRACT The circumgalactic medium (CGM) encodes signatures of the galaxy-formation process, including interaction galactic outflows driven by stellar and supermassive black hole (SMBH) feedback with gaseous halo. Moving beyond spherically symmetric radial profiles, we study angular dependence CGM properties around z = 0 massive galaxies in IllustrisTNG simulations. We characterize signal density, temperature, metallicity as a function galaxy mass, halo distance, SMBH via stacking. TNG...
We derive predictions from state-of-the-art cosmological galaxy simulations for the spatial distribution of hot circumgalactic medium (CGM, ${\rm [0.1-1]R_{200c}}$) through its emission lines in X-ray soft band ($[0.3-1.3]$ keV). In particular, we compare IllustrisTNG, EAGLE, and SIMBA focus on galaxies with stellar mass $10^{10-11.6}\, \MSUN$ at $z=0$. The three simulation models return significantly different surface brightness radial profiles prominent ionized metals such as OVII(f),...
ABSTRACT We study the impact of resonantly scattered X-ray line emission on observability hot circumgalactic medium (CGM) galaxies. apply a Monte Carlo radiative transfer post-processing analysis to high-resolution TNG50 cosmological magnetohydrodynamical galaxy formation simulation. This allows us model resonant scattering O vii(r) photons within complex, multiphase, multiscale CGM. The transition vii He-like triplet is one brightest, and most promising, lines for detecting CGM measuring...
Context. The circumgalactic medium (CGM) provides the material needed for galaxy formation and influences evolution. hot ( T > 10 6 K ) CGM is poorly detected around galaxies with stellar masses M * lower than 3 × 11 ⊙ due to low surface brightness. Aims. We aim detect X-ray emission from Milky Way-mass (MW-mass, log( / = 10.5 − 11.0) M31-mass (log( 11.0 11.25) galaxies, in addition measuring brightness profile of CGM. Methods. applied a stacking technique gain enough statistics used data...
Gamma and X-ray observatories have revealed spectacular structures in the emission of tenuous hot gas surrounding Milky Way (MW), known as Fermi eROSITA bubbles. Galaxy formation simulations suggest that MW-like bubbles could be ubiquitous, but their may too faint to detect with today's instruments individual external galaxies. In this paper, we present an analysis stacked Chandra observations 93 nearby We detected soft, diffuse X-rays from CGM, extending up 14 kpc, a luminosity...
Abstract Gamma and X-ray observatories have revealed spectacular structures in the emission of tenuous hot gas surrounding Milky Way (MW), known as Fermi extended ROentgen Survey with an Imaging Telescope Array (eROSITA) bubbles. Galaxy formation simulations suggest that MW-like bubbles could be ubiquitous, but their may too faint to detect today’s instruments individual external galaxies. In this paper, we present analysis stacked Chandra observations 93 nearby We detected soft, diffuse...
ABSTRACT Recent X-ray observations have revealed remarkable correlations between the masses of central supermassive black holes (SMBHs) and properties hot atmospheres permeating their host galaxies, thereby indicating crucial role atmospheric gas in tracing SMBH growth high-mass regime. We examine this topic theoretically using IllustrisTNG cosmological simulations provide insights to nature – gaseous halo connection. By carrying out a mock analysis for mass-selected sample TNG100 simulated...
Aims. Understanding how the properties of galaxies relate to hot circum-galactic medium (CGM) around them can constrain galaxy evolution models. We aim measure scaling relations between X-ray luminosity CGM and fundamental (stellar mass halo mass) a galaxy. Methods. measured based on surface brightness profiles central samples from Spectrum Roentgen Gamma (SRG)/eROSITA all-sky survey data. related galaxies’ stellar mass, we compared observed self-similar model intrinsic (i.e., not...
X-ray measurements find systematically lower Fe abundances in the emitting haloes pervading groups ($kT\lesssim1.7$ keV) than clusters of galaxies. These results have been difficult to reconcile with theoretical predictions. However, models using incomplete atomic data or assumption isothermal plasmas may biased best fit abundance and giant elliptical galaxies low. In this work, we take advantage a major update code spectral fitting package SPEX re-evaluate 43 clusters, groups, (the CHEERS...
ABSTRACT We present a study of relations between the masses central supermassive black holes (SMBHs) and atmospheric gas temperatures luminosities measured within range radii Re 5Re, for sample 47 early-type galaxies observed by Chandra X-ray Observatory. report discovery tight correlation brightest cluster/group (BCGs) their SMBH masses. Furthermore, our hydrostatic analysis reveals an approximately linear total BCGs (Mtot) (MBH). State-of-the-art cosmological simulations show that mass...
ABSTRACT We report results from deep Suzaku and mostly snapshot Chandra observations of four nearby galaxy groups: MKW4, Antlia, RXJ1159+5531, ESO3060170. Their peak temperatures vary over 2–3 keV, making them the smallest systems with gas properties constrained to their viral radii. The average Fe abundance in outskirts (R &gt; 0.25R200) intragroup medium is $Z_{\rm Fe}=0.309\pm 0.018\, Z_\odot$ χ2 = 14 for 12 degrees freedom, which remarkably uniform strikingly similar that massive...
Abstract The hot, X-ray-emitting phase of the circumgalactic medium massive galaxies is believed to be reservoir baryons from which gas flows onto central galaxy and into feedback active galactic nuclei stars inject mass, momentum, energy, metals. These effects shape velocity fields hot gas, can observed via Doppler shifting broadening emission lines by X-ray integral field units. In this work, we analyze kinematics Milky Way–mass disk TNG50 simulation with synthetic observations determine...
Galaxy clusters are unique laboratories for studying astrophysical processes and their impact on halo gas kinematics. Despite importance, the full complexity of motion within around these remains poorly known. This paper is part a series presenting first results from new TNG-Cluster simulation, suite comprising 352 high-mass galaxy including cosmological context, mergers accretion, baryonic feedback, magnetic fields. Studying dynamics coherence flows, we find that motions in cluster cores...
Recent X-ray observations of galaxy clusters show that the distribution intra-cluster medium (ICM) metallicity is remarkably uniform in space and time. In this paper, we analyse a large sample simulated objects, from poor groups to rich clusters, study dependence related quantities on mass systems. The simulations are performed with an improved version smoothed-particle-hydrodynamic GADGET-3 code consider various astrophysical processes including radiative cooling, metal enrichment feedback...
The Astro2020 Decadal Survey has identified the mapping of circumgalactic medium (CGM, gaseous plasma around galaxies) as a key objective. We explore prospects for characterizing CGM in and nearby galaxy halos with future large grasp X-ray microcalorimeters. create realistic mock observations from hydrodynamical simulations (EAGLE, IllustrisTNG, Simba) that demonstrate wide range potential measurements, which will address open questions formation evolution. By including all background...