Anna Ogorzałek
A5028814407- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Superconducting and THz Device Technology
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Laser-induced spectroscopy and plasma
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Astro and Planetary Science
- X-ray Diffraction in Crystallography
- Microwave Engineering and Waveguides
- Language and Culture
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Scientific Research and Discoveries
- High-pressure geophysics and materials
- Advanced X-ray and CT Imaging
University of Maryland, College Park
2021-2025
Goddard Space Flight Center
2021-2025
National Aeronautics and Space Administration
2025
Center for Astrophysics Harvard & Smithsonian
2024
Stanford University
2016-2022
Kavli Institute for Particle Astrophysics and Cosmology
2016-2022
Jagiellonian University
2012
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 present significantly improved measurements of turbulent velocities in the hot gaseous halos nearby giant elliptical galaxies. Using deep XMM-Newton Reflection Grating Spectrometer (RGS ) observations and a combination resonance scattering direct line broadening methods, we obtain well bounded constraints for 13 Assuming that turbulence is isotropic, best fit mean 1D velocity ~110 km/s. This implies typical 3D Mach number ~0.45 non-thermal pressure contribution ~6 per cent cores massive...
ABSTRACT High-resolution spectroscopy in soft X-rays will open a new window to map multiphase gas galaxy clusters and probe physics of the intracluster medium (ICM), including chemical enrichment histories, circulation matter energy during large-scale structure evolution, stellar black hole feedback, halo virialization, mixing processes. An eV-level spectral resolution, large field view, effective area are essential separate cluster emissions from Galactic foreground efficiently outskirts....
Abstract We present an analysis of the first two XRISM/Resolve spectra well-known Seyfert-1.5 active galactic nucleus (AGN) in NGC 4151, obtained 2023 December. Our work focuses on nature narrow Fe K α emission line at 6.4 keV, strongest and most common X-ray observed AGN. The total is found to consist three components. Even narrowest component resolved with evident ,1 (6.404 keV) ,2 (6.391 contributions a 2:1 flux ratio, fully consistent neutral gas negligible bulk velocity. Subject...
Abstract We present an initial analysis of the X-Ray Imaging and Spectroscopy Mission (XRISM) first-light observation supernova remnant (SNR) N 132D in Large Magellanic Cloud. The Resolve microcalorimeter has obtained first high-resolution spectrum 1.6–10 keV band, which contains K-shell emission lines Si, S, Ar, Ca, Fe. find that Si S are relatively narrow, with a broadening represented by Gaussian-like velocity dispersion $\sigma _v \sim 450$ km s$^{-1}$. However, Fe He$\alpha$...
We study models of the γ‐ray emission Cyg X‐3 observed by Fermi. calculate average X‐ray spectrum during active periods. Then, we spectra from Compton scattering a photon beam into given direction isotropic relativistic electrons with power‐law distribution, both based on Klein–Nishina cross‐section and in Thomson limit. Applying results to stellar blackbody radiation inner jet X‐3, find that low‐energy break electron distribution at Lorentz factor ∼300–103 is required shape X‐ray/γ‐ray...
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...
Abstract We present XRISM Resolve observations of the core hot, relaxed galaxy cluster Abell 2029 (A2029). find that line-of-sight bulk velocity intracluster medium (ICM) within central 180 kpc is at rest with respect to brightest galaxy, a 3 σ upper limit ∣ v < 100 km s −1 . robustly measure field-integrated ICM dispersion be = 169 ± 10 , obtaining similar results for both single-temperature and two-temperature plasma models account cool core. This result, if ascribed isotropic...
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...
Abstract The X-ray binary system Cygnus X-3 (4U 2030+40, V1521 Cyg) is luminous but enigmatic owing to the high intervening absorption. High-resolution spectroscopy uniquely probes dynamics of photoionized gas in system. In this Letter, we report on an observation Cyg with XRISM/Resolve spectrometer, which provides unprecedented spectral resolution and sensitivity 2–10 keV band. We detect multiple kinematic ionization components absorption emission whose superposition leads complex line...
We extend our previous study of the cool gas responsible for emission OVII X-ray lines in cores clusters and groups galaxies. This is coolest emitting phase connects 10,000 K H {\alpha} to million degree phase, providing a useful tool understand cooling these objects. location O VII its connection intermediate Fe XVII hotter VIII phases. use high-resolution grating spectra elliptical galaxies with strong line detect 11 24 Comparing detection level resonant scattering, which sensitive...
Abstract Sagittarius A East is a supernova remnant with unique surrounding environment, as it located in the immediate vicinity of supermassive black hole at Galactic center, A$^{*}$. The X-ray emission suspected to show features overionized plasma, which would require peculiar evolutionary paths. We report on first observation X-Ray Imaging and Spectroscopy Mission (XRISM). Equipped combination high-resolution microcalorimeter spectrometer large field-of-view CCD imager, we for time...
Abstract Relativistically broadened and redshifted 6.4–6.9 keV iron K lines are observed from many accretion powered objects, including X-ray binaries active galactic nuclei. The existence of gas close to the central engine implies large radiation intensities correspondingly densities if is remain partially ionized. Simple estimates indicate that high needed allow for survival against ionization. These enough rates atomic processes affected by mechanisms related interactions with nearby ions...
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...
Abstract 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 microcalorimeter. 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...
Abstract We present a progress report on the development of , Python package to manage data (input, output, intermediate, atomic database, and model-grids) associated with xstar code for treating photoionized collisionally ionized plasmas. The modular structure database retrieval scheme are described, its functionality is illustrated functions classes performing searches. briefly compare two other spectrum modeling tools: . Graphic abstract
The Line Emission Mapper (LEM) is a Probe mission concept developed in response to NASA's Astrophysics Explorer (APEX) Announcement of Opportunity. LEM has single science instrument composed large-area, wide-field X-ray optic and microcalorimeter imaging spectrometer the focal plane. optimized observe low-surface-brightness diffuse emission over 30′ equivalent diameter field view with 1.3 2.5 eV spectral resolution 0.2−2.0 keV band. Our primary scientific objective map thermal, kinetic,...
ABSTRACT We present a Chandra study of surface brightness fluctuations in the diffuse intracluster medium Perseus Cluster. Our utilizes deep, archival imaging cluster core as well new mosaic 29 short $\, 5\,$-ks observations extending eight different directions out to radii $r_{500} \sim 2.2\, r_{2500}$. Under assumption that distribution densities at given radius is log-normally distributed, two important quantities can be derived from width log-normal density on spatial scale: bias, equal...
Abstract The circumgalactic medium (CGM) plays a crucial role in galaxy evolution as it fuels star formation, retains metals ejected from the galaxies, and hosts gas flows out of galaxies. For Milky Way–type more-massive bulk CGM is hot phases best accessible at X-ray wavelengths. However, our understanding remains largely unconstrained due to its tenuous nature. A promising way probe via absorption studies. Traditional studies utilize bright background quasars, but this method probes pencil...
In the 2020 Astrophysics Decadal Survey, National Academies identified cosmic feedback and structure formation as a key question that should drive research in upcoming decade. response to this recommendation, NASA released call for X-ray IR probe-class missions, with $1B cost cap. The line emission mapper (LEM) is mission concept designed call. LEM single-instrument telescope consists of Wolter–Schwarzschild type I optic 4 m focal length, coupled an microcalorimeter 30′ field view (FoV), 15″...
Actively accreting supermassive black holes significantly impact the evolution of their host galaxies, truncating further star formation by expelling large fractions gas with wide-angle outflows. The X-ray band is key to understanding how these hole winds affect environment, as outflows have high temperatures ($\sim$10$^{5-8}$K). We developed a Bayesian framework for characterizing Active Galactic Nuclei (AGN) an improved ability explore parameter space and perform robust model selection....
The hot, X-ray-emitting phase of the circumgalactic medium in galaxies is believed to be reservoir baryons from which gas flows onto central galaxy and into feedback AGN stars inject mass, momentum, energy, metals. These effects shape velocity fields hot gas, can observed by X-ray IFUs via Doppler shifting broadening emission lines. In this work, we analyze kinematics Milky Way-mass disk TNG50 simulation with synthetic observations determine how future instruments probe structure. We find...