A5080179880- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- High-pressure geophysics and materials
- Astrophysics and Star Formation Studies
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Superconducting Materials and Applications
- Luminescence and Fluorescent Materials
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Zeolite Catalysis and Synthesis
- Molecular Junctions and Nanostructures
- Advanced Chemical Physics Studies
- Astrophysical Phenomena and Observations
University of Iowa
2023
University of Connecticut
2023
The interstellar medium in the Milky Way's Central Molecular Zone (CMZ) is known to be strongly magnetised, but its large-scale morphology and impact on gas dynamics are not well understood. We explore properties of magnetic fields CMZ using three-dimensional non-self gravitating magnetohydrodynamical simulations flow an external Way barred potential. find that: (1) field conveniently decomposed into a regular time-averaged component irregular turbulent component. aligns with velocity...
X-ray observations collected over the last decades have revealed a strongly variable signal within Milky Way's Galactic center, interpreted as echoes from its supermassive black hole, Sgr A*. These are traced by strong Fe K$\alpha$ fluorescent line at 6.4 keV of which intensity is proportional to density illuminated molecular gas. Over time, echo scans through clouds (MCs) in our revealing their 3D structure and highlighting densest parts. While previous studies utilized spectral doppler...
Astronomers have used observations of the Galactic gas and dust via infrared, microwave, radio to study molecular clouds in extreme environments such as center. More recently, X- ray telescopes opened up a new wavelength range which these clouds. Previous flaring events from SgrA* propagate X-rays outwards all directions, interact with surrounding gas, illuminating different parts over time. We use combination X-ray Chandra tracers (line data Herschel Submillimeter Array) analyze specific...
Abstract Astronomers have used observations of the Galactic gas and dust via infrared, microwave, radio to study molecular clouds in extreme environments such as center. More recently, X-ray telescopes opened up a new wavelength range which these clouds. Previous flaring events from Sgr A* propagate X-rays outwards all directions, interact with surrounding gas, illuminating different parts over time. We use combination Chandra tracers (line data Herschel Submillimeter Array) analyze specific...
Abstract X-ray observations collected over the past decades have revealed a strongly variable signal within Milky Way’s Galactic center, interpreted as echoes from its supermassive black hole, Sgr A*. These are traced by strong Fe K α fluorescent line at 6.4 keV, intensity of which is proportional to density illuminated molecular gas. Over time, echo scans through clouds (MCs) in our revealing their 3D structure and highlighting densest parts. While previous studies utilized spectral Doppler...
We searched for thermal gyro-synchrotron radio emission from a sample of five radio-loud stars whose X-ray coronae contain hot ($T_e>10^7$ K) component. used the JVLA to measure Stokes I and V/I spectral energy distributions (SEDs) over frequency range 15--45 GHz, determining best-fitting model parameters using power-law models. The SEDs three chromospherically active binaries (Algol, UX Arietis, HR 1099) were well-fit by model, with no evidence However, two weak-lined T Tauri (V410 Tau, HD...
A comprehensive 3-D model of the central 300 pc Milky Way, Central Molecular Zone (CMZ) is fundamental importance in understanding energy cycles galactic nuclei, since structure influences location and intensity star formation, feedback, black hole accretion. Current observational constraints are insufficient to distinguish between existing models. Dust extinction one diagnostic tool that can help determine dark molecular clouds relative bright Galactic Center emission. By combining Herschel...
The interstellar medium in the Milky Way's Central Molecular Zone (CMZ) is known to be strongly magnetised, but its large-scale morphology and impact on gas dynamics are not well understood. We explore properties of magnetic fields CMZ using three-dimensional non-self gravitating magnetohydrodynamical simulations flow an external Way barred potential. find that: (1) field conveniently decomposed into a regular time-averaged component irregular turbulent component. aligns with velocity...
The Central Molecular Zone (CMZ) is the largest reservoir of dense molecular gas in Galaxy and heavily obscured optical near-IR. We present an overview far-IR dust continuum, where clouds are revealed, provided by Herschel inner 40\deg($|l| <$ 20\deg) Milky Way with a particular focus on CMZ. report total ($N$(H$_2$) $> 10^{23}$ cm$^{-2}$) CMZ mass M=$2\substack{+2 \\ -1} \times 10^7$ M$_{\odot}$ confirm that there highly asymmetric distribution gas, about 70-75% at positive longitudes....
The Central Molecular Zone (CMZ) is the way station at heart of our Milky Way Galaxy, connecting gas flowing in from Galactic scales with central nucleus. Key open questions remain about its 3-D structure, star formation properties, and role regulating this inflow. In work, we identify a hierarchy discrete structures CMZ using column density dust temperature maps Paper I (Battersby et al., submitted). We calculate physical ($N$(H$_2$), $T_{\rm{dust}}$, mass, radius) kinematic (HNCO, HCN,...
The Milky Way's Central Molecular Zone (CMZ) is the largest concentration of dense molecular gas in Galaxy, structure which shaped by complex interplay between Galactic-scale dynamics and extreme physical conditions. Understanding 3-D geometry this crucial as it determines locations star formation subsequent feedback. We present a catalogue clouds CMZ using Herschel data. Using archival data from APEX MOPRA surveys, we measure averaged kinematic properties at 1mm 3mm. use ATCA H$_{2}$CO...
We searched for thermal gyro-synchrotron radio emission from a sample of five radio-loud stars whose X-ray coronae contain hot ($T_e>10^7$ K) component. used the JVLA to measure Stokes I and V/I spectral energy distributions (SEDs) over frequency range 15--45 GHz, determining best-fitting model parameters using power-law models. The SEDs three chromospherically active binaries (Algol, UX Arietis, HR 1099) were well-fit by model, with no evidence However, two weak-lined T Tauri (V410 Tau,...