A5019415632- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Measurement and Metrology Techniques
- Adaptive optics and wavefront sensing
- Solar Radiation and Photovoltaics
- Geophysics and Gravity Measurements
- Advanced Surface Polishing Techniques
- Electromagnetic Simulation and Numerical Methods
- Magnetic and Electromagnetic Effects
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Scientific Measurement and Uncertainty Evaluation
- Computational Physics and Python Applications
- GNSS positioning and interference
- Pulsars and Gravitational Waves Research
- Magnetic Field Sensors Techniques
- Oil, Gas, and Environmental Issues
National Tsing Hua University
2024
Jagiellonian University
2017-2021
Colorado State University
2000
Aims. Compact symmetric objects (CSOs) are thought to represent the first step in evolutionary path of radio galaxies. In present study, we investigated X-ray emission two CSOs confirmed emit at GeV energies: PKS 1718–649 and TXS 1146+596. Unveiling origin their observed high-energy is crucial establishing physical parameters source understanding how interact with surrounding medium. Methods. We combined archival new NuSTAR observations 1146+596 have broadband coverage. For both sources,...
Abstract We explore the disk–jet connection in broad-line radio quasar 4C+74.26, utilizing results of multiwavelength monitoring source. The target is unique that its radiative output at wavelengths dominated by a moderately beamed nuclear jet, optical frequencies accretion disk, and hard X-ray range disk corona. Our analysis reveals correlation (local global significance 96% 98% respectively) between bands, with lagging behind jet 250 ± 42 days. discuss possible explanation for this,...
Excess power degradation on global positioning system (GPS) solar arrays has been ascribed to arc-induced contamination. Arcs have also proposed as one source of spurious signals in Los Alamos National Laboratory’s radiofrequency detectors GPS satellites. Both ideas may be confirmed by detecting such arcs with large ground-based optical- and radiotelescopes. Correlation these each other and/or the event times onboard would cement both hypotheses. In this paper, preliminary positive results a...
Abstract The radio source 1146+596 is hosted by the elliptical/S0 galaxy NGC 3894, with a low-luminosity active nucleus. structure compact, suggesting very young age for jets in system. Recently, has been confirmed as high-energy (HE; >0.1 GeV) γ -ray emitter most recent accumulation of Fermi Large Area Telescope data. Here we report on analysis archival Chandra X-ray Observatory data central part galaxy, consisting single 40 ks long exposure. We have found that core spectrum best fitted...
Here we present an analysis of the X-ray morphology and flux variability particularly bright extended Western hotspot in nearest powerful (FR II-type) radio galaxy, Pictor A, based on data obtained with Chandra Observatory. The marks position where relativistic jet, that originates active nucleus system, interacts intergalactic medium, at hundreds-of-kiloparsec distances from host forming a termination shock converts jet bulk kinetic energy to internal plasma. is X-rays due synchrotron...
Compact Symmetric Objects (CSOs) are thought to represent the first step in evolutionary path of radio galaxies. In this work, we investigate X-ray emission two CSOs confirmed emit at GeV energies: PKS 1718-649 and TXS 1146+596. Unveiling origin their observed high-energy is crucial establishing physical parameters source understanding how interact with surrounding medium. We combined archival new NuSTAR observations 1146+596 have a broadband coverage. For both sources, model spectral energy...
Upcoming large telescopes are based on Segmented Mirror Telescope (SMT) technology which uses small hexagonal mirror segments placed side by to form the monolithic surface. The alignment needs be maintained against external disturbances like wind, gravity, temperature and structural vibration. This is achieved using three position actuators per segment working at few-nanometer scale range along with a local closed loop controller. actuator controller required meet very stringent performance...
We present an analysis of the new, deep (94 ksec) Chandra ACIS-S observation radio-loud active galaxy CGCG 292−057, characterized by a LINER-type nucleus and complex radio structure that indicates intermittent jet activity. On scale host bulge, we detected excess X-ray emission with spectrum best fit thermal plasma model temperature ∼0.8 keV. argue this results from compression heating hot diffuse fraction interstellar medium displaced expanding inner, ∼20 kpc-scale lobes observed in...
Here we present detailed analysis of the distinct X-ray emission features within Eastern radio lobe Pictor A galaxy, around jet termination region, utilising data obtained from Chandra Observatory. Various have been selected for study based on their enhanced surface brightness, including five sources that appear point-like, as well three extended regions, one characterised by a filamentary morphology. For those, perform basic spectral 0.5-7keV range. We also investigate various correlations...
Abstract Here we present some preliminary results of our analysis the combined Chandra observations Pictor A radio galaxy. All available data for target, consisting multiple pointings spanning over 15 years and amounting to total exposure time 464 ks, have been included in analysis. We studied detail PSFs core region individual pointings, as well radial profile X-ray surface brightness source dataset, order discriminate between radiative output unresolved host Based on these, performed...
Abstract We present the analysis of 93 ksec Chandra ACIS–S data for galaxy CGCG 292–057 ( z = 0.054), with complex radio structure indicative intermittent jet activity. In order to characterize precisely spectrum unresolved low-luminosity active nucleus in source, we performed detailed MARX/PSF simulations and studied radial profile source region surface brightness. this way, have detected an additional X-ray component extending from a few up ∼10 kpc core, which could be associated hot...