A5019719687- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Adaptive optics and wavefront sensing
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- Parallel Computing and Optimization Techniques
- Black Holes and Theoretical Physics
- Advanced X-ray Imaging Techniques
- Galaxies: Formation, Evolution, Phenomena
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Matrix Theory and Algorithms
- Superconducting Materials and Applications
- Geophysics and Gravity Measurements
University of California, Merced
2021-2024
Gwangju Institute of Science and Technology
2019-2021
Seoul National University
2019
ABSTRACT This is the second in a series of papers which we use JWST Mid Infrared Instrument multiband imaging to measure warm dust emission sample 31 multiply imaged quasars, be used as probe particle nature dark matter. We present measurements relative magnifications strongly lensed nine systems. The region compact and sensitive perturbations by populations haloes down masses $\sim 10^6$ M$_{\odot }$. Using these flux-ratio combination with five previous narrow-line measurements, constrain...
Abstract Deep learning has been widely and actively used in various research areas. Recently, gauge/gravity duality, a new deep technique called AdS/DL (Deep Learning) proposed. The goal of this paper is to explain the essence simplest possible setups, without resorting knowledge duality. This perspective will be useful for physics problems: from emergent spacetime as neural network classical mechanics problems. For prototypical examples, we choose simple method slightly different standard...
In a strong gravitational lens, perturbations by low-mass dark matter halos can be detected differences between the measured image fluxes relative to expectation from smooth model for mass distribution which contains only effects of main deflector. The abundance these structures used constrain properties matter. Traditionally lensed quasar positions have been predict smooth-model flux ratios. We demonstrate that significant additional information gained using host galaxy appears as an...
ABSTRACT Strong gravitational lensing provides a purely means to infer properties of dark matter haloes and thereby constrain the particle nature matter. lenses sometimes appear as four lensed images background quasar accompanied by spatially resolved emission from host galaxy encircling main deflector (lensed arcs). We present methodology simultaneously reconstruct arcs relative image magnifications (flux ratios) in presence full populations subhaloes line-of-sight haloes. To this end, we...
Learning vector calculus techniques is one of the major hurdles faced by physics undergraduates. However, beginners report various difficulties dealing with index notation due to its bulkiness. Meanwhile, there have been graphical notations for tensor algebra that are intuitive and effective in calculations can serve as a quick mnemonic algebraic identities. Although they introduced applied educational context, best our knowledge, no publications employ three-dimensional Euclidean calculus,...
Strong gravitational lensing provides a purely means to infer properties of dark matter halos and thereby constrain the particle nature matter. lenses sometimes appear as four lensed images background quasar accompanied by spatially-resolved emission from host galaxy encircling main deflector (lensed arcs). We present methodology simultaneously reconstruct arcs relative image magnifications (flux ratios) in presence full populations subhalos line-of-sight halos. To this end, we develop new...
This is the second in a series of papers which we use JWST MIRI multiband imaging to measure warm dust emission sample 31 multiply imaged quasars, be used as probe particle nature dark matter. We present measurements relative magnifications strongly lensed 9 systems. The region compact and sensitive perturbations by populations halos down masses $\sim 10^6$ M$_{\odot}$. Using these flux-ratio combination with 5 previous narrow-line measurements, constrain halo mass function. In our model,...
Learning vector calculus techniques is one of the major missions to be accomplished by physics undergraduates. However, beginners report various difficulties dealing with index notation due its bulkiness. Meanwhile, there have been graphical notations for tensor algebra that are intuitive and effective in calculations can serve as a quick mnemonic algebraic identities. Although they introduced applied educational context, best our knowledge, no publications employ three-dimensional Euclidean...