A5018376049- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Solar and Space Plasma Dynamics
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Computational Physics and Python Applications
- Particle physics theoretical and experimental studies
- Relativity and Gravitational Theory
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Advanced Mathematical Theories and Applications
- Data Analysis with R
- Magnetic confinement fusion research
- Climate variability and models
- Seismology and Earthquake Studies
- Historical, Religious, and Philosophical Studies
- Astronomical Observations and Instrumentation
- Archaeology and Historical Studies
- Superconducting and THz Device Technology
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Neutrino Physics Research
Columbia University
2022-2024
Colgate University
2018-2019
class_sz is a versatile, robust and efficient code, in C Python, optimized to compute theoretical predictions for wide range of observables relevant cross-survey science the Stage IV era. The code public at https://github.com/CLASS-SZ/class_sz along with series tutorial notebooks ( https://github.com/CLASS-SZ/notebooks ). It will be presented full detail paper II. Here we give brief overview key features usage.
The Primordial Inflation Explorer (PIXIE) is an Explorer-class mission concept to measure the energy spectrum and linear polarization of cosmic microwave background (CMB). A single cryogenic Fourier transform spectrometer compares sky external blackbody calibration target, measuring Stokes I, Q, U parameters levels ~200 Jy/sr in each 2.65 degree diameter beam over full sky, 300 frequency channels from 28 GHz 6 THz. With sensitivity 1000 times greater than COBE/FIRAS, PIXIE opens a broad...
Abstract The Primordial Inflation Explorer (PIXIE) is an Explorer-class mission concept to measure the energy spectrum and linear polarization of cosmic microwave background (CMB). A single cryogenic Fourier transform spectrometer compares sky external blackbody calibration target, measuring Stokes I , Q U parameters levels ∼200 Jy/sr in each 2.65° diameter beam over full sky, 300 frequency channels from 28 GHz 6 THz. With sensitivity 1000 times greater than COBE/FIRAS, PIXIE opens a broad...
Abstract The quasar 3C 454.3 underwent a uniquely structured multifrequency outburst in 2016 June. blazar was observed the optical R -band by several ground-based telescopes photometric and polarimetric modes, at γ -ray frequencies Fermi Large Area Telescope, 43 GHz with Very Long Baseline Array. maximum flux density on June 24 both frequencies, reaching <?CDATA ${S}_{\mathrm{opt}}^{\max }=18.91\pm 0.08$?> mJy ${S}_{\gamma }^{\max }=22.20\pm 0.18\times {10}^{-6}$?> ph cm −2 s −1 ,...
As an aid to the study of singular historic events (≲ once/century), such as very large fireballs (in energy range between Chelyabinsk and Tunguska), Hartmann (2015) described distinctions among perception (the initial stimulus observed), conception brain's culturally influenced interpretation what was perceived), reporting (accounts available later researchers). That article suggested a bright fireball source three existing first-century reports “light from heaven, brighter than Sun,”...
In order to extract full cosmological information from next-generation large and high-precision weak lensing (WL) surveys (e.g., Euclid, Roman, LSST), higher-order statistics that probe the small-scale, nonlinear regime of large-scale structure (LSS) need be utilized. WL peak counts, which trace overdensities in cosmic web, are one promising simple statistic for constraining parameters. The physical origin peaks have previously been linked dark matter halos along line sight, this peak-halo...
The thermal Sunyaev-Zel'dovich (tSZ) effect is the distortion generated in cosmic microwave background (CMB) spectrum by inverse-Compton scattering of CMB photons off free, energetic electrons, primarily located intracluster medium (ICM). Cosmic infrared (CIB) from dust emission star-forming galaxies are expected to undergo same process. In this work, we perform first calculation resulting tSZ-like CIB. Focusing on CIB monopole, use a halo model approach calculate both signal and Compton-$y$...
Deviations of the cosmic microwave background (CMB) energy spectrum from a perfect blackbody uniquely probe wide range physics, ranging fundamental physics in primordial Universe ($\mu$-distortion) to late-time baryonic feedback processes (y-distortion). While y-distortion can be detected with moderate increase sensitivity over that COBE/FIRAS, $\Lambda$CDM-predicted $\mu$-distortion is roughly two orders magnitude smaller and requires substantial improvements, foregrounds presenting serious...
The thermal Sunyaev-Zel'dovich effect (tSZ) is a sensitive probe of cosmology, as it traces the abundance galaxy clusters and groups in late-time Universe. Upcoming cosmic microwave background experiments such Simons Observatory (SO) CMB-S4 will provide low-noise high-resolution component-separated tSZ maps covering large sky fraction. signal highly non-Gaussian; therefore, higher-order statistics are needed to optimally extract information from these maps. In this work, we study...
class_sz is a versatile and robust code in C Python that can compute theoretical predictions for wide range of observables relevant to cross-survey science the Stage IV era. The public at https://github.com/CLASS-SZ/class_sz along with series tutorial notebooks (https://github.com/CLASS-SZ/notebooks). It will be presented full detail paper II. Here we give brief overview key features usage.