Results 51 to 60 of about 90,199 (336)
Fortschritte der Physik, EarlyView.Abstract The unification of conformal and fuzzy gravities with internal interactions is based on the facts that i) the tangent group of a curved manifold and the manifold itself do not necessarily have the same dimensions and ii) both gravitational theories considered here have been formulated in a gauge theoretic way.
Gregory Patellis +3 more
wiley +1 more source
Improving Photometric Redshift Estimates with Training Sample Augmentation
The Astrophysical Journal LettersLarge imaging surveys will rely on photometric redshifts (photo- z 's), which are typically estimated through machine-learning methods. Currently planned spectroscopic surveys will not be deep enough to produce a representative training sample for Legacy
Irene Moskowitz +6 more
doaj +1 more source
THE STATE OF THE COSMOLOGICAL MODEL: OBSERVATIONS AND THEORY
Odessa Astronomical Publications, 2017 The main points and trends of observational and theoretical cosmology that influence and form the understanding of the Universe are reviewed.
V. N. Lukash
doaj +1 more source
Distance Duality Test: The Evolution of Radio Sources Mimics a Nonexpanding Universe
The Astrophysical Journal Letters, 2023 Distance duality relation (DDR) marks a fundamental difference between expanding and nonexpanding universes, as an expanding metric causes angular diameter distance smaller than luminosity distance by an extra factor of (1 + z ). Here we report a test of
Pengfei Li
doaj +1 more source
How accurately can we measure the hydrogen 2S->1S transition rate from the cosmological data?
, 2012 Recent progress in observational cosmology, and especially the forthcoming PLANCK mission data, open new directions in so-called precision cosmology. In this paper we illustrate this statement considering the accuracy of cosmological determination of the
Burigana, Carlo +4 more
core +1 more source
Advanced Quantum Technologies, EarlyView.Hardware experiments show a single‐layer Quantum Memory Matrix booster cuts logical error sixfold and, when prepended to a [3,1,3]$[3,1,3]$ repetition code, attains 94 % logical fidelity without extra CX gates. QMM dressing also lowers variational‐training loss by 35 %, offering a measurement‐free, resource‐light route to error suppression on NISQ ...
Florian Neukart +3 more
wiley +1 more source
The Astrophysical JournalWe present the latest results from the Chicago-Carnegie Hubble Program to measure the Hubble constant, using data from the James Webb Space Telescope (JWST). The overall program aims to calibrate three independent methods: (1) tip of the red giant branch
Wendy L. Freedman +5 more
doaj +1 more source
Exposing and Challenging “Grit” in Physics Education
Science Education, EarlyView.ABSTRACT In STEM education, grit is increasingly the focus of research, with scholars and educators seeking to develop and test interventions that will enhance persistence. As part of the special issue Centering Affect and Emotion Toward Justice and Dignity in Science Education, in this paper, we use interviews with 12 white physics faculty to show ...
Amy Robertson +3 more
wiley +1 more source
Detecting the 21 cm Signal from the Cosmic Dark Ages
The Astrophysical JournalThe cosmic “dark ages” is the period between the last scattering of the cosmic microwave background and the appearance of the first luminous sources, spanning redshifts 1100 ≳ z ≳ 30.
Willow Smith, Jonathan C. Pober
doaj +1 more source
CONCEPTS OF COSMOLOGY REGARDING ITS EVOLUTION
The Sky, 2018 Body of beliefs on the basis mythological, religious, and cryptic literature and traditions of conception and eschatology is called Religious or mythological cosmology.Physical cosmology is examined by various astronomers, physicists, and also by ...
Muhammad Zeeshan Ashraf +2 more
doaj +1 more source