Results 11 to 20 of about 697,282 (295)
Observational Cosmology with Artificial Neural Networks
Universe, 2022 In cosmology, the analysis of observational evidence is very important when testing theoretical models of the Universe. Artificial neural networks are powerful and versatile computational tools for data modelling and have recently been considered in the ...
Isidro Gómez-Vargas +1 more
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Observational cosmology in macroscopic gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2012 22 ...
Clifton, T, Coley, A, Hoogen, RVD
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Observational constraints on the fractal cosmology
European Physical Journal C: Particles and Fields, 2022 In this paper, we explore a fractal model of the universe proposed by Calcagni (J High Energy Phys 03:120, 2010) for a power-counting renormalizable field theory living in a fractal spacetime.
Mahnaz Asghari, Ahmad Sheykhi
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Observations in quantum cosmology
Classical and Quantum Gravity, 2023 Abstract In this review, we focus on whether a canonical quantization of general relativity can produce testable predictions for cosmology. In particular, we examine how this approach can be used to model the evolution of primordial perturbations. This program of quantum geometrodynamics, first advocated by John Wheeler and Bryce DeWitt,
Leonardo Chataignier +2 more
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Sample Variance in Cosmological Observations with a Narrow Field of View
The Astrophysical Journal, 2023 Surveys with a narrow field of view can play an important role in probing cosmology, but inferences from these surveys suffer from large sample variance, arising from random fluctuations around the cosmic mean.
Peter Espenshade, Jaiyul Yoo
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Machine learning for observational cosmology
Reports on Progress in Physics, 2023 Abstract An array of large observational programs using ground-based and space-borne telescopes is planned in the next decade. The forthcoming wide-field sky surveys are expected to deliver a sheer volume of data exceeding an exabyte.
Kana Moriwaki +2 more
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The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
The Astronomical Journal, 2023 A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key survey metrics. In this paper we present results from VI of the quasar survey
David M. Alexander +71 more
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Predicting cosmological observables with PyCosmo
Astronomy and Computing, 2021 Astronomy and Computing ...
Federica Tarsitano +9 more
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Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument
The Astronomical Journal, 2023 Millions of quasar spectra will be collected by the Dark Energy Spectroscopic Instrument (DESI), leading to a fourfold increase in the number of known quasars.
Allyson Brodzeller +46 more
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, 2022 Within the second half of the last century, quantum cosmology concretely became one of the main research lines within gravitational theory and cosmology. Substantial progress has been made.
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