Results 51 to 60 of about 89,722 (300)
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
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Revisiting the Oldest Stars as Cosmological Probes: New Constraints on the Hubble Constant
The Astrophysical Journal, 2023 Despite the tremendous advance of observational cosmology, the value of the Hubble constant ( H _0 ) is still controversial (the so-called “Hubble tension”) because of the inconsistency between local/late-time measurements and those derived from the ...
Andrea Cimatti, Michele Moresco
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The Structure and Interpretation of Cosmology: Part I - General Relativistic Cosmology
, 2004 The purpose of this work is to review, clarify, and critically analyse modern mathematical cosmology. The emphasis is upon mathematical objects and structures, rather than numerical computations. This paper concentrates on general relativistic cosmology.
Arp +24 more
core +2 more sources
Berichte zur Wissenschaftsgeschichte, EarlyView.Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Jean‐Philippe Martinez
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
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Observational constraints on soft dark energy and soft dark matter: Challenging ΛCDM cosmology
Nuclear Physics B, 2023 Soft cosmology is an extension of standard cosmology allowing for a scale-dependent equation-of-state (EoS) parameter in the dark sectors, which is one of the properties of soft materials in condensed-matter physics, that may arise either intrinsically ...
Emmanuel N. Saridakis +4 more
doaj
The Truncated Lognormal Distribution as a Luminosity Function for SWIFT-BAT Gamma-Ray Bursts
Galaxies, 2016 The determination of the luminosity function (LF) in Gamma ray bursts (GRBs) depends on the adopted cosmology, each one characterized by its corresponding luminosity distance.
Lorenzo Zaninetti
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Average observational quantities in the timescape cosmology [PDF]
, 2009 We examine the properties of a recently proposed observationally viable alternative to homogeneous cosmology with smooth dark energy, the timescape cosmology.
A. Gabrielli +9 more
core +3 more sources
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