Results 151 to 160 of about 90,199 (336)

A graph-theoretical approach for comparison of observational galaxy distributions with cosmologicalN-body simulations [PDF]

, 2003
Hisashi Ueda, Tsutomu T. Takeuchi, Makoto Itoh   +2 more
openalex   +1 more source

Radioisotopic age constraints of the Cambrian Ritland impact structure, Norway

Meteoritics &Planetary Science, EarlyView.
Abstract Secondary ion mass spectrometry U‐Pb geochronology has been performed on zircon grains separated from impact melt rock from the 2.7 km‐in‐diameter Ritland impact structure, southwestern Norway. Scanning electron microscope‐based imaging techniques, including electron backscatter diffraction analysis, reveal various zircon grain microtextures ...
William R. Hyde, Steven J. Jaret, Gavin G. Kenny, Anders Plan, Elias J. Rugen, Martin J. Whitehouse, Sanna Alwmark   +6 more
wiley   +1 more source

Recovering Cosmic Structure with a Simple Physical Constraint

The Astrophysical Journal
Radio observation of the large-scale structure (LSS) of our Universe faces major challenges from foreground contamination, which is many orders of magnitude stronger than the cosmic signal.
Tian-Cheng Luan, Xin Wang, Jiacheng Ding, Qian Li, Xiao-Dong Li, Weishan Zhu   +5 more
doaj   +1 more source

A statistical investigation into relationships between the IIE irons and the ordinary, F and “HH” chondrites

Meteoritics &Planetary Science, EarlyView.
Abstract It has been proposed that IIE iron meteorites formed through impact processes on a parent body that was composed of either the H chondrites or a much‐debated fourth ordinary chondrite group, the HH chondrites. To resolve this debate, we have compiled a large dataset for the ordinary chondrites, low‐fayalite ungrouped chondrites, and IIE irons,
Rachel S. Kirby, Penelope L. King, Andrew G. Tomkins   +2 more
wiley   +1 more source

Isotopic analysis of tochilinite (carbonate and magnetite) in Winchcombe: Temperature constraints on early‐stage aqueous alteration in the CM parent body

Meteoritics &Planetary Science, EarlyView.
Abstract We report the first oxygen isotope measurements of tochilinite (δ17O: 11.0 ± 2.1‰, δ18O: 23.5 ± 4.0‰ and Δ17O: −1.1 ± 1.2‰) in a CM chondrite (Winchcombe, lithology C [CM2.2/2.3]). We analyzed type‐I tochilinite‐cronstedtite intergrowths (TCIs)—formed by pseudomorphic replacement of kamacite.
M. D. Suttle, R. Findlay, I. A. Franchi, C. Biagioni, X. Zhao, F. A. J. Abernethy, L. Riches, L. Folco   +7 more
wiley   +1 more source

Causality and Prediction in Modern Cosmology

Journal of Philosophical Investigations, 2016
The modern cosmology is based on the observational evidences, but several philosophical principles and metaphysical prejudices play an undeniable role in it. This paper surveys some important attitudes such as causality, prediction, determinism etc.
Mahmoud Mokhtari, Mahdi Golshani
doaj  

The Principle of Phase Transition Cosmology: The Current Universe Formed by the Evolution of Two-Component Quantum Superfluid

Reports in Advances of Physical Sciences
This paper aims to demonstrate that modern cosmology has overlooked the systematic and holistic aspects of the universe’s evolution. It is based on the notion that the primordial universe comprised a two-component quantum superfluid and a synthesis of ...
Xiaodong Yang, Yuchen Yang, Zhen Luo, Yuanbo Bi   +3 more
doaj   +1 more source

A Remark on Observational Cosmology.

, 1961
David Layzer
openalex   +2 more sources

X-ray pre-ionization powered by accretion on the first black holes - II. Cosmological simulations and observational signatures [PDF]

, 2005
Massimo Ricotti, Jeremiah P. Ostriker, Nickolay Y. Gnedin   +2 more
openalex   +1 more source

CMB Anisotropies, Cosmological Parameters and Fundamental Physics: Current Status & Perspectives

, 2004
I describe briefly the Cosmic Microwave Background (hereafter CMB) physics which explains why high accuracy observations of its spatial structure are a unique observational tool both for the determination of the global cosmological parameters and to ...
Bouchet, Francois R.
core   +1 more source