Results 121 to 130 of about 92,607 (277)

Constraints on Coasting Cosmological Models from Gravitational-wave Standard Sirens

The Astrophysical Journal
We present the first test of coasting cosmological models with gravitational-wave (GW) standard sirens observed in the first three observing runs of the LIGO–Virgo–KAGRA detector network. We apply the statistical galaxy catalog method adapted to coasting
Peter Raffai, Mária Pálfi, Gergely Dálya, Rachel Gray   +3 more
doaj   +1 more source

Observational Cosmology And The Cosmic Distance Duality Relation

, 2011
We study the validity of cosmic distance duality relation between angular diameter and luminosity distances. To test this duality relation we use the latest Union2 Supernovae Type Ia (SNe Ia) data for estimating the luminosity distance. The estimation of
Jain, Deepak, Jhingan, Sanjay, Nair, Remya   +2 more
core   +1 more source

Wstęp do bayesowskiej metodologii współczesnej kosmologii

Zagadnienia Filozoficzne w Nauce, 2009
The Bayesian framework is used in reconstruction of modern cosmology which actually concentrates on estimation of model parameters. The authors demonstrate that observational cosmology should be treated as an effective theory of the Universe. It realizes
Aleksandra Kurek, Łukasz Kukier, Marek Szydłowski, Paweł Tambor   +3 more
doaj  

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

The JWST Spectroscopic Properties of Galaxies at z = 9−14

The Astrophysical Journal
We characterize the JWST spectra of 61 galaxies at z  = 9−14, including 30 newly confirmed galaxies. We directly compare the z  > 9 spectroscopic properties against 401 galaxies at 6  9, with hard ionizing sources and nitrogen enhancements becoming more ...
Mengtao Tang, Daniel P. Stark, Charlotte A. Mason, Viola Gelli, Zuyi Chen, Michael W. Topping   +5 more
doaj   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source

DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 Bright Galaxy Survey

The Astrophysical Journal
We present three separate void catalogs created using a volume-limited sample of the DESI Data Release 1 Bright Galaxy Survey. We use the algorithms VoidFinder and V ^2 to construct void catalogs out to a redshift of z = 0.24. Excluding voids affected by
Hernan Rincon, Segev Benzvi, Kelly Douglass, Dahlia Veyrat, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Todd Claybaugh, Shaun Cole, Axel de la Macorra, Peter Doel, Andreu Font-Ribera, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Klaus Honscheid, Cullan Howlett, Stephanie Juneau, Robert Kehoe, Sergey Koposov, Andrew Lambert, Martin Landriau, Laurent Le Guillou, Aaron Meisner, Ramon Miquel, John Moustakas, Gustavo Niz, Will Percival, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, Michael Schubnell, Hee-Jong Seo, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Hu Zou   +39 more
doaj   +1 more source

f(R, Σ, T) gravity and cosmic acceleration: A comprehensive analysis of physical and kinematical parameters

Nuclear Physics B
This study investigates the cosmological implications of the modified gravity model f(R, Σ, T), which extends general relativity by incorporating additional geometric and matter-energy contributions.
S.H. Shekh, Anil Kumar Yadav, Anirudh Pradhan, Nafis Ahmad   +3 more
doaj   +1 more source

A geophysical investigation of the Roter Kamm impact crater, Namibia

Meteoritics &Planetary Science, EarlyView.
Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus, Pritam Yogeshwar, Wiebke Mörbe, Bülent Tezkan, Yajun Liu, Bufelo Lushetile, Martin Melles   +6 more
wiley   +1 more source