Results 81 to 90 of about 193,127 (291)

Cosmic Chronometers, Pantheon+ Supernovae, and Quasars Favor Coasting Cosmologies over the Flat ΛCDM Model

The Astrophysical Journal
We test and compare coasting cosmological models with curvature parameters $k=\left\{-1,0,+1\right\}$ in ${H}_{0}^{2}{c}^{-2}$ units and the flat ΛCDM model by fitting them to cosmic chronometers (CCs), the Pantheon+ sample of Type Ia supernovae (SNe ...
Peter Raffai, Adrienn Pataki, Rebeka L. Böttger, Alexandra Karsai, Gergely Dálya   +4 more
doaj   +1 more source

Constraints on parameters of models with extra dimension from primordial nucleosynthesis

, 2010
5D models with one 3D brane and one infinite extra dimension are studied. Matter is confined to the brane, gravity extends to the bulk. Models with positive and negative tension of the brane are studied.
Kolb E. W., MIKHAIL Z. IOFA
core   +1 more source

Cosmological consequences of a variable cosmological constant model [PDF]

International Journal of Modern Physics D, 2016
We derive a model of dark energy which evolves with time via the scale factor. The equation-of-state is studied as a function of a parameter [Formula: see text] introduced in this model as [Formula: see text]. In addition to the recent accelerated expansion, the model predicts another decelerated phase.
Azri, Hemza, Bounames, A.
openaire   +3 more sources

Caste as a Social Kind

Journal of Applied Philosophy, EarlyView.
ABSTRACT Gender and race have received significant philosophical attention recently; they are the paradigm cases of social kinds in most philosophical accounts. I argue for the inclusion of caste as a social kind because it affects the lives of many people, and because it presents itself as an important test case for philosophers of social kinds.
Ajinkya Deshmukh
wiley   +1 more source

The standard cosmological model [PDF]

Canadian Journal of Physics, 2006
The Standard Model of Particle Physics (SMPP) is an enormously successful description of high-energy physics, driving ever more precise measurements to find "physics beyond the standard model", as well as providing motivation for developing more fundamental ideas that might explain the values of its parameters.
openaire   +2 more sources

Membership‐Making in Diverse Societies: Revisiting the Idea of Society as a Common Possession

Journal of Applied Philosophy, EarlyView.
ABSTRACT The traditional aim of Western social democracy has been to create a society that is a ‘common possession’ of its members (in T.H. Marshall's words). Social democratic politics has therefore been both society‐making and membership‐making, orienting people to a shared society as an object of attachment and loyalty, and nurturing membership ...
Will Kymlicka
wiley   +1 more source

No Chaos in Brane-World Cosmology

, 2002
We discuss the asymptotic dynamical evolution of spatially homogeneous brane-world cosmological models close to the initial singularity. We find that generically the cosmological singularity is isotropic in Bianchi type IX brane-world models and ...
A A Coley, Akama K, Anguige K, Barrow J D, Barrow J D, Belinskii V A, Belinskii V A, Belinskii V A, Coley A A, Foster S, Goode S W, Ida D, Isenberg J, Kichenassamy S, Kitada Y, Kraus P, Lesgourgues J, Lin X F, Penrose R, Rendall A D, Rendall A D, Ringström H, Uggla C, van Elst H, Wainwright J   +24 more
core   +1 more source

Early deglaciation history of the southeastern Baffin Island shelf (Eastern Canadian Arctic Archipelago)

Journal of Quaternary Science, EarlyView.
ABSTRACT During the last glacial period, the Laurentide Ice Sheet (LIS) was the largest terrestrial ice sheet on Earth. Its evolution since the Last Glacial Maximum profoundly influenced Earth's geodynamics and surface processes. Investigating the past dynamics of the LIS provides critical insights into how contemporary ice sheets may respond to ...
Alexis P. Belko, Alexandre Normandeau, Patrick Lajeunesse, Audrey Limoges   +3 more
wiley   +1 more source

Arc Statistics in Cosmological Models with Dark Energy

, 2003
We investigate how the probability of the formation of giant arcs in galaxy clusters is expected to change in cosmological models dominated by dark energy with an equation of state p=w rho c^2 compared to cosmological-constant or open models.
Abroe, Bardeen, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bullock, C. Baccigalupi, Carroll, Chiba, Cooray, Douspis, Efstathiou, Eke, F. Perrotta, Falco, Flores, Flores, Gioia, Golse, Halverson, Helbig, Kassiola, Kaufmann, Keeton, Kochanek, Kochanek, L. Moscardini, Lacey, Lacey, Le Fèvre, Lee, Luppino, M. Bartelmann, M. Meneghetti, Mainini, Meneghetti, Meneghetti, Meneghetti, Navarro, Navarro, Netterfield, Oguri, Oguri, Peebles, Perlmutter, Press, Quast, Reiprich, Richstone, Riess, Sheth, Wang, Wang, Wu, Zaritsky   +57 more
core   +3 more sources

COSMOLOGICAL PERTURBATIONS AND THE RUNNING COSMOLOGICAL CONSTANT MODEL [PDF]

International Journal of Modern Physics D, 2012
We study the matter density fluctuations in the running cosmological constant (RCC) model using linear perturbations in the longitudinal gauge. Using this observable, we calculate the growth rate of structures and the matter power spectrum, and compare these results to SDSS data and the available data for linear growth rate.
openaire   +2 more sources