Results 81 to 90 of about 90,199 (336)

BBN and the Primordial Abundances

, 2005
The relic abundances of the light elements synthesized during the first few minutes of the evolution of the Universe provide unique probes of cosmology and the building blocks for stellar and galactic chemical evolution, while also enabling constraints ...
C. Chiappini, D. Kirkman, D.N. Spergel, G. Steigman, G. Steigman, I. Iben, J. Lequeux, J. Melendez, J.A. Thorburn, J.N. Bahcall, J.P. Kneller, K.A. Olive, L. Randall, M. Kawasaki, M.H. Pinsonneault, P. Bonifacio, R.T. Rood, S. Cassisi, S.G. Ryan, S.M. Viegas, T.M. Bania, V. Barger   +21 more
core   +2 more sources

Cosmological Simulations of Multi-Component Cold Dark Matter [PDF]

, 2014
The nature of dark matter is unknown. A number of dark matter candidates are quantum flavor-mixed particles but this property has never been accounted for in cosmology.
Medvedev, Mikhail V.
core   +2 more sources

Cosmological models: Theory and observations [PDF]

Advances in Space Research, 2003
7 pages, invited talk at 33rd COSPAR Scientific Assembly (Warsaw, Poland, 16-23 July 2000), cospar.sty is ...
openaire   +3 more sources

On Babushkas and Postcapitalism: Theorising Diverse Economies from the Global East

Antipode, EarlyView.
Abstract As transformative visions for more just and sustainable societies multiply around the globe, the Diverse and Community Economies approach presents one of the most influential strategies to advance postcapitalist visions. In this paper, we contribute to this project based on our research and activism in the Global East, intended here as Central
Lucie Sovová, Ottavia Cima, Petr Jehlička, Lilian Pungas, Markus Sattler, Thomas S.J. Smith, Anja Decker, Nadia Johanisova, Sunna Kovanen, Peter North, on behalf of Polička Collective   +10 more
wiley   +1 more source

New Tests of the Cosmic Distance Duality Relation with DESI 2024 Baryon Acoustic Oscillation Observations

The Astrophysical Journal
In this paper, we test the cosmic distance duality relation (CDDR), as required by the Etherington reciprocity theorem, which connects the angular diameter distance and the luminosity distance via the relation D _L ( z ) =  D _A ( z )(1 +  z ) ^2 .
Qiumin Wang, Shuo Cao, Jianyong Jiang, Kaituo Zhang, Xinyue Jiang, Tonghua Liu, Chengsheng Mu, Dadian Cheng   +7 more
doaj   +1 more source

Populating the Landscape: A Top Down Approach

, 2006
We put forward a framework for cosmology that combines the string landscape with no boundary initial conditions. In this framework, amplitudes for alternative histories for the universe are calculated with final boundary conditions only.
J. Barrow, J. B. Hartle, J. B. Hartle, S. W. Hawking, Thomas Hertog   +4 more
core   +3 more sources

Is Cosmology Solved? [PDF]

, 1998
We have fossil evidence from the thermal background radiation that our universe expanded from a considerably hotter denser state. We have a well defined and testable description of the expansion, the relativistic Friedmann-Lemaitre model.
de Sitter W., Fukugita M., P. J. E. Peebles, Pont F., Ratra B., White D., White S. D. M.   +6 more
core   +2 more sources

Deadly Lifeworlds Meet Palliative Politics: Struggle in Circulation

Antipode, EarlyView.
Abstract This paper locates acute and ongoing crises of coloniality and ecology within struggles over circulation that are anchored in infrastructure. If infrastructure organises movement—including its constraint in carceral forms—then it is also a linchpin for materialising distinct regimes of motion (Nail 2020a; Marx in Motion: A New Materialist ...
Deborah Cowen
wiley   +1 more source

Newest Measurements of Cosmic Curvature with BOSS/eBOSS and DESI DR1 Baryon Acoustic Oscillation Observations

The Astrophysical Journal Letters
Determining the cosmic curvature (Ω _K ) independent of cosmological models plays a key role in revealing the background physics of our Universe. In this Letter, we propose an improved method to measure the cosmic curvature using the observations of ...
Tonghua Liu, Shengjia Wang, Hengyu Wu, Shuo Cao, Jieci Wang   +4 more
doaj   +1 more source

Observational constraints on entropic cosmology

Physics Letters B
In this work, we derive a generalized modified Friedmann equation based on an entropy-area relation that incorporates established modifications, such as volumetric, linear, and logarithmic terms, in addition to novel entropic modifications that might ...
Javier Chagoya, I. Díaz-Saldaña, Mario H. Amante, J.C. López-Domínguez, M. Sabido   +4 more
doaj   +1 more source