Results 31 to 40 of about 171,556 (244)

DIRECTIONAL DEPENDENCE OF ΛCDM COSMOLOGICAL PARAMETERS [PDF]

The Astrophysical Journal, 2013
6 pages, 7 figures, published in ...
Axelsson, M., Fantaye, Y., Hansen, F. K., Banday, A. J., Eriksen, H. K., Gorski, K. M.   +5 more
openaire   +3 more sources

Probing Departures from ΛCDM by Late-time Datasets

The Astrophysical Journal Supplement Series
Observational data play a pivotal role in identifying cosmological models that are both theoretically consistent and empirically viable. In this work, we investigate the level of preference for dynamical dark energy over a cosmological constant using ...
Himanshu Chaudhary, Vipin Kumar Sharma, Salvatore Capozziello, G. Mustafa   +3 more
doaj   +1 more source

Inhomogeneity-induced variance of cosmological parameters

, 2012
Modern cosmology relies on the assumption of large-scale isotropy and homogeneity of the Universe. However, locally the Universe is inhomogeneous and anisotropic.
Schwarz, Dominik J., Wiegand, Alexander
core   +1 more source

Cosmological Parameters from Observations of Galaxy Clusters [PDF]

, 2011
Studies of galaxy clusters have proved crucial in helping to establish the standard model of cosmology, with a universe dominated by dark matter and dark energy.
Adam B. Mantz, August E. Evrard, Binney J, Biviano A., Gelman A, Sarazin CL, Steven W. Allen, Zwicky F   +7 more
core   +1 more source

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

STATEFINDER PARAMETERS FOR FIVE-DIMENSIONAL COSMOLOGY [PDF]

Modern Physics Letters A, 2008
We study the statefinder parameter in the five-dimensional big bounce model, and apply it to differentiate the attractor solutions of quintessence and phantom field. It is found that the evolving trajectories of these two attractor solutions in the statefinder parameters plane are quite different, and that are different from the statefinder ...
Chang, Baorong, Liu, Hongya, Xu, Lixin, Zhang, Chengwu   +3 more
openaire   +3 more sources

The Role of Cross-Correlations in the Multi-Tracer Area

Universe, 2022
Mapping the same volume of space with different tracers allows us to obtain information through estimated quantities exploiting the multi-tracer technique.
Alain Blanchard
doaj   +1 more source

Axion Dark Matter and Cosmological Parameters

, 2012
We observe that photon cooling after big bang nucleosynthesis (BBN) but before recombination can remove the conflict between the observed and theoretically predicted value of the primordial abundance of $^7$Li.
A. J. Korn, H. Tam, O. Erken, P. Sikivie, Q. Yang   +4 more
core   +1 more source

The morphology of the oval window in Paranthropus robustus compared to humans and other modern primates

The Anatomical Record, EarlyView.
Abstract The oval window (OW) is an opening connecting the inner and middle ear. Its area has been shown to consistently scale with body mass (BM) in primates, and has been used alongside semi‐circular canal (SCC) size to differentiate Homo sapiens and fossil hominins, including Paranthropus robustus.
Ruy Fernandez, José Braga
wiley   +1 more source

Self-tuning of cosmological constant and exit from inflation

, 2004
I review the recent 5D self-tuning solutions of the cosmological constant problem, and try to unify two cosmological constant problems within the framework of the self-tuning solutions.
JIHN E. KIM, Kim J. E., Kim J. E.
core   +2 more sources