Results 51 to 60 of about 9,062,230 (261)
On problems with cosmography in cosmic dark ages
Physics Letters B, 2021 Quasars show considerable promise as standard candles in a high-redshift window beyond Type Ia supernovae. Recently, Risaliti, Lusso & collaborators [1–3] have succeeded in producing a high redshift Hubble diagram (z≲7) that supports “a trend whereby
A. Banerjee +4 more
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The R/renaissance(s), Humanists And Classics
The Journal of Classics Teaching, 2018 First, where does the Renaissance fit in chronologically with other periods of the past? There is general agreement that the Renaissance should be dated from 1300 to 1650, though some believe that a more accurate and meaningful starting date would be ...
Jerome Moran
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Geosciences, 2021 The Late Holocene was characterized by several centennial-scale climate oscillations including the Roman Warm Period, the Dark Ages Cold Period, the Medieval Warm Period and the Little Ice Age.
Sarah Waltgenbach +6 more
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Age constraints and fine tuning in variable-mass particle models [PDF]
Phys.Rev.D69:063517,2004, 2003 VAMP (variable-mass particles) scenarios, in which the mass of the cold dark matter particles is a function of the scalar field responsible for the present acceleration of the Universe, have been proposed as a solution to the cosmic coincidence problem, since in the attractor regime both dark energy and dark matter scale in the same way.
arxiv +1 more source
Indirect dark matter signatures in the cosmic dark ages. II. Ionization, heating, and photon production from arbitrary energy injections [PDF]
, 2015 Any injection of electromagnetically interacting particles during the cosmic dark ages will lead to increased ionization, heating, production of Lyman-alpha photons and distortions to the energy spectrum of the cosmic microwave background, with ...
T. Slatyer
semanticscholar +1 more source
Vietnam Journal of Science, Technology and Engineering, 2022 This study was conducted to compare the black and dark brown varieties of Noi purebred chickens raised in an intensive farming system. A total of 600 black and 600 dark brown Noi chickens were observed starting from 1 day after hatching.
Vu Hoa Dang +8 more
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Child Development, 2019 Mainly for methodological reasons, little is known about the course of development of early cognitive competencies diagnosed with the violation of expectation (VoE) method in infants. The goal of this research was to evaluate the use of pupillometry as a
Markus Krüger +2 more
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Book culture and education in Early Byzantium (4th — 7th centuries CE): Asia Minor
Материалы по археологии и истории античного и средневекового Причерноморья, 2021 The paper considers the role of book culture, the state and evolution of education in the Eastern Mediterranean of the early Byzantine time (4th — 7th centuries) in the context of the cultural continuity between Antiquity and the Middle Ages, using the ...
Denisova, I.V.
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Cosmic age problem revisited in the holographic dark energy model [PDF]
Phys.Lett.B690:233-238,2010, 2010 Because of an old quasar APM 08279+5255 at $z=3.91$, some dark energy models face the challenge of the cosmic age problem. It has been shown by Wei and Zhang [Phys. Rev. D {\bf 76}, 063003 (2007)] that the holographic dark energy model is also troubled with such a cosmic age problem. In order to accommodate this old quasar and solve the age problem, we
arxiv +1 more source
Dark-ages reionization and galaxy formation simulation–XI. Clustering and halo masses of high redshift galaxies [PDF]
, 2017 We investigate the clustering properties of Lyman-break galaxies (LBGs) at $z\sim6$ - $8$. Using the semi-analytical model {\scshape Meraxes} constructed as part of the Dark-ages Reionization And Galaxy-formation Observables from Numerical Simulation ...
Jaehong Park +13 more
semanticscholar +1 more source