Results 1 to 10 of about 50 (44)
Enlightening the dark ages with dark matter [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 Constraints on dark matter annihilation or decay offer unique insights into the nature of dark matter. We illustrate how surveys dedicated to detect the highly redshifted 21 cm signal from the dark ages will offer a new window into properties of particle dark matter.
Short K. +4 more
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Galaxies into the Dark Ages [PDF]
The Astrophysical Journal, 2017 Abstract We consider the capabilities of current and future large facilities operating at 2–3 mm wavelength to detect and image the [C ii] 158 μm line from galaxies into the cosmic “dark ages” (z ∼ 10–20). The [C ii] line may prove to be a powerful tool in determining spectroscopic redshifts, and galaxy dynamics, for the first galaxies ...
Andrea Ferrara +4 more
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The Dark Age of the Universe [PDF]
Science, 2003 The Dark Age is the period between the time when the cosmic microwave background was emitted and the time when the evolution of structure in the universe led to the gravitational collapse of objects, in which the first stars were formed. The period of reionization started with the ionizing light from the first stars, and it ended when all ...
Jordi Miralda-Escudé +1 more
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International Journal of Modern Physics D, 2016 We argue that dark matter (DM)and dark energy phenomena associated with galactic rotation curves (RC’s), X-ray cluster mass profiles, and type Ia supernova data can be accounted for via small corrections to idealized general relativistic spacetime geometries due to disordered locality.
A. K. Sten +3 more
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Dark energy in the dark ages [PDF]
Astroparticle Physics, 2006 Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or ``reasonable'' canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of \la2% of total energy density at z\gg1 for many models.
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Vision Research, 1999 Older adults have serious difficulty seeing under low illumination and at night, even in the absence of ocular disease. Optical changes in the aged eye, such as pupillary miosis and increased lens density, cannot account for the severity of this problem, and little is known about its neural basis.
Cynthia Owsley +2 more
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LEAVING THE DARK AGES WITH AMIGA [PDF]
The Astrophysical Journal Supplement Series, 2015 We present an Analytic Model of Intergalactic-medium and GAlaxy evolution since the dark ages. AMIGA is in the spirit of the popular semi-analytic models of galaxy formation, although it does not use halo merger trees but interpolates halo properties in grids that are progressively built.
Alberto Manrique +8 more
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The Astrophysical Journal, 2002 A wide range of observational and theoretical arguments suggest that the universe experienced a period of heating and metal enrichment, most likely from starbursting dwarf galaxies. Using a hydrodynamic simulation we have conducted a uniquely detailed theoretical investigation of this epoch at the end of the cosmological ``dark ages''.
Marc Davis +3 more
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Journal of Physics A: Mathematical and Theoretical, 2022 Abstract After recalling some puzzles in cosmology and briefly reviewing the Friedmann–Lemaître cosmos a simple unified model of the ‘dark sector’ is described. This model involves a scalar field and a pseudo-scalar axion field that give rise to dark energy in the form of ‘quintessence’ and to ‘fuzzy’ dark matter, respectively ...
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IJASOS- International E-journal of Advances in Social Sciences, 2015 This article historically will review some cases for lynch culture which is again blacks in America. And will examine the term ‘Afro-American’. Cases like ‘Michael Brown’, ‘Eric Garner’ and ‘Antonio Martin’ are proof of violence is still going on again black society. Lynching is a part of America’s dark sides. Behind lynching, it lays a brutal history
HAYIRLI, Onur, İŞLER, Dilek
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