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In this article we address the mystery of dark matter. We expound the various evidences, astrophysical and cosmological, leading to hypothesize the existence of an invisible form of matter, whose attempts at detecting it have so far all failed.
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SPIE Proceedings, 2004
Dark matter is one of the most fundamental and perplexing issues of modern physics. Its presence is deduced from a straightforward application of Newton’s theory of gravity to astronomical systems whose dynamical motion should be simple to understand. The success of Newton’s theory in describing the behavior of the solar system was one ...
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Dark matter is one of the most fundamental and perplexing issues of modern physics. Its presence is deduced from a straightforward application of Newton’s theory of gravity to astronomical systems whose dynamical motion should be simple to understand. The success of Newton’s theory in describing the behavior of the solar system was one ...
openaire +1 more source
Possible interaction between baryons and dark-matter particles revealed by the first stars
Nature, 2018The cosmic radio-frequency spectrum is expected to show a strong absorption signal corresponding to the 21-centimetre-wavelength transition of atomic hydrogen around redshift 20, which arises from Lyman-α radiation from some of the earliest stars.
R. Barkana
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Dark matter and dark matter candidates
Advances in Space Research, 2008Abstract The nature and identity of the dark matter of the Universe is one of the most challenging problems facing modern cosmology. Only 5% of the energy density of the Universe can be associated with known forms of matter. Problems for baryonic and neutrino dark matter imply the necessity to search beyond the standard model for dark matter ...
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Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 1999
Summary: For over 50 years astronomers have been taking a careful inventory of matter in the universe. Comparing the visible mass with the amount inferred from dynamical estimators reveals that we do not know the nature of at least 90\% of the material in the universe.
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Summary: For over 50 years astronomers have been taking a careful inventory of matter in the universe. Comparing the visible mass with the amount inferred from dynamical estimators reveals that we do not know the nature of at least 90\% of the material in the universe.
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Scientific American, 2016
The article reports on the move of scientists to take a second look at conditions of dark matter due to disappointments to discover these elusive particles known as weakly interacting massive particles (WIMP). Topics include the time spent by scientists to look for flashes of light emanating from WIMPs striking xenon nuclei, and the possibility that ...
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The article reports on the move of scientists to take a second look at conditions of dark matter due to disappointments to discover these elusive particles known as weakly interacting massive particles (WIMP). Topics include the time spent by scientists to look for flashes of light emanating from WIMPs striking xenon nuclei, and the possibility that ...
openaire +2 more sources
2017
In this paper, we introduce the astrophysical problem of dark matter (DM) mainly focusing on the observational/experimental point of view. Even though DM cannot be observed directly, there are plenty of indirect observations supporting that there is more mass than we can see. This is the case for the observed properties of galaxies, galaxy clusters and
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In this paper, we introduce the astrophysical problem of dark matter (DM) mainly focusing on the observational/experimental point of view. Even though DM cannot be observed directly, there are plenty of indirect observations supporting that there is more mass than we can see. This is the case for the observed properties of galaxies, galaxy clusters and
openaire +1 more source