Results 91 to 100 of about 724 (182)
Characterizing Martian Lithospheric Density Distribution Through Bayesian Gravity Analysis
Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.Abstract One of the best sources of information for probing the inner structure of Mars is gravimetry data from satellites. By combining these measurements with topography data and isostatic theory, the aim of this study is to infer information about lateral density variations in the Martian lithosphere. Previous efforts at direct gravity inversion had
Henrietta Rákóczi +3 more
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Cosmology, Inflation and the Physics of Nothing [PDF]
, 2003 These four lectures cover four topics in modern cosmology: the cosmological constant, the cosmic microwave background, inflation, and cosmology as a probe of physics at the Planck scale. The underlying theme is that cosmology gives us a unique window on the ``physics of nothing,'' or the quantum-mechanical properties of the vacuum.
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Cosmology: The test of inflation [PDF]
Nature, 2009 As the launch of the Planck spacecraft approaches, Eric Hand investigates what the mission could mean for the predominant theory of the moments after the Big Bang.
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Entropy, 2012 We develop the general reconstruction scheme in two scalar model. The quintom-like theory which may describe (different) non-singular Little Rip or de Sitter cosmology is reconstructed.
Yusaku Ito +2 more
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Stratigraphy Preserved on the Jezero Crater Rim Reveals Repeated Impacts on Early Mars
Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.Abstract The outer slopes of the western Jezero crater rim are hypothesized to expose sections of Early‐ to Pre‐Noachian crust uplifted by the Jezero impact, providing an excellent opportunity to investigate the earliest geologic processes active on terrestrial planets.
Alexander J. Jones +27 more
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Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1288-1308, July 2026.Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson +3 more
wiley +1 more source
Inflation and the cosmological constant [PDF]
Physical Review D, 2012 A particular compensation-type solution of the main cosmological constant problem has been proposed recently, with two massless vector fields dynamically canceling an arbitrary cosmological constant Λ. The naive expectation is that such a compensation mechanism does not allow for the existence of an inflationary phase in the very early Universe ...
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Inflation and Cosmological Perturbations [PDF]
, 2010 The purpose of these lectures is to give a pedagogical introduction to inflation and the production of the primordial perturbations, as well as a review of some of the latest developments in this domain.
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Physics Letters B, 1988 Abstract It is argued that the standard constraint ƒ⪷10 12 GeV in the axion theory and related constraints in the theories of other weakly interacting scalar fields do not apply in many versions of the inflationary universe scenario.
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Inflation and isotropization in quintom cosmology
Journal of Cosmology and Astroparticle PhysicsAbstract This paper studies inflation and isotropization in the quintom model in the Bianchi-I, Bianchi-III, and Kantowski-Sachs backgrounds. First, we investigate inherent properties and generalize Heusler's proposition. Then by the use of the dynamical system approach, we consider the system in multiplicative and collective modes of ...
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