15 research outputs found
GAMA + KiDS:Empirical correlations between halo mass and other galaxy properties near the knee of the stellar-to-halo mass relation
Neo-Newtonian cosmology: An intermediate step towards General Relativity
Cosmology is a field of physics in which the use of General Relativity theory
is indispensable. However, a cosmology based on Newtonian gravity theory for
gravity is possible in certain circumstances. The applicability of Newtonian
theory can be substantially extended if it is modified in such way that
pressure has a more active role as source of the gravitational field. This was
done in the neo-Newtonian cosmology. The limitation on the construction of a
Newtonian cosmology, and the need for a relativistic theory in cosmology are
reviewed. The neo-Newtonian proposal is presented, and its consequences for
cosmology are discussed.Comment: 10 pages. Portuguese version submitted to RBE
Science with the space-based interferometer LISA. IV: probing inflation with gravitational waves
We investigate the potential for the LISA space-based interferometer to
detect the stochastic gravitational wave background produced from different
mechanisms during inflation. Focusing on well-motivated scenarios, we study the
resulting contributions from particle production during inflation, inflationary
spectator fields with varying speed of sound, effective field theories of
inflation with specific patterns of symmetry breaking and models leading to the
formation of primordial black holes. The projected sensitivities of LISA are
used in a model-independent way for various detector designs and
configurations. We demonstrate that LISA is able to probe these well-motivated
inflationary scenarios beyond the irreducible vacuum tensor modes expected from
any inflationary background.Comment: 53 pages, 18 figures; v2: minor changes to match published versio
Luminous red galaxies in the Kilo-Degree Survey: selection with broad-band photometry and weak lensing measurements
Large scale structure and cosmolog