Ravi Sheth - iiap.res.in
The Phenomenology of. Large Scale Structure. Ravi K Sheth (Penn/ICTP). Chandrasekhar and. Page 2. • Motivation: A biased view of dark matters.
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The Weak Lensing Signal and the Clustering of BOSS Galaxies II
dark energy and cold dark matter – both motivated by as- ... bution and the phenomenological behaviour of these compo- nents. ... ing the latter requires constraints on the growth of structure in ... as tracers produces a biased view of the matter distribution ... On large scales the bias of halos and the galaxies that re -.
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On Detecting Halo Assembly Bias with Galaxy Populations
The fact that the clustering of dark matter halos depends not only on their ... Subject headings: cosmology: large-scale structure of Universe, galaxies: .... 2013 for a different point of view). Therefore, both of these assumptions seem to be well founded in theoret- ical/phenomenological models of galaxy formation ( see also.
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Growth of Cosmic Structure: Probing Dark Energy - arXiv.org
Sep 24, 2013 ... Growth of structure at large spatial scales in the universe. .... (dark matter and Λ), and given the lack of theoretical motivation .... independent, it is useful to use phenomenological parametrizations .... growth constraints and reduce uncertainties arising from galaxy bias and nonlinearities that are otherwise.
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Growth of Cosmic Structure: Probing Dark Energy Beyond Expansion
discoveries of physics at large scales, and this makes the growth of structure a very .... ingredients (dark matter and Λ), and given the lack of theoretical motivation .... model independent, it is useful to use phenomenological parametrizations .... growth constraints and reduce uncertainties arising from galaxy bias and ...
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Dark matter, dark energy - LUTH
Apr 15, 2003 ... The large-scale structure of the universe and its statistical properties can reveal many aspects ... Indeed, the phenomenological ... During the last few years our views on the matter and energy content of the ...... The observation of large-scale flows is motivated by the remark that objects embedded in the.
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dark matter (DM) evolution: methods+results. Tomorrow: ... Cluster physics and phenomenology ... dark matter baryons an engineer's view of galaxy formation ... star formation prescriptions are empirically motivated. Page 15. large-scale structure simulations: overview of algorithmic evolution ... halo clustering (aka, bias). + .
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The phenomenological approach to modeling the dark energy
a rather personal view of the dark energy, focused on its phenomenological aspects, and I .... agreement with all the data, and in addition it remains the best- motivated model. Is it really ... the structure that we see around us. ... The large- scale evolution of the Universe is described well by General Relativity (GR). 3.
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Clustering of dark matter tracers: generalizing bias for the coming
Feb 6, 2009 ... model for large-scale clustering of galaxies (or other dark matter ... of the possibilities for measuring large-scale structure (hereafter, LSS, ... The redshift dependence is motivated by [11, 12].) ... cal/phenomenological calculations of predictions for the statistics, if we are to .... Generally, the idea that the mass.
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Large-Scale Structure at the Turn of the Millennium
Nov 8, 1999 ... Our view of the large–scale distribution of luminous objects in the Universe has ... to form galaxies within dark–matter halos, have provided a more realistic connection ..... developing physically motivated bias models (e.g. [58, 54, 59]). 4. ..... phenomenological fit of the REFLEX power spectrum with a ...
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Relativistic effects and primordial non-Gaussianity in the galaxy bias
Apr 11, 2011 ... View the table of contents for this issue, or go to the journal homepage for ... large scale-dependent relativistic effects in the Eulerian bias arise ... Keywords: dark matter theory, cosmological perturbation theory ... Background (CMB) anisotropies and Large Scale Structure ..... motivated by other reasons.
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Dark energy - Particle Data Group
Feb 8, 2016 ... Although Einstein did not frame it this way, one can view the “ ... large-scale galaxy clustering, and direct estimates of the matter ... “dark energy” as a catch-all term for the origin of cosmic .... redshift-space distortion measurements of the structure growth rate . .... The possible phenomenology of modified.
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Reconstruction of the dark matter-vacuum energy interaction
supernovae and large scale structure. An evolving ... contain such a mechanism does not exist, this idea has motivated phenomenological models of decaying vacuum energy .... control the reconstruction bias by adding a prior that correlates ...
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The full shape of the large-scale galaxy power spectrum: modelling
4.6 Dark matter real and redshift space power spectra divided by a smooth reference ... 4.5 Theoretical and recovered large scale bias and Kaiser boost factors. ... the growth of structures as it influences the distribution of galaxies and gas at cosmological .... The basic idea of RPT is to reorganise all the contributions in the.
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Large Scale Structure Tests of Warm Dark Matter
The nature of the dark matter critically a ects the large scale structure of the Universe. ... (WDM) is an intriguing alternative from the point of view of both cosmology and .... In this section we motivate two prototype WDM candidates and show that .... phenomenology very similar to that of CDM, especially on the largest scales.
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Dark Energy Versus Modified Gravity - Annual Reviews
May 19, 2016 ... cosmology, dark energy, modified gravity, structure formation, large-scale ... their phenomenology and characteristic observable signatures in cosmology. .... for a major experimental effort using large-scale structure (LSS) surveys. ... There are many possible incarnations of this idea; what they share is the ...
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Fine Structure of Dark Energy and New Physics - VTechWorks
The proposal is motivated by a deep ... determines the large-scale structure of spacetime. ... We expect that the fluctuation about the zero value is biased towards the positive sign by ... We motivate our discussion of the spectral distribution of dark energy by an .... of view of the new physics advocated in the previous section.
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Coupled dark matter-dark energy in light of near Universe
the phenomenology of different classes of dark coupling models, paying ... the constraints from Cosmic Microwave Background (CMB), large scale structure ... The idea is that the virial theorem is modified by the energy exchange between the dark sectors leading to a bias in the estimation of the virial masses of clusters ...
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Evidence for Quadratic Tidal Tensor Bias from the Halo Bispectrum
Jan 23, 2012 ... Large Scale Structure (LSS), the large-scale distribution of matter in the ... potential wells of collapsed dark matter halos, where the hot gas can cool .... Motivation for a Lagrangian nature of halo bias comes from the peak model ..... From an observational point of view the halo auto bispectrum Bhhh is ...
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Large-Scale Structure of the Universe and Cosmological
Dec 27, 2001 ... Then, we consider the effects of the bias between .... Understanding the large scale structure of the Universe is one of the main ... tribution of luminous matter compared to that of the underlying dark ... an observational point of view (see however [607,160] for a review). .... We will simply motivate the results.
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