Modified gravity and large scale flows, a review
نویسندگان
چکیده
منابع مشابه
The Gravity Model and Iran's Trade Flows
This article has considered the volume and direction of Iran’s trade using the gravity model. The major issue in this analysis is to explore why Iran over or under-traded with the 76 countries relative to the predicted trade flows of the model. The study attempts to explore the reasons from the respect of both the model itself and Iran’s trade structure. This is done by analysing the performanc...
متن کاملLarge-scale Flows as a Cosmological Probe
We review the use of peculiar velocities of galaxies as a probe of cosmological models. We put particular emphasis on comparison of the peculiar velocity and density fields, focussing on the discrepancies between various recent analyses. We discuss the limitations of the commonly used linear bias model, which may lie at the heart of some of the current controversies in the field.
متن کاملGravity and Large-Scale Nonlocal Bias
For Gaussian primordial fluctuations the relationship between galaxy and matter overdensities, bias, is most often assumed to be local at the time of observation in the large-scale limit. This hypothesis is however unstable under time evolution, we provide proofs under several (increasingly more realistic) sets of assumptions. In the simplest toy model galaxies are created locally and linearly ...
متن کاملA HYBRID MODIFIED GENETIC-NELDER MEAD SIMPLEX ALGORITHM FOR LARGE-SCALE TRUSS OPTIMIZATION
In this paper a hybrid algorithm based on exploration power of the Genetic algorithms and exploitation capability of Nelder Mead simplex is presented for global optimization of multi-variable functions. Some modifications are imposed on genetic algorithm to improve its capability and efficiency while being hybridized with Simplex method. Benchmark test examples of structural optimization with a...
متن کاملCold Flows and Large Scale Tides
We propose a different view of the dilemma concerning the coldness of the local cosmic flow and its repercussions for the global Universe. We stress the fact that our cosmic neighbourhood embodies a region of rather particular circumstances, whose dynamics and kinematics are substantially influenced by its location in between the Great Attractor region and the Pisces-Perseus chain. On the basis...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2017
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-017-3005-3