Dynamic Universe
نویسندگان
چکیده
منابع مشابه
Accelerating Universe with dynamic cosmological term Λ
Einstein equations have been solved for some specific dynamical models of the cosmological term Λ. Connecting the free parameters of the models with the cosmic matterand vacuumenergy density parameters it is shown that the models are equivalent. Using the selected models, present values of some of the physical parameters have been estimated and a glimpse of the past decelerating universe has al...
متن کاملHow to Summarize the Universe: Dynamic Maintenance of Quantiles
Order statistics, i.e., quantiles, are frequently used in databases both at the database server as well as the application level. For example, they are useful in selectivity estimation during query optimization, in partitioning large relations , in estimating query result sizes when building user interfaces, and in characterizing the data distribution of evolving datasets in the process of data...
متن کاملAccelerated expansion of the Universe driven by dynamic self - interaction
We establish a new model, which takes into account a dynamic (inertial) self-interaction of gravitating systems. The model is formulated by introduction of a new function depending on the square of the covariant derivative of the velocity four-vector of the system as a whole into the Lagrangian. This term is meant for description of both self-action of the system irregularly moving in the gravi...
متن کاملGott-Kaiser-Stebbins (GKS) effect in an accelerated expanding universe
Wewanttofindthecosmologicalconstantinfluenceoncosmicmicrowavebackground(CMB)temperatureduetomovinglinearcosmicstrings.Usingthespace-timemetricofalinearcosmicstringinanacceleratedexpandinguniverse,theGott-Kaiser Stebbins(GKS)effect,asanimportantmechanisminproducingtemperaturediscontinuityinthe(CMB),isconsidered;then,itsmodificationduetotheeffectofthecosmologicalconstantiscalculated.Theresultshowsthat...
متن کاملThe Anamorphic Universe the Anamorphic Universe
We introduce “anamorphic” cosmology, an approach for explaining the smoothness and flatness of the universe on large scales and the generation of a nearly scale-invariant spectrum of adiabatic density perturbations. The defining feature is a smoothing phase that acts like a contracting universe based on some Weyl frame-invariant criteria and an expanding universe based on other frame-invariant ...
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: Nature
سال: 2005
ISSN: 0028-0836,1476-4687
DOI: 10.1038/4351033a