نتایج جستجو برای: planck
تعداد نتایج: 14843 فیلتر نتایج به سال:
We consider a system of Brownian particles with long-range interactions. We go beyond the mean field approximation and take fluctuations into account. We introduce a new class of stochastic Fokker-Planck equations associated with a generalized thermodynamical formalism. Generalized thermodynamics arises in the case of complex systems experiencing small-scale constraints. In the limit of short-r...
Abstract We provide the first combined cosmological analysis of South Pole Telescope (SPT) and Planck cluster catalogs. The aim is to an independent calibration for scaling relations, exploiting constraining power SPT-SZ catalog its dedicated weak lensing (WL) X-ray follow-up observations. build a new version likelihood. In ν Λ CDM scenario, focusing on mass slope bias we find <?CDATA ${\alpha ...
We use Planck data to detect the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) effect and the infrared emission from the galaxies that make up the the cosmic infrared background (CIB). We first perform a stacking analysis towards Planck-confirmed galaxy clusters. We detect infrared emission produced by dusty galaxies inside these clusters and demonstrate that the infrared emissi...
On the accuracy of the Fokker-Planck and Fermi pencil beam equations for charged particle transport.
Electron beam dose calculations are often based on pencil beam formulas such as the Fermi-Eyges formula. The Fermi-Eyges formula gives an exact solution of the Fermi equation. The Fermi equation can be derived from a more fundamental mathematical model, the linear Boltzmann equation, in two steps. First, the linear Boltzmann equation is approximated by the Fokker-Planck equation. Second, the Fo...
The Planck Early Release Compact Source Catalogue (ERCSC) includes nine lists of highly reliable sources, individually extracted at each of the nine Planck frequency channels. To facilitate the study of the Planck sources, especially their spectral behaviour across the radio/infrared frequencies, we provide a “bandmerged” catalogue of the ERCSC sources. This catalogue consists of 15191 entries,...
The interaction of radio-frequency waves with a plasma is described by a Fokker–Planck equation with an added quasilinear term. Methods for solving this equation on a computer are discussed. Presented at the 3rd European Workshop on Problems in the Numerical Modeling of Plasmas, Varenna, Italy, September 10–13, 1985. Reprinted in Problems in the Numerical Modeling of Plasmas, edited by K. Apper...
in the planning of experiments. " We need to develop ways of better training researchers in methodology to avoid this, " he said. Sir David Weatherall, founding director of the Weatherall Institute of Molecular Medicine at Oxford University, said: " For medicine it's a way of life to be supported by the pharmaceutical industry. If you've been looked after by these people, unconscious bias is da...
Aims. Accurate measurement of the cosmic microwave background (CMB) anisotropy requires precise knowledge of the instrument beam. We explore how well the Planck beams will be determined from observations of planets, developing techniques that are also appropriate for other experiments. Methods. We simulate planet observations with a Planck-like scanning strategy, telescope beams, noise, and det...
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