搜索结果: 31-45 共查到“天文学 cosmology”相关记录53条 . 查询时间(0.012 秒)
The Atacama Cosmology Telescope: Sunyaev Zel'dovich Selected Galaxy Clusters at 148 GHz in the 2008 Survey
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We report on twenty-three clusters detected blindly as Sunyaev-Zel'dovich (SZ) decrements in a 148 GHz, 455 square-degree map of the southern sky made with data from the Atacama Cosmology Telescope 20...
The Atacama Cosmology Telescope: Cosmology from Galaxy Clusters Detected via the Sunyaev-Zel'dovich Effect
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We present constraints on cosmological parameters based on a sample of Sunyaev-Zel'dovich-selected galaxy clusters detected in a millimeter-wave survey by the Atacama Cosmology Telescope.
QUBIC: The QU Bolometric Interferometer for Cosmology
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2010/12/23
One of the major challenges of modern cosmology is the detection of B-mode polarization anisotropies in the CMB. These originate from tensor fluctuations of the metric produced during the inflationary...
Observational constraints on Galileon cosmology
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th)
2010/12/23
We study the cosmology of a covariant Galileon field with five covariant Lagrangians and confront this theory with the most recent cosmological probes: the type Ia supernovae data (Constitution and Un...
Cosmology in One Dimension:Fractal Geometry, Power Spectra and Correlation
One Dimension Fractal Geometry Power Spectra
2010/4/6
Concentrations of matter, such as galaxies and galactic clusters, originated as very small density fluctuations in the early universe. The existence of galaxy clusters and super-clusters suggests that...
Quantum Cosmology Close to the Classical Big Bang Singularity and in the Semiclassical Limit
Quantum Cosmology Semiclassical Limit Big Bang Singularity
2010/3/18
We investigate a cosmological model whose energy content is described by a Chaplygin gas represented by a scalar field $\phi$ with an associated potential producing a big bang singularity such that fo...
In this paper we investigate the power spectrum of thermal fluctuations in very early stage of viscous cosmology. When the state parameter as well as the viscous coefficient of a barotropic fluid is p...
Modified F(R) Horava-Lifshitz gravity: a way to accelerating FRW cosmology
Horava-Lifshitz gravity FRW cosmology
2010/3/19
Masud Chaichian, Shin'ichi Nojiri, Sergei D. Odintsov, Markku Oksanen, Anca Tureanu
(Submitted on 22 Jan 2010 (v1), last revised 14 Mar 2010 (this version, v2))
Abstract: We propose a general approa...
Reheating in Inflationary Cosmology: Theory and Applications
Inflationary Cosmology Reheating Applications
2010/3/19
Reheating is an important part of inflationary cosmology. It describes the production of Standard Matter particles after the phase of accelerated expansion. We give a review of the reheating process, ...
The cosmological perturbation theory in loop cosmology with holonomy corrections
cosmological perturbation loop cosmology
2010/3/18
In this paper we investigate the scalar mode of first-order metric perturbations over spatially flat FRW spacetime when the holonomy correction is taken into account in the semi-classical framework of...
Quantum field theory, gravity and cosmology in a fractal universe
Fractal spacetime Models of Quantum Gravity Cosmology of Theories beyond the SM
2010/3/18
We propose a model for a power-counting renormalizable field theory living in a fractal spacetime. The action is Lorentz covariant and equipped with a Stieltjes measure. The system flows, even in a cl...
The Florida Image Slicer for Infrared Astrophysics and Cosmology
Florida Image Slicer Infrared Astrophysics Cosmology
2009/7/1
The Florida Image Slicer for Infrared Astrophysics and Cosmology。
Near-field cosmology with horizontal branch and rr lyrae stars
Near-field cosmology rr lyrae stars horizontal branch
2009/6/26
Near-field cosmology with horizontal branch and rr lyrae stars。
Cosmology and Structure Formation with the GTM and GTC
Cosmology Structure Formation the GTM
2009/6/12
Cosmology and Structure Formation with the GTM and GTC。
Cosmology with the GTC：A combined mm-optical galaxy cluster survey
Cosmology GTC mm-optical
2009/6/12
Cosmology with the GTC：A combined mm-optical galaxy cluster survey。