搜索结果: 1-15 共查到“天体物理学 approach”相关记录15条 . 查询时间(0.5 秒)
The enrichment history of the intracluster medium: a Bayesian approach
Galaxies:clusters:intraclustermedium-X-ray:galaxy clusters Methods:statistical-Galaxies:clusters:general-Cosmology:observation
2012/11/23
This work measures the evolution of the iron content in galaxy clusters by a rigorous analysis of the data of 130 clusters at 0.1ratio...
On the Ratio of Circumference to Diameter for the Largest Observable Circles: An Empirical Approach
On the Ratio of Circumference Diameter the Largest Observable Circles Empirical Approach Instrumentation and Methods for Astrophysics
2012/4/19
I present here a measurement of pi as determined for the largest observable circles. Intriguingly, the value of 16/5 asserted by the House of Representatives of the State of Indiana in 1897 is still v...
The colours of BL Lac objects: a new approach to their classification
galaxies:active:BL Lac objects
2012/2/23
We selected a sample of 437 BL Lac objects, taken from the RomaBZCat catalogue, for which spectroscopic information and SDSS photometry is available. We propose a new classification of BL Lacs in whic...
Abstract: We discuss the f(R) gravity model in which the origin of dark energy is identified as a modification of gravity. The Noether symmetry with gauge term is investigated for the f(R) cosmologica...
The cluster structure of the inner crust of neutron stars in the Hartree-Fock-Bogoliubov approach
cluster structure inner crust neutron stars approach
2011/10/17
We analyse how the structure of the inner curst is influenced by the pairing correlations. The inner-crust matter, formed by nuclear clusters immersed in a superfluid neutron gas and ultra-relativisti...
A possible approach to three-dimensional cosmic-ray propagation in the Galaxy IV. Electrons and electron-induced gamma-rays
three-dimensional cosmic-ray propagation the Galaxy IV. Electrons
2011/1/11
Based on the diffusion-halo model for cosmic-ray (CR) propagation, including stochastic reacceleration due to collisions with hydromagnetic turbulence, we study the behavior of the electron component ...
An iterative method in a probabilistic approach to the spectral inverse problem: Differential emission measure from line spectra and broadband data
the spectral inverse problem Differential emission measure
2011/1/11
Inverse problems are of great importance in astrophysics for deriving information about the physical characteristics of hot optically thin plasma sources from their EUV and X-ray spectra. We describe ...
Mode width fitting with a simple bayesian approach. Application to CoRoT targets HD 181420 and HD 49933
statistics detection data analysis asteroseismology
2010/11/15
Aims. We investigate the asteroseismology of two solar-like targets as observed with the CoRoT satellite, with particular attention paid to the mode fitting. HD 181420 and HD 49933 are typical CoRoT s...
Observational approach to the chemical evolution of high-mass binaries
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
The complexity of composite spectra of close binaries makes the study of the individual stellar spectra extremely difficult. For this reason there exists very little information on the chemical compos...
An Optimal Approach for Measuring the Integrated Sachs-Wolfe Effect
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
2010/12/28
One of the main challenges of modern cosmology is to understand the primordial fluctuations of the early Universe and the nature of the mysterious dark energy which causes the cosmic acceleration. The...
Spectrophotometric Redshifts. A New Approach to the Reduction of Noisy Spectra and its Application to GRB090423
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
We have developed a new method, close in philosophy to the photometric redshift technique, which can be applied to spectral data of very low signal-to-noise ratio. Using it we intend to measure redshi...
A Monte Carlo Approach to Evolution of the Far-Infrared Luminosity Function with BLAST
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We constrain the evolution of the rest-frame far-infrared (FIR) luminosity function out to z~3.5 by combining several pieces of complementary information provided by the deep Balloon-borne Large-Apert...
High Energy Cosmic-ray Diffusion in Molecular Clouds: A Numerical Approach
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/22
The propagation of high-energy cosmic rays through giant molecular clouds constitutes a fundamental process in astronomy and astrophysics. The diffusion of cosmic-rays through these magnetically turbu...
High Energy Cosmic-ray Diffusion in Molecular Clouds: A Numerical Approach
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/22
The propagation of high-energy cosmic rays through giant molecular clouds constitutes a fundamental process in astronomy and astrophysics. The diffusion of cosmic-rays through these magnetically turbu...
VISUAL BINARY ORBIT DETERMINATION. ONE POSSIBLE APPROACH
BINARY ORBIT ONE POSSIBLE APPROACH
2009/4/8
VISUAL BINARY ORBIT DETERMINATION. ONE POSSIBLE APPROACH。