Zobrazeno 1 - 10
of 169
pro vyhledávání: '"Kegel, W."'
Publikováno v:
Astron.Astrophys. 406 (2003) 23-30
The microturbulent approximation of turbulent motions is widely used in radiative transfer calculations. Mainly motivated by its simple computational application it is probably in many cases an oversimplified treatment of the dynamical processes invo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0306035
We show that the difference between the Ar and Si relative abundance ratio derived from FUSE absorption spectra and from the HII regions of I Zw 18 is a consequence of the microturbulent analysis applied to the absorption spectra. FUSE observations w
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011513
A very low primordial deuterium abundance of D/H = 1.5 10^{-5} has recently been proposed by Molaro et al. in the Lyman limit system with log(N_HI) = 18.1 cm^{-2} at z_a = 3.514 towards the quasar APM08279+5255. The D/H value was estimated through th
Externí odkaz:
http://arxiv.org/abs/astro-ph/9911261
Publikováno v:
In Microelectronic Engineering 25 June 2017 178:262-265
A new method based on a Reverse Monte Carlo [RMC] technique and aimed at the inverse problem in the analysis of interstellar (intergalactic) absorption lines is presented. The line formation process in chaotic media with a finite correlation length $
Externí odkaz:
http://arxiv.org/abs/astro-ph/9712112
A new method, based on a Reverse Monte Carlo technique and aimed at the inverse problem in the analysis of interstellar (intergalactic) absorption lines is presented. We consider the process of line formation in media with a stochastic velocity field
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710122
Autor:
Levshakov, S. A., Kegel, W. H.
We show that spatial correlations in a stochastic large scale velocity field in an otherwise smooth intergalactic medium (homogeneous comoving density) superposed on the general Hubble flow, may cause a `line-like' structure in QSO spectra similar to
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710100
By using a Reverse Monte Carlo technique aimed at the inverse problem in the analysis of the H+D Ly-a absorption from QSO spectra we have estimated the physical parameters of the gas and the large-scale line of sight velocity structure towards Q1009+
Externí odkaz:
http://arxiv.org/abs/astro-ph/9708064
Autor:
Kegel, W. H., Levshakov, S. A.
We show that in stochastic large scale velocity fields superposed on the general Hubble flow, the formation of the GP-depression in QSO spectra is intimately related to the formation of the absorption-line structure usually called `Ly-alpha forest'.
Externí odkaz:
http://arxiv.org/abs/astro-ph/9708063
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