脉冲星射电辐射散射的测量。银河系附近大尺度等离子体湍流的统计均匀性

Q4 Physics and Astronomy

Astronomical and Astrophysical Transactions Pub Date : 2007-12-13 DOI:10.1080/10556790701610282

A. D. Kuz’min, B. Losovsky

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引用次数: 12

摘要

我们报告了在银河系经度从6°到311°，距离达3 kpc的广阔星系区域的100颗脉冲星的大样本散射脉冲增宽τsc的低频测量。分析了τsc与频率、色散量、距离和银河系经度的关系。散射与频率的关系可以用低功率关系τsc(ν)∝ν−γ表示，γ=4.1±0.3。在距离为3 kpc的范围内，散射与色散测量的相关性可以用低功率关系τsc(DM)∝DM2.2±0.1来表示。在近星系的不同方向和距离上，湍流水平几乎相同，证明了该星系区域大规模等离子体湍流的统计均匀性。

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Measurements of the scattering of pulsars radio emission. Statistical uniformity of large-scale plasma turbulence in the near Galaxy

We report the low frequency measurements of the scatter pulse broadening τsc for a large sample of 100 pulsars in a vast Galaxy region of galactic longitudes from 6° to 311° and distances up to 3 kpc. Analysis of τsc dependencies on the frequency, dispersion measure, distance and Galactic longitude have been done. The scatter to frequency dependence can be presented by the power-low relation τsc(ν) ∝ ν−γ with γ=4.1±0.3. Up to a distance of 3 kpc the scatter to dispersion measure dependence can be presented by the power-low relation τsc(DM) ∝ DM2.2±0.1. The turbulence level is nearly identical in various directions and distances of the near Galaxy, testifying to the statistical homogeneity of a large-scale plasma turbulence in this Galaxy region.

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来源期刊

Astronomical and Astrophysical Transactions Physics and Astronomy-Instrumentation

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： Astronomical and Astrophysical Transactions (AApTr) journal is being published jointly by the Euro-Asian Astronomical Society and Cambridge Scientific Publishers, The journal provides a forum for the rapid publication of material from all modern and classical fields of astronomy and astrophysics, as well as material concerned with astronomical instrumentation and related fundamental sciences. It includes both theoretical and experimental original research papers, short communications, review papers and conference reports.