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arXiv 0907.5581astro-ph.CO
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关于宇宙中标准杆的存在

On the existence of a standard rod in the Universe

I. N. Pashchenko, B. V. Komberg

摘要:

利用标准宇宙学模型,我们证明了用地基甚长基线干涉仪(VLBI)在毫角秒角尺度上观测到的超致密射电源核不能作为合理的线性尺度标准单位。在角分角尺度上,超致密射电源的“亮度-线性尺寸”关系与射电星系和类星体的“亮度-线性尺寸”关系具有不同的起源。这正是地基VLBI观测网无法分辨VLBI核和Malmquist偏差的表现。因此,致密射电源的核心不能作为“标准棒”,至少在地基VLBI提供的分辨率下是这样。这一结论说明了15 GHz VLBA样品的无线电源。

英文摘要:

Using standard cosmological model we show that the cores of ultra-compact radio sources observed with ground-based Very Long Baseline Interferometry (VLBI) on the angular scales of milliarcseconds cannot be used as a reasonable standard unit of linear size. "Luminosity - linear size" correlation obtained by many authors for ultra compact radio sources has different origin than that for the radio galaxies and quasars on the angular scales of arcminutes. It is just the manifestation of the fact that ground-based VLBI networks are unable to resolve VLBI-cores and the Malmquist bias presents. Thus, the cores of compact radio sources can't be used as "standard rods" at least with resolution offered by ground-based VLBI. This conclusion is illustrated on 15 GHz VLBA sample of radio sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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