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arXiv 0903.3838astro-ph.CO
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低亮度致密源综述

A survey of Low Luminosity Compact sources

Magdalena Kunert-Bajraszewska, Peter Thomasson

摘要:

根据FIRST星表和SDSS星表,构造了一个1.4GHz射电光度低于10^26 [W/Hz]的弱紧凑陡谱(CSS)源的通量密度限制样本。我们之前对CSS源的多频观测表明,低光度的小尺度物体可能是紧凑型推子的强有力候选者。这一发现支持了这样一种观点,即一些小尺寸的射电源是由于缺乏显著的燃料而存在时间很短的现象。它们永远不会“长大”成为FRI或FRII对象。这一新样本标志着对低光度致密天体(LLC)群体的无线电特性和形态进行系统研究的开始。对这个新样品的调查也应该会导致对紧凑型推子的更好理解。本文介绍了新项目的第一阶段--对44个低光度CSS源进行L波段MERLIN观测的结果。

英文摘要:

Based on the FIRST and SDSS catalogues a flux density limited sample of weak Compact Steep Spectrum (CSS) sources with radio luminosity below 10^26 [W/Hz] at 1.4 GHz has been constructed. Our previous multifrequency observations of CSS sources have shown that low luminosity small-scale objects can be strong candidates for compact faders. This finding supports the idea that some small-size radio sources are short-lived phenomena because of a lack of significant fuelling. They never 'grow up' to become FRI or FRII objects. This new sample marks the start of a systematical study of the radio properties and morphologies of the population of low luminosity compact (LLC) objects. An investigation of this new sample should also lead to a better understanding of compact faders. In this paper, the results of the first stage of the new project - the L-band MERLIN observations of 44 low luminosity CSS sources are presented.

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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