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arXiv 1805.05656astro-ph.GAastro-ph.COastro-ph.IM
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RCR星表射电源积分谱研究

Study of RCR Catalogue Radio Source Integral Spectra

Olga Zhelenkova, Elena Majorova

备注：
26 pages, 6 figures
发表信息：
Astrophysical Bulletin Vol. 73, 2018, 115-134
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摘要：

本文介绍了在赤经间隔$2^h$ < RA < $7^h$的1980- 1999年“冷”实验巡天的平均扫描上发现的源的特征。因此，完成了针对该间隔的RC目录源（RATAN冷）的参数的细化。到目前为止，RCR星表（RATAN Cold Refined）涵盖了赤经间隔$2^h$ < RA < $17^h$，包括830个源。用70- 230兆赫范围内的新数据建立了它们的光谱。讨论了在74和150 MHz，1.4，3.94和4.85 GHz频率下，谱指数$α_{0.5}$，$α_{3.94}$与积分通量密度之间的关系。我们发现，在150兆赫在大多数源的频谱指数$α_{0.5}$得到陡峭的通量密度增加。在一般情况下，具有平坦频谱的源在通量密度方面比具有陡峭频谱的源弱，这在150 MHz处尤其不同。我们认为这是由于它们的扩展分量的亮度，这可以通过吸积的类型和源的邻域来确定。

英文摘要：

We present the characteristics of the sources found on the averaged scans of the "Cold" experiment 1980--1999 surveys in the right-ascension interval $2^h$< RA <$7^h$. Thereby, a refinement of the parameters of the RC catalog sources (RATAN Cold) for this interval is complete. To date, the RCR catalog (RATAN Cold Refined) covers the right-ascension interval $2^h$< RA <$17^h$ and includes 830 sources. The spectra are built for them with the use of new data in the range of 70--230 MHz. The dependence between the spectral indices $α_{0.5}$, $α_{3.94}$ and integral flux density at the frequencies of 74 and 150 MHz, at 1.4, 3.94 and 4.85 GHz is discussed. We found that at 150 MHz in most sources the spectral index $α_{0.5}$ gets steeper with increasing flux density. In general, the sources with flat spectra are weaker in terms of flux density than the sources with steep spectra, which especially differs at 150 MHz. We believe that this is due to the brightness of their extended components, which can be determined by the type of accretion and the neighborhood of the source.

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