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arXiv 2008.05276astro-ph.IM
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射电源的最优概率星表匹配

Optimal Probabilistic Catalogue Matching for Radio Sources

Dongwei Fan, Tamás Budavári, Ray P. Norris, Amitabh Basu

摘要:

从无线电巡天的星表到其他波长的源星表的交叉匹配是非常困难的,因为无线电源通常是扩展的,通常由几个空间分离的分量组成,并且通常没有无线电分量与光学/红外主星系重合。传统上,交叉匹配是通过眼睛来完成的,但这并不能扩展到下一代无线电调查所期望的数百万个无线电源。我们提出了一个创新的自动化程序,使用贝叶斯假设检验,该模型试验放射源的形态与假定的位置的主机星系。这种新算法与早期版本的不同之处在于,它允许更复杂的射电源形态,并在大范围内同时进行拟合。我们表明,这种技术在无监督模式下表现良好。

英文摘要:

Cross-matching catalogues from radio surveys to catalogues of sources at other wavelengths is extremely hard, because radio sources are often extended, often consist of several spatially separated components, and often no radio component is coincident with the optical/infrared host galaxy. Traditionally, the cross-matching is done by eye, but this does not scale to the millions of radio sources expected from the next generation of radio surveys. We present an innovative automated procedure, using Bayesian hypothesis testing, that models trial radio-source morphologies with putative positions of the host galaxy. This new algorithm differs from an earlier version by allowing more complex radio source morphologies, and performing a simultaneous fit over a large field. We show that this technique performs well in an unsupervised mode.

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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