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arXiv 1809.01199astro-ph.GA
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ngVLA广域AGN调查

An ngVLA Wide Area AGN Survey

Allison Kirkpatrick, Kirsten Hall, Kristina Nyland, Mark Lacy, Isabella Prandoni

摘要:

下一代超大型阵列(ngVLA)将在$1-8$ GHz下具有前所未有的灵敏度和测绘速度。我们讨论如何活动星系核(AGN)社区可以受益于广域,中等深度ngVLA调查。我们提出了一个10度$^2$调查条纹82领域使用8 GHz频段与均方根深度的$1\,μ$ Jy波束$^{-1}$。我们将探测$\sim$ 130,000个星系,包括无线电安静的AGN到$z\sim7$。我们可以测量射电静和射电响活动星系核的亮度和空间密度演化。我们还可以通过使用交叉关联函数对两个种群进行聚类来度量活动星系核的演化。广域ngVLA调查将受益于现有的多波长活动星系核种群,特别是在条纹82领域,以及新一代光学和红外调查仪器,如LSST和WFIRST的新信息。

英文摘要:

The next generation Very Large Array (ngVLA) will have unprecedented sensitivities and mapping speeds at $1-8$ GHz. We discuss how the active galactic nuclei (AGN) community can benefit from a wide-area, medium depth ngVLA survey. We propose a 10 deg$^2$ survey in the Stripe 82 field using the 8 GHz band with an rms depth of $1\,μ$Jy beam$^{-1}$. We will detect $\sim$130,000 galaxies, including radio-quiet AGN out to $z\sim7$. We can measure the luminosity and space density evolution of radio-quiet and radio-loud AGN. We can also measure AGN evolution through clustering of both populations using cross-correlation functions. A wide area ngVLA survey will benefit from existing multiwavelength AGN populations, particularly in the Stripe 82 field, as well as new information from next-generation optical and infrared survey instruments such as LSST and WFIRST.

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