Exploring AGN Activity over Cosmic Time with the SKA

Exploring AGN Activity over Cosmic Time with the SKA
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使用 SKA 探索宇宙时间内活动星系核的活动

DOI:
10.22323/1.215.0069
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发表时间:
2015
期刊:
arXiv: Astrophysics of Galaxies
影响因子:
--
通讯作者:
A. Karim
A. Karim
中科院分区:
--
文献类型:
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作者:
V. Smolčić;P. Padovani;J. Delhaize;I. Prandoni;N. Seymour;M. Jarvis;J. Afonso;M. Magliocchetti;M. Huynh;Mattia Vaccari;A. Karim

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在本章中,我们提出了在研究活动星系核活动的背景下,利用SKA进行广泛而深入的调查的动机。在1 GHz下,1年内1,000 - 5,000 deg^2 $的均方根值降至1 $\mu$Jy/梁(宽层带1/2),均方根值在2000小时内下降到200 nJy/梁,超过10 - 30 deg$^2$(深层带1/2),这些巡天将直接探测微弱的射电强活动星系核和射电静活动星系核(在z=6时,射电光度低至1 GHz,约为2 W/Hz)。这将使我们能够第一次对射电活动星系核活动到宇宙黎明($z\gtrsim6$)的宇宙演化进行详细研究,涵盖所有环境密度。
In this Chapter we present the motivation for undertaking both a wide and deep survey with the SKA in the context of studying AGN activity across cosmic time. With an rms down to 1 $\mu$Jy/beam at 1 GHz over 1,000 - 5,000 deg$^2$ in 1 year (wide tier band 1/2) and an rms down to 200 nJy/beam over 10 - 30 deg$^2$ in 2000 hours (deep tier band 1/2), these surveys will directly detect faint radio-loud and radio-quiet AGN (down to a 1 GHz radio luminosity of about $2\times10^{23}$ W/Hz at $z=6$). For the first time, this will enable us to conduct detailed studies of the cosmic evolution of radio AGN activity to the cosmic dawn ($z\gtrsim6$), covering all environmental densities.