Most massive galaxies are now thought to go through an Active Galactic Nucleus (AGN) phase one or more times. Yet, the cause of triggering and the variations in the intrinsic and observed properties of AGN population are still poorly understood. Young, compact radio sources associated with accreting supermassive black holes (SMBHs) represent an important phase in the life cycles of jetted AGN for understanding AGN triggering and duty cycles. The superb sensitivity and resolution of the ngVLA, coupled with its broad frequency coverage, will provide exciting new insights into our understanding of the life cycles of radio AGN and their impact on galaxy evolution. The high spatial resolution of the ngVLA will enable resolved mapping of young radio AGN on sub-kiloparsec scales over a wide range of redshifts. With broad continuum coverage from 1.2 to 116 GHz, the ngVLA will excel at estimating ages of sources as old as 30-40 Myr at z ∼ 1. In combination with lower-frequency (ν < 1 GHz) instruments such as ngLOBO and the Square Kilometre Array, the ngVLA will robustly characterize the spectral energy distributions of young radio AGN.
Science with a Next Generation Very Large Array
- Pub Date:
- December 2018
- Astrophysics - Astrophysics of Galaxies
- 8 pages, 3 figures, To be published in the ASP Monograph Series, "Science with a Next-Generation VLA" , ed. E. J. Murphy (ASP, San Francisco, CA). arXiv admin note: text overlap with arXiv:1803.02357