Speaker
Description
Very Long Baseline Interferometry (VLBI) plays a crucial role in resolving radio sources which are typically unresolved in large
area surveys, but tend to have variety of morphologies that include FR-II like radio sources. Such sources could be at an early stage of their evolution or alternatively, they may be at the end of their life-cycle and are small due to being frustrated by the host galaxy interstellar medium. Most studies to date have focused on either very young, compact radio sources or larger radio sources leaving the intermediate size scale radio sources poorly represented in the literature. in this paper we present a multi-frequency imaging of four FR-II-like sources with angular extents that are <3.4 kpc in size with the goal of determining their radio-spectral morphologies. We aim to understand whether the radio population in the mjive-20 survey contains a significant number of young
FR II precursors, or they are frustrated radio sources that would not evolve to become FR-IIs. We combine VLBI imaging, radio
spectral energy distributions, mid-infrared, and optical SDSS photometry to investigate the morphologies, spectral properties, and host galaxy environments of the four radio galaxies. This work highlights the importance of using high-resolution, multi-band imaging to probe the early evolution of these radio galaxies and constrain the physical conditions that shape the growth of these radio galaxies
| Stream | Science or Engineering |
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