Detection statistics of the RadioAstron AGN survey
Y. Y. Kovalev, N. S. Kardashev, K. V. Sokolovsky, P. A. Voitsik, T., An, J. M. Anderson, A. S. Andrianov, V. Yu. Avdeev, N. Bartel, H. E. Bignall,, M. S. Burgin, P. G. Edwards, S. P. Ellingsen, S. Frey, C. Garcia-Miro, M. P., Gawronski, F. D. Ghigo, T. Ghosh, G. Giovannini
TL;DR
This paper presents detection statistics from the RadioAstron AGN survey, revealing that a significant portion of radio-strong AGN exhibit extremely compact core structures at multiple wavelengths, advancing understanding of AGN emission physics.
Contribution
It provides the first comprehensive detection statistics for a complete sample of radio-strong AGN on ground-space baselines, highlighting the prevalence of ultra-compact core structures.
Findings
Two-thirds of surveyed AGN are detected by RadioAstron.
Detected cores contain structures tens to hundreds of microarcseconds in size.
Survey results improve understanding of AGN core emission and scattering effects.
Abstract
The largest Key Science Program of the RadioAstron space VLBI mission is a survey of active galactic nuclei (AGN). The main goal of the survey is to measure and study the brightness of AGN cores in order to better understand the physics of their emission while taking interstellar scattering into consideration. In this paper we present detection statistics for observations on ground-space baselines of a complete sample of radio-strong AGN at the wavelengths of 18, 6, and 1.3 cm. Two-thirds of them are indeed detected by RadioAstron and are found to contain extremely compact, tens to hundreds of as structures within their cores.
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