Results 21 to 30 of about 93,637 (312)
Symposium - International Astronomical Union, 1981 SummaryThe observational data on the radio properties of compact radio sources are presented, including their radio spectra, their occurence, and their structures, as well as the variations of the structures in the “superluminal” sources.
K. I. Kellermann, I. I. K. Pauliny-Toth
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Classical and Relativistic Evolution of an Extra-Galactic Jet with Back-Reaction
Galaxies, 2018 We consider a turbulent jet that is moving in a Lane⁻Emden ( n = 5 ) medium. The conserved quantity is the energy flux, which allows finding, to first order, an analytical expression for the velocity and an approximate trajectory.
Lorenzo Zaninetti
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Superluminal Radio Sources [PDF]
Symposium - International Astronomical Union, 1988 There are now at least 23 radio sources in which apparent superluminal motion has been found. The effect is not limited to the “classic” examples like 3C 345, but is found in objects with a wide range of characteristic properties. We review the observations of the phenomenon and present an up-to-date list of the known superluminal sources.
Zensus, J. A., Pearson, T. J.
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The Counts of Radio Sources [PDF]
Symposium - International Astronomical Union, 1969 Following the advice of Professor Zel'dovich, I will begin with two platitudes – first, when we consider the implications of the counts of radio sources, we must look at all the counts of radio sources at all frequencies; second, when we attempt to evaluate the implications of the source counts, we should use proper cosmological models and not rely on ...
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A Comprehensive Observational Study of the FRB 121102 Persistent Radio Source
The Astrophysical Journal, 2023 FRB 121102 is the first fast radio burst to be spatially associated with a persistent radio source (QRS 121102), the nature of which remains unknown. We constrain the physical size of QRS 121102 by measuring its flux-density variability with the VLA from
Ge Chen, Vikram Ravi, Gregg W. Hallinan
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An Injection System for the CHIME/FRB Experiment
The Astronomical Journal, 2023 Dedicated surveys searching for fast radio bursts (FRBs) are subject to selection effects that bias the observed population of events. Software injection systems are one method of correcting for these biases by injecting a mock population of synthetic ...
Marcus Merryfield +21 more
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Symposium - International Astronomical Union, 1981 The understanding of the nature of strong radio emission associated with galaxies and quasars has significantly increased in the last five years. A large contribution to this increase has been obtained from the arcsec and milli-arcsec mapping of radio sources which show remarkable features.
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The Astrophysical Journal, 2023 Fast radio bursts (FRBs) are brief, energetic, typically extragalactic flashes of radio emission whose progenitors are largely unknown. Although studying the FRB population is essential for understanding how these astrophysical phenomena occur, such ...
Kaitlyn Shin +20 more
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The Astrophysical Journal, 2023 Among more than 800 known fast radio bursts (FRBs), only two, namely FRB 20121102A and FRB 20190520B, are confirmed to be associated with persistent radio sources (PRSs).
Xian Zhang +14 more
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Extended Radio Emission in the Perhipheral Regions of the Shapley Concentration Core
Galaxies, 2017 The Shapley Concentration (SC) is a galaxy supercluster (few tens of degrees) in the Local Universe (<z>∼0.048) which is currently undergoing cluster mergers and group accretion.
Tiziana Venturi +6 more
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