Results 21 to 30 of about 84,680 (165)
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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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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Equipartition Jet Model for the Seyfert 1 Galaxy 3C120 [PDF]
Journal of Astronomy and Space Sciences, 2003 The motion of 3C120 Jet relative to the core is reasonably uniform and the VLBI scale jet connects outwards to a VLA ˜ 100 kpc scale. We measured the jet width variation from the center and found some indication of a power law which indicates the jet ...
Siek Hyung
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Interpreting the clustering of radio sources [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 7 pages latex, 6 figures, to appear in MNRAS, replaced version corrects typo in expression for w(theta)
Cress, C. M., Kamionkowski, M.
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Compact radio sources: Triggering and feedback
Astronomische Nachrichten, 2021 AbstractCSS/GPS objects represent a key stage in the evolution of powerful radio AGN in which the jets are expanding through the denser, kpc‐scale ISM in the host galaxies. Therefore, it is important both to understand how such radio AGN are triggered as galaxies evolve and to directly quantify the impact of the outflows induced by the jet‐cloud ...
Clive Tadhunter +3 more
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Redshifts of CLASS Radio Sources [PDF]
The Astronomical Journal, 2000 Spectroscopic observations of a sample of 42 flat-spectrum radio sources from the Cosmic Lens All-Sky Survey (CLASS) have yielded a mean redshift of $ = 1.27$ with an RMS spread of 0.95, at a completeness level of 64%. The sample consists of sources with a 5-GHz flux density of 25-50 mJy, making it the faintest flat-spectrum radio sample for which the ...
Marlow, DR +5 more
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Radio source extraction with ProFound [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 21 pages, 17 figures.
Hale, C +5 more
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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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Radio loudness and classification for radio sources
Publications of the Astronomical Society of Japan, 2021 Abstract The extragalactic radio sources are divided into two subclasses (radio-loud and radio-quiet sources) in the literature using radio loudness (R), which is defined as the ratio of radio emission to optical emission, but the boundary R-value separating the two classes is different in various sources.
Lixia Zhang, Junhui Fan, Jingtian Zhu
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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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