Results 41 to 50 of about 977,708 (130)
The giant radio source 0917+75: Origin and properties
Astronomy & AstrophysicsContext. Several author have studied the giant radio source GRS0917 + 75, but its origin remains unclear. Aims. This source is unusual, because of its large size and its location outside a rich cluster of galaxies.
Giovannini G. +13 more
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A Simulation Study of Low-power Relativistic Jets: Flow Dynamics and Radio Morphology of FR-I Jets
The Astrophysical JournalRadio galaxies are classified into two primary categories based on their morphology: center-brightened FR-I and edge-brightened FR-II. It is believed that the jet power and interactions with the ambient medium govern the deceleration and decollimation of
Ayan Bhattacharjee +3 more
doaj +1 more source
On the relation between Fanaroff-Riley types I and II radio galaxies
The Astrophysical Journal, 1993 Recent optical observations of radio galaxies reveal a transition from F-R II morphology to F-R I morphology with increasing optical luminosity at fixed radio luminosity. This transition can occur if a highly supersonic jet which normally fuels F-R II sources is instead strongly decelerated near the nucleus, producing the transonic or subsonic flow ...
openaire +1 more source
Very Large Array imaging of five Fanaroff-Riley II 3CR radio galaxies
The Astronomical Journal, 1993 This paper presents high resolution, high dynamic range Very Large Array (VLA) radio images of five luminous classical double radio galaxies (RGs) at 5 GHz. We detect the radio cores of at least four of these RGs. A long, continuous radio jet is seen only in one source, 3C 22, in contrast to the 100% jet detection in a comparable sample of QSRs ...
Ilias Fernini +3 more
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Optical polarimetry studies of Seyfert galaxies [PDF]
, 1999 Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
core
Structures of the magnetoionic media around the Fanaroff-Riley Class I radio galaxies 3C 31 and Hydra A [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We use high-quality Very Large Array (VLA) images of the Fanaroff-Riley Class I radio galaxy 3C 31 at six frequencies in the range 1365-8440 MHz to explore the spatial scale and origin of the rotation measure (RM) fluctuations on the line of sight to the radio source.
R. A. Laing +3 more
openaire +1 more source
Identification of Large-scale (>100 kpc) Radio Jets in Narrow-line Seyfert 1 Galaxies
The Astrophysical JournalPowerful, large-scale relativistic jets are usually associated with massive, old elliptical galaxies. This paradigm has recently been challenged by the identification of narrow-line Seyfert 1 (NLSy1) galaxies, thought to be young active galactic nuclei ...
S. Umayal +5 more
doaj +1 more source
Model Spectrum of Ultrahigh-energy Cosmic Rays Accelerated in FR-I Radio Galaxy Jets
The Astrophysical JournalNearby radio galaxies (RGs) of Fanaroff–Riley Class I (FR-I) are considered possible sites for the production of observed ultrahigh-energy cosmic rays (UHECRs). Among those, some exhibit blazar-like inner jets, while others display plume-like structures.
Jeongbhin Seo, Dongsu Ryu, Hyesung Kang
doaj +1 more source
QUINTESSENCE, COSMOLOGY, AND FANAROFF-RILEY TYPE IIb RADIO GALAXIES
, 2001 Fanaroff-Riley type IIb (FR IIb) radio galaxies provide a modified standard yardstick that allows con-straints to be placed on global cosmological parameters.
Erick J. Guerra, Ruth A. Daly
core
Optical nuclei of radio-loud AGN and the Fanaroff-Riley divide
, 2004 We investigate the nature of the point-like optical nuclei that have been found in the centres of the host galaxies of a majority of radio galaxies by the Hubble Space Telescope.
P. Kharb, P. Shastri
core +1 more source