Results 51 to 60 of about 134,972 (304)
Depolarization of Extragalactic Radio Sources [PDF]
Symposium - International Astronomical Union, 1982 In the last decade correlations of the depolarization parameter λd with several parameters, i.e., the radio luminosity L, redshift z, and source size D have been investigated by several authors, where λd is the wavelength at which the percentage polarization drops to its half maximum. Kronberg ET AL.
M. Inoue, H. Tabara
openaire +1 more source
Fast Radio Bursts: An Extragalactic Enigma [PDF]
Annual Review of Astronomy and Astrophysics, 2019 We summarize our understanding of millisecond radio bursts from an extragalactic population of sources. Fast radio bursts (FRBs) occur at an extraordinary rate, thousands per day over the entire sky with radiation energy densities at the source about ten
J. Cordes, S. Chatterjee
semanticscholar +1 more source
An Old Fogey’s History of Radio Jets
Galaxies, 2017 This paper describes a personal view of the discovery of radio jets in celestial radio sources. The existence of narrow, collimated optical features in distant objects has been known about since the early 20th century; however, the advent of radio ...
Ralph Spencer
doaj +1 more source
Summing up Ultra-High-Energy Cosmic Rays from Radio Galaxies [PDF]
, 2018 Radio galaxies are intensively discussed as the sources of cosmic rays observed above about 3 EeV, called ultra-high-energy cosmic rays (UHECRs). Here, the key issues from a recent investigation are summed up, where the individual characteristics of ...
Eichmann, Björn
core +3 more sources
Radio Wavelength Constraints on the Sources of the Far Infrared Background [PDF]
, 1998 The cosmic far infrared background detected recently by the COBE-DIRBE team is presumably due, in large part, to the far infrared (FIR) emission from all galaxies.
Bridle A. H. +8 more
core +3 more sources
Long-term variability of extragalactic radio sources in the Planck Early Release Compact Source Catalogue [PDF]
, 2013 Combining measurements taken using the Wilkinson Microwave Anisotropy Probe(WMAP) from 2001 to 2008 with measurements taken using Planck from 2009 to 2010, we investigate the long-term flux density v ariability of extragalactic radio sources selected ...
Xun Chen +7 more
semanticscholar +1 more source
Optical and radio properties of giant radio quasars: Central black hole characteristics
, 2012 We analysed the optical and radio properties of lobe-dominated giant-sized (> 0.72 Mpc) radio quasars and compared the results with those derived for a sample of smaller radio sources to determine whether the large size of some extragalactic radio ...
Jamrozy, M., Kuźmicz, A.
core +1 more source
Binary black holes in nuclei of extragalactic radio sources [PDF]
, 2013 If we assume that nuclei of extragalactic radio sources contain binary black hole systems, the two black holes can eject VLBI components, in which case two families of di erent VLBI trajectories will be observed. Another important consequence of a binary
J. Roland +5 more
semanticscholar +1 more source
Multifrequency Studies of Active Galactic Nuclei in the Planck Satellite Era
Galaxies, 2016 The multi-epoch single-survey Planck satellite data have given a rare glimpse into how the radio spectra of active galactic nuclei (AGN) evolve in time.
Anne Lähteenmäki +1 more
doaj +1 more source
The Galactic Halo Contribution to the Dispersion Measure of Extragalactic Fast Radio Bursts [PDF]
Astrophysical Journal, 2019 A new model of the Milky Way (MW) halo component of the dispersion measure (DM) for extragalactic sources, such as fast radio bursts, is presented in light of recent diffuse X-ray observations. In addition to the spherical component of isothermal gas (kT
S. Yamasaki, T. Totani
semanticscholar +1 more source