Results 121 to 130 of about 101,827 (259)
Young Extragalactic Radio Sources
, 1999 Gigahertz Peaked Spectrum (GPS) sources and Compact Symmetric Objects (CSO) are selected in very different ways, but have a significant overlap in properties. Ever since their discovery it has been speculated that they are young objects, but only recently, strong evidence has been provided indicating that GPS sources and CSOs are indeed the young ...
Snellen, Ignas, Schilizzi, Richard
openaire +2 more sources
Odd Radio Circles Modeled by Shock-bubble Interactions
The Astrophysical JournalThe physical nature and origins of the newly discovered class of Odd Radio Circles (ORCs) remain unclear. We investigate a model whereby ORCs are synchrotron-emitting vortex rings formed by the Richtmyer–Meshkov instability (RMI) when a shock interacts ...
Yiting Wang, Sebastian Heinz
doaj +1 more source
Intraday variability in compact extragalactic radio sources
, 2000 We present the data of three observing campaigns with the VLA performed to study intraday variability in compact extragalactic radio sources. The first campaign (May 1989) lasted 5 days; total intensity as well as linear polarization data were obtained ...
J. A. Zensus +8 more
core +1 more source
Extragalactic Radio Sources and CMB Anisotropies
, 2007 . Confusion noise due to extragalactic sources is a fundamental astrophysical limitation for experiments aimed at accurately determining the power spectrum of the Cosmic Microwave Background (CMB) down to arcmin angular scales and with a sensitivity ...
F. Argüeso +3 more
core
A Census of the Deep Radio Sky with the VLA. I. 10 GHz Survey of the GOODS-N Field
The Astrophysical JournalWe present the first high-resolution, high-frequency radio continuum survey that fully maps an extragalactic deep field: the 10 GHz survey of the Great Observatories Origins Deep Survey-North (GOODS-N) field. This is a Large Program of the Karl G. Jansky
Eric F. Jiménez-Andrade +6 more
doaj +1 more source
UniverseWe report the identification of an extremely rare and peculiar set of irregular radio sources, termed “STROMERSs” (STRange and Odd Morphology Extragalactic Radio Sources).ingThe irregular radio sources with very anomalous morphologies that make them ...
Soumen Kumar Bera +4 more
doaj +1 more source
Odessa Astronomical Publications, 2019 The paper examines data on the effects of the lunar tidal wave in the Earth 's upper atmosphere on the observed flux of radio sources. Monitoring of the fluxes of powerful galactic and extragalactic radio sources is carried out at the URAN-4 radio ...
M. I. Ryabov, L. I. Sobitnyak
doaj +1 more source
The Search for Very High Energy γ-rays from Misaligned AGN [PDF]
, 2013 The aim of this work is to study the potential for emission at very high energies (100 GeV) by misaligned active galactic nuclei (AGN) and the future prospects for observations of these objects with the next generation imaging atmospheric Cherenkov ...
CHEESEBROUGH, ALISTAIR
core
Letter to Nature: An ultra-relativistic outflow from a neutron star accreting gas from a companion.
, 2004 Collimated relativistic outflows—also known as jets—are amongst the most energetic phenomena in the Universe. They are associated with supermassive black holes in distant active galactic nuclei1, accreting stellar-mass black holes and neutron stars in ...
Johnston, H. +27 more
core +1 more source
A Multimechanism Hybrid Model of Peaked-spectrum Radio Sources
The Astrophysical JournalPeaked-spectrum (PS) sources exhibit turnover characteristics in their broad radio spectra. However, the mechanism underlying this phenomenon remains elusive.
Guang-Chen Sun +8 more
doaj +1 more source