Results 1 to 10 of about 1,075,291 (208)
The Origin and Evolution of Giant Radio Galaxies [PDF]
Frontiers in Astronomy and Space Sciences, 2022 Giant radio galaxies are arguably the least understood of jetted active galactic nuclei (AGN). We propose that radio galaxies are the product of large mergers that do not involve radio galaxies or radio quasars, such as in merging spiral galaxies, while ...
David Garofalo
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Search and analysis of giant radio galaxies with associated nuclei (SAGAN)
Astronomy & AstrophysicsContext. Giant radio galaxies (GRGs) represent the largest individual astrophysical structures, rivalling galaxy clusters in physical extent. Understanding how they attain such scales demands an examination of their large-scale cosmic surroundings ...
Mahato Mousumi +4 more
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ENVIRONMENT DENSITY OF A GIANT RADIO STRUCTURE FOR GALAXIES AND QUASARS WITH STEEP RADIO SPECTRA [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: Estimate of the environment density of giant (with the linear size of about megaparsec) radio structures for galaxies and quasars with steep low-frequency spectra taken from the UTR-2 catalogue. Study of the cosmological evolution of environment
A. P. Miroshnichenko
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Viewing Classical Radio Galaxies with the Upgraded GMRT and MeerKAT—A Progress Report
Galaxies, 2021 We present a progress report of a study of FR I and FR II radio galaxies. Several new morphological features in the radio emission are now revealed using the high (μJy) sensitivity reached in the range 550–1712 MHz, more than a factor of three, at the ...
Dharam V. Lal +12 more
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Cosmic ray acceleration to ultrahigh energy in radio galaxies [PDF]
EPJ Web of Conferences, 2019 The origin of ultrahigh energy cosmic rays (UHECRs) is an open question. In this proceeding, we first review the general physical requirements that a source must meet for acceleration to 10-100 EeV, including the consideration that the shock is not ...
Matthews James H. +3 more
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Discovery of 178 Giant Radio Galaxies in 1059 deg2 of the Rapid ASKAP Continuum Survey at 888 MHz
Galaxies, 2021 We report the results of a visual inspection of images of the Rapid ASKAP Continuum Survey (RACS) in search of extended radio galaxies (ERG) that reach or exceed linear sizes on the order of one Megaparsec. We searched a contiguous area of 1059 deg2 from
Heinz Andernach +2 more
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A Quick Look at the 3 GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
The Astrophysical Journal Supplement Series, 2023 Active galactic nuclei (AGNs) can often be identified in radio images as two lobes, sometimes connected to a core by a radio jet. This multicomponent morphology unfortunately creates difficulties for source finders, leading to components that are (a ...
Yjan A. Gordon +11 more
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RELATIONS OF STRUCTURE COMPONENTS OF GIANT RADIO SOURCES
Odessa Astronomical Publications, 2016 Our previous estimates of physical parameters of galaxies and quasars with steep radio spectrum have showed their great radio luminosity and giant radio structure.
A. P. Miroshnichenko
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To the problem of the secondary CMB anisotropy separation
EPJ Web of Conferences, 2016 We study contribution to the secondary anisotropy maps of cosmic microwave background (CMB) radiation which difficult to account for faint sources. Two effects are investigated.
Verkhodanov Oleg +3 more
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Relativistic jets in narrow-line Seyfert 1 galaxies. New discoveries and open questions
EPJ Web of Conferences, 2013 Before the launch of the Fermi satellite only two classes of AGNs were known to produce relativistic jets and thus emit up to the γ-ray energy range: blazars and radio galaxies, both hosted in giant elliptical galaxies.
D’Ammando F. +4 more
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