Results 111 to 120 of about 4,973 (222)
BASS. XLVII. 22 GHz Radio Atlas of Swift-BAT Selected AGN
The Astrophysical JournalWe present the third phase of the largest high-frequency, high-resolution imaging survey of 231 nearby, hard X-ray selected active galactic nuclei (AGNs), with a very high 98% ± 1% detection fraction.
Macon Magno +18 more
doaj +1 more source
Measurement of Ultra-High Energy Cosmic Rays with CHICOS [PDF]
, 2009 The California HIgh school Cosmic ray ObServatory (CHICOS) is a ground-based scintillator array designed to measure the extended air showers of ultra-high energy cosmic rays. The goal of the project is to gain insight into the origin of ultra-high energy
Brobeck, Elina
core +1 more source
The Size of the Radio‐Emitting Region in Low‐Luminosity Active Galactic Nuclei
The Astrophysical Journal, 2005 61 pages, 17 figures, 10 tables.
Anderson, James M., Ulvestad, James S.
openaire +2 more sources
Prevalence of Compact Nuclear Radio Emission in Post-merger Galaxies and Its Origin
The Astrophysical JournalPost-merger galaxies are unique laboratories to study the triggering and interplay of star formation and active galactic nucleus (AGN) activity. Combining new, high-resolution Jansky Very Large Array (VLA) observations with archival radio surveys, we ...
Gregory Walsh, Sarah Burke-Spolaor
doaj +1 more source
Relation between radio core length and black hole mass for active galactic nuclei
, 2002 We explore the relation between the linear length of radio core and the central black hole mass for a sample of radio-loud active galactic nuclei (AGNs). An empirical relation between the size of the broad line region (BLR) and optical luminosity is used
Jiang, DR, Cao, XW
core
Quasars and active galactic nuclei: High resolution radio imaging [PDF]
, 1995 The 12th colloquium in the series organized by the National Academy of Sciences, Quasars and Active Galactic Nuclei: High Resolution Radio Imaging, was held at the NAS Beckman Center in Irvine, California, on March 24 and 25, 1995. The meeting brought
Cohen, Marshall H. +1 more
core
The Clustering of galaxies around radio-loud active galactic nuclei
, 2013 We examine the hypothesis that mergers and close encounters between galaxies can fuel active galactic nuclei (AGNs) by increasing the rate at which gas accretes toward the central black hole.
Beutler, Florian +6 more
core +1 more source
JWST NIRCam Imaging of NGC 4258. I. Observation Overview
The Astrophysical JournalWe present James Webb Space Telescope (JWST) Near-Infrared Camera imaging of the nearby Seyfert 1.9 galaxy NGC 4258, which hosts strong star formation regions as well as an anomalous jet-like radio structure that extends through a significant portion of ...
Travis C. Fischer +5 more
doaj +1 more source
Evidence for Toroidal B-Field Components in AGN Jets on Kiloparsec Scales
Galaxies, 2017 Though helical magnetic fields are generally believed to arise when the jets of Active Galactic Nuclei (AGN) are launched, it is still unclear what role they play (and if they survive) to the largest jet scales.
Sebastian Knuettel +2 more
doaj +1 more source
Low-luminosity active galactic nuclei: are they UV faint and radio loud? [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Low-luminosity AGNs are perceived to be radio loud and devoid of a ``big blue bump'', indicating a transition from a radiatively efficient, geometrically thin, accretion disc in high-luminosity AGNs, to a geometrically thick, radiatively inefficient accretion flow at low luminosities and accretion rates.
openaire +2 more sources