Extragalactic megahertz-peaked spectrum radio sources at milliarcsecond scales [PDF]
Astronomy & Astrophysics, 2019 Extragalactic peaked-spectrum radio sources are thought to be the progenitors of larger, radio-loud active galactic nuclei (AGN). Synchrotron self-absorption (SSA) has often been identified as the cause of their spectral peak.
M. Keim, J. Callingham, H. Röttgering
semanticscholar +1 more source
CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources [PDF]
Astrophysical Journal, 2023 We present the discovery of 25 new repeating fast radio burst (FRB) sources found among CHIME/FRB events detected between 2019 September 30 and 2021 May 1.
Therese Andersen +56 more
semanticscholar +1 more source
The Second LBA Calibrator Survey of southern compact extragalactic radio sources – LCS2 [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present the second catalogue of accurate positions and correlated flux densities for 1100 compact extragalactic radio sources that were not observed before 2008 at high angular resolution. The catalogue spans the declination range -90 deg, -30 deg and
L. Petrov +4 more
semanticscholar +1 more source
Extragalactic Peaked-spectrum Radio Sources at Low Frequencies [PDF]
, 2017 We present a sample of 1483 sources that display spectral peaks between 72 MHz and 1.4 GHz, selected from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey.
J. Callingham +26 more
semanticscholar +1 more source
Global Millimeter VLBI Array Survey of Ultracompact Extragalactic Radio Sources at 86 GHz [PDF]
URSI Asia-Pacific Radio Science Conference, 2018 Very Long Baseline Interferometry (VLBI) observations at 86 GHz ($\sim 3$ mm) reach a resolution of about 50 micro arcsec and sample the scales as small as $10^{3}-10^{4}$ Schwarzschild radii of the central black hole in Active Galactic Nuclei (AGN), and
D. Nair +11 more
semanticscholar +1 more source
Unprecedented change in the position of four radio sources [PDF]
, 2022 Astrometric positions of radio-emitting active galactic nuclei (AGNs) can be determined with sub-milliarcsec accuracy using very long baseline interferometry (VLBI).
O. Titov +9 more
semanticscholar +1 more source
Planck intermediate results. XLV. Radio spectra of northern extragalactic radio sources [PDF]
, 2016 Continuum spectra covering centimetre to submillimetre wavelengths are presented for a northern sample of 104 extragalactic radio sources, mainly active galactic nuclei, based on four-epoch Planck data.
, Planck Collaboration
core +4 more sources
Associating Fast Radio Bursts with Extragalactic Radio Sources: General Methodology and a Search for a Counterpart to FRB 170107 [PDF]
Astrophysical Journal, 2018 The discovery of a repeating fast radio burst (FRB) has led to the first precise localization, an association with a dwarf galaxy, and the identification of a coincident persistent radio source.
T. Eftekhari +3 more
semanticscholar +1 more source
The 3CR Chandra Snapshot Survey: Extragalactic Radio Sources with 0.5 < z < 1.0 [PDF]
, 2018 This paper presents the analysis of Chandra X-ray snapshot observations of a subsample of the extragalactic sources listed in the revised Third Cambridge radio catalog (3CR), previously lacking X-ray observations and thus observed during Chandra Cycle 15.
F. Massaro +12 more
semanticscholar +1 more source
ALMA photometry of extragalactic radio sources [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The study acknowledges partial financial support by the Italian Ministero dell’Istruzione, Universita e Ricerca through the grant ‘Progetti Premiali 2012 – iALMA’ (CUP C52I13000140001).
M. Bonato +9 more
semanticscholar +1 more source