Adapting a cryogenic sapphire oscillator for very long baseline interferometry
, 2011 Extension of very long baseline interferometry (VLBI) to observing wavelengths shorter than 1.3 mm provides exceptional angular resolution (∼20 μas) and access to new spectral regimes for the study of astrophysical phenomena. To maintain phase coherence
John G. Hartnett +11 more
core +1 more source
Crustal deformation at very long baseline interferometry sites due to seasonal air-mass and ground water variations [PDF]
, 1980 The seasonal deformation normal to the Earth's surface was calculated at stations involved or interested in very long baseline interferometry (VLBI) geodesy and at hypothetical sites in Australia and Brazil using global atmospheric pressure data, values ...
Larden, D. R., Stolz, A.
core
Blazar jets imaged with Very Long Baseline Interferometry (VLBI) - kinematics of helical trajectories in 3C273 and 3C345 [PDF]
In this work a large collection of VLBI (Very Long Baseline Interferometry) maps are presented based upon data from the VLBA (Very Long Baseline Array) for 29 sources. The maps are the result of three epochs of imaging. A kinematic study was undertaken with a view to understanding some interesting structure seen in the quasars 3C273 and 3C345 ...
openaire
First Very Long Baseline Interferometry Detections at 870 μm
The Astronomical JournalThe first very long baseline interferometry (VLBI) detections at 870 μ m wavelength (345 GHz frequency) are reported, achieving the highest diffraction-limited angular resolution yet obtained from the surface of the Earth and the highest-frequency ...
Alexander W. Raymond +278 more
doaj +1 more source
Sphero-Conical Modeling for the Estimation of Very Long Baseline Interferometry Invariant Point. [PDF]
Sensors (Basel), 2022 Bae TS, Hong CK.
europepmc +1 more source
Searching for coronal radio emission from protostars using very-long-baseline interferometry
, 2007 Aims.In order to directly study the role of magnetic fields in the immediate vicinity of protostars, we use Very-Long-Baseline Interferometry (VLBI), aiming at the detection of non-thermal centimetric radio emission.
J. Forbrich +4 more
core +1 more source
RadioAstron reveals a change in the jet collimation profile of 3C 84
Astronomy & AstrophysicsContext. Due to its brightness and proximity, the radio galaxy 3C 84 (optical counterpart NGC 1275 in the Perseus cluster) has been the target of extensive studies investigating the central parsec region of its active galactic nucleus.
Benke P. +7 more
doaj +1 more source
Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry
The Astrophysical JournalEvent Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez +5 more
doaj +1 more source
Automated Modeling with AAP-Imfit: Astrometry and Photometry via CASA
The Astrophysical JournalVery long baseline interferometry (VLBI) provides the highest-resolution radio intensity maps, crucial for detailed studies of compact sources like active galactic nuclei (AGNs) and their relativistic jets.
Alfredo Amador-Portes +5 more
doaj +1 more source