Results 11 to 20 of about 56,169 (259)
Photon Mass and Very Long Baseline Interferometry [PDF]
International Journal of Modern Physics D, 2010 A relation between the photon mass, its frequency, $\nu$, and the deflection parameter, $\gamma$, determined by experimentalists (which characterizes the contribution of space curvature to gravitational deflection) is found. This amazing result allows us
Accioly A. +4 more
core +4 more sources
Introduction to very-long-baseline interferometry [PDF]
Proceedings of the IEEE, 1973 Long-baseline interferometry achieves high resolution by using two or more widely separated radio telescopes and recording video signals on magnetic tapes, which are later brought together and cross-correlated.
Cohen, Marshall H.
core +3 more sources
Terrestrial very-long-baseline atom interferometry: Workshop summary [PDF]
AVS Quantum ScienceThis document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom interferometer ...
S. Abend +252 more
semanticscholar +14 more sources
Very-long-baseline interferometry experiments [PDF]
1970 Antennas and Propagation Society International Symposium, 1970 VLB observations have been made at many wavelengths from 2.8 to 270 cm. The highest resolution was obtained on the Greenbank-Crimea baseline, 2.9 x 10^8 wavelengths long at 2.8 cm on which two quasars showed interference fringes.
Cohen, M. H.
core +3 more sources
Space very long baseline interferometry in China [PDF]
Advances in Space Research, 2019 Space Very Long Baseline Interferometry (VLBI) has unique applications in high-resolution imaging of fine structure of astronomical objects and high-precision astrometry, owing to the key long space-Earth or space-space baselines beyond the Earth's ...
T. An +21 more
semanticscholar +4 more sources
The Transformational Power of Frequency Phase Transfer Methods for ngEHT
Galaxies, 2023 (Sub) mm VLBI observations are strongly hindered by limited sensitivity, with the fast tropospheric fluctuations being the dominant culprit. We predict great benefits from applying next-generation frequency phase transfer calibration techniques for the ...
María J. Rioja +2 more
doaj +1 more source
Orbit Tomography of Binary Supermassive Black Holes with Very Long Baseline Interferometry [PDF]
Astrophysical Journal, 2021 In this work, we study how to infer the orbit of a supermassive black hole binary (SMBHB) by time-dependent measurements with very long baseline interferometry, such as the Event Horizon Telescope (EHT).
Yun Fang, Huan Yang
semanticscholar +1 more source
Black hole parameter estimation with synthetic very long baseline interferometry data from the ground and from space [PDF]
Astronomy & Astrophysics, 2021 Context. The Event Horizon Telescope (EHT) has imaged the shadow of the supermassive black hole in M 87. A library of general relativistic magnetohydrodynamics (GMRHD) models was fit to the observational data, providing constraints on black hole ...
F. Roelofs +7 more
semanticscholar +1 more source
Probing the solar corona with very long baseline interferometry. [PDF]
Nat Commun, 2014 AbstractUnderstanding and monitoring the solar corona and solar wind is important for many applications like telecommunications or geomagnetic studies. Coronal electron density models have been derived by various techniques over the last 45 years, principally by analysing the effect of the corona on spacecraft tracking.
Soja B, Heinkelmann R, Schuh H.
europepmc +7 more sources
Hybrid Very Long Baseline Interferometry Imaging and Modeling with themis [PDF]
Astrophysical Journal, 2020 Generating images from very long baseline interferometric observations poses a difficult, and generally not unique, inversion problem. This problem is simplified by the introduction of constraints, some generic (e.g., positivity of the intensity) and ...
A. Broderick +4 more
semanticscholar +1 more source