Results 1 to 10 of about 33,256 (184)
Sphero-Conical Modeling for the Estimation of Very Long Baseline Interferometry Invariant Point [PDF]
Sensors, 2022 A geodetic reference frame is a fundamental element in geoinformation fields such as autonomous navigation and digital twins. The international terrestrial reference frame is established and maintained using several space-geodetic techniques, including ...
Tae-Suk Bae, Chang-Ki Hong
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PHOTON MASS AND VERY LONG BASELINE INTERFEROMETRY [PDF]
, 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
ANTONIO ACCIOLY +2 more
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Scintillation Properties of PSR B1133+16 Measured with Very Long Baseline Interferometry
The Astrophysical JournalThe scintillation of pulsars reveals the small-scale structure of the interstellar medium. A powerful technique for characterizing the scintillating structures (screens) combines analysis of scintillation arcs and very long baseline interferometry (VLBI).
Ashley M. Stock +5 more
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A very long baseline interferometry sky survey [PDF]
, 1980 A systematic very long baseline interferometry (VLBI) sky survey, undertaken to find a suitable set of compact celestial radio sources from which a more complete VLBI reference frame can be constructed, discussed.
R. A. Preston, D. D. Morabito
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Astronomy using basic Mark 2 very long baseline interferometry [PDF]
, 1980 Two experiments were performed in April and September 1976 to determine precise positions of radio sources using conventional Mark 2 VLBI techniques. Four stations in the continental United States observed at a wavelength of 18 cm.
J. H. Spencer +3 more
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High-Redshift Quasars at z ≥ 3—III: Parsec-Scale Jet Properties from Very Long Baseline Interferometry Observations [PDF]
UniverseHigh-redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties of 86 radio-loud quasars at z ≥ 3 using very long baseline interferometry (
Shaoguang Guo +7 more
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The Astrophysical JournalWe present an investigation of the compact structure of the active galactic nucleus 2021+317 based on multiepoch very long baseline interferometry (VLBI) observations at 15, 22, and 43 GHz in the period from 2013 through 2024. The VLBI images show a core–
Haitian Shang +6 more
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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
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High-sensitivity Beamformed Observations of the Crab Pulsar's Radio Emission
The Astrophysical Journal, 2023 We analyzed four epochs of beamformed European VLBI Network data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even the faint high-frequency components in the folded ...
Rebecca Lin, Marten H. van Kerkwijk
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The Astrophysical Journal, 2023 Studying a centi-parsec supermassive black hole binary (SMBHB) would allow us to explore a new parameter space in active galactic nuclei, and these objects are also potential sources of gravitational waves.
Wu Jiang +8 more
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