Results 101 to 110 of about 33,325 (239)

VLBA Astrometry of the Galactic Double Neutron Stars PSR J0509+3801 and PSR J1930–1852: A Preliminary Transverse Velocity Distribution of Double Neutron Stars and its Implications

open access: yesThe Astrophysical Journal
The mergers of double neutron star (DNS) systems are believed to drive the majority of short γ -ray bursts (SGRBs), while also serving as production sites of heavy r -process elements.
Hao Ding   +5 more
doaj   +1 more source

Solar VLBI [PDF]

open access: yes
In April, 1981, radio telescopes at Dwingeloo (The Netherlands) and Onsala (Sweden) were used as a long-baseline interferometer at a wavelength of 18 cm. The baseline of 619 km gave a spatial resolution on the Sun of about 45 km.
Kuijpers, J., Tapping, K. F.
core   +1 more source

A Geodetic and Astrometric VLBI Experiment at 22/43/88/132 GHz

open access: yesThe Astronomical Journal
Extending geodetic and astrometric Very Long Baseline Interferometry (VLBI) observations from traditional centimeter wavebands to millimeter wavebands offers numerous scientific potentials and benefits. However, it was considered quite challenging due to
Shuangjing Xu   +16 more
doaj   +1 more source

An accuracy assessment of Magellan Very Long Baseline Interferometry (VLBI) [PDF]

open access: yes
Very Long Baseline Interferometry (VLBI) measurements of the Magellan spacecraft's angular position and velocity were made during July through September, 1989, during the spacecraft's heliocentric flight to Venus. The purpose of this data acquisition and
Border, J. S.   +2 more
core   +1 more source

The European VLBI network [PDF]

open access: yes
The capabilities of the European very long baseline interferometry (VLBI) network are summarized. The range of baseline parameters, sensitivities, and recording and other equipment available are included.
Schilizzi, R. T.
core   +1 more source

A Repeating Fast Radio Burst Source in the Outskirts of a Quiescent Galaxy

open access: yesThe Astrophysical Journal Letters
We report the discovery of the repeating fast radio burst (FRB) source FRB 20240209A using the Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB telescope.
Vishwangi Shah   +48 more
doaj   +1 more source

Long baseline vector determinations and intercomparisons [PDF]

open access: yes
The East Coast very long baseline interferometry (VLBI) group has performed about 60 experiments over the last 10 years in the process of developing and exploiting advanced VLBI techniques.
Knight, C. A.
core   +1 more source

Astronomical tests for quantum black hole structure

open access: yes, 2017
Quantum modifications to black holes on scales comparable to the horizon size, or even more radical physics, are apparently needed to reconcile the existence of black holes with the principles of quantum mechanics.
Giddings, Steven B.
core   +1 more source

Bayesian Constraints on the Ring Ellipticity of M87* 2017 Using Themis

open access: yesThe Astrophysical Journal
Measuring the properties of black hole images has the potential to constrain deviations from general relativity on horizon scales. Of particular interest is the ellipticity of the ring that is sensitive to the underlying spacetime.
Paul Tiede, Avery E. Broderick
doaj   +1 more source

Very Long Baseline Interferometry: the EVN, WSRT, and JIVE [PDF]

open access: gold, 2019
Huib Jan van Langevelde   +4 more
openalex   +1 more source

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