Results 11 to 20 of about 4,978 (186)

Very Long Baseline Interferometry with the SKA [PDF]

Proceedings of Advancing Astrophysics with the Square Kilometre Array — PoS(AASKA14), 2015
Adding VLBI capability to the SKA arrays will greatly broaden the science of the SKA, and is feasible within the current specifications. SKA-VLBI can be initially implemented by providing phased-array outputs for SKA1-MID and SKA1-SUR and using these extremely sensitive stations with other radio telescopes, and in SKA2 by realising a distributed ...
Paragi, Zsolt,, Godfrey, Leith,, Reynolds, Cormac,, Rioja, Maria,, Deller, Adam,, Zhang, Bo,, Gurvits, Leonid,, Bietenholz, Michael,, Szomoru, Arpad,, Bignall, Hayley,, Boven, Paul,, Charlot, P., Dodson, Richard,, Frey, Sandor,, Garrett, Michael,, Imai, Hiroshi,, Lobanov, Andrei,, Reid, Mark,, Ros, Eduardo,, van Langevelde, Huib,, Zensus, J. Anton, Zheng, Xing Wu,, Alberdi, Antxon,, Agudo, Ivan,, An, Tao,, Argo, Megan,, Beswick, Rob,, Biggs, Andy D.,, Brunthaler, Andreas,, Campbell, Robert M.,, Cimo, Giuseppe,, Colomer, Francisco,, Corbel, Stephane,, Conway, John,, Cseh, David,, Deane, Roger,, Falcke, Heino,, Gabanyi, Krisztina,, Gawronski, Marcin,, Gaylard, Michael,, Giovannini, Gabriele,, Giroletti, Marcello,, Goddi, Ciriaco,, Goedhart, Sharmila,, Gomez, Jose L.,, Gunn, Alastair,, Jung, Taehyun,, Kharb, Preeti,, Klockner, Hans-Rainer,, Kording, Elmar,, Kovalev, Yurii Yu.,, Kunert-Bajraszewska, Magdalena,, Lindqvist, Michael,, Lister, Matt,, Mantovani, Franco,, Marti-Vidal, Ivan,, Mezcua, Mar,, Mckean, John,, Middelberg, Enno,, Miller-Jones, James,, Moldon, Javier,, Muxlow, Tom,, O'Brien, Tim,, Pérez-Torres, Miguel,, Pogrebenko, Sergei,, Quick, Jonathan,, Rushton, Anthony P.,, Schilizzi, Richard,, Smirnov, Oleg,, Sohn, Bong Won,, Surcis, Gabriele,, Taylor, Greg,, Tingay, Steven,, Tudose, Valeriu,, van Der Horst, Alexander,, van Leeuwen, Joeri,, Venturi, Tiziana,, Vermeulen, Rene,, Vlemmings, Wouter,, de Witt, Aletha,, Wucknitz, Olaf,, Yang, Jun,   +81 more
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PHOTON MASS AND VERY LONG BASELINE INTERFEROMETRY [PDF]

International Journal of Modern Physics D, 2010
A relation between the photon mass, its frequency, ν, and the deflection parameter, γ, determined by experimentalists (that characterizes the contribution of space curvature to gravitational deflection) is found. This amazing result allows us to conclude that the knowledge of the parameters ν and γ is all we need to set up gravitational bounds on the ...
Accioly, Antonio Jose, Helayel-Neto, Jose, Scatena, Eslley   +2 more
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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   +6 more sources

Infrared Long Baseline Interferometry [PDF]

Highlights of Astronomy, 1989
During the last few years, two new instruments using long baseline interferometry have been constructed for high angular resolution astronomy in the mid-infrared spectral region (8-12 μxm). One called SOIRDETE-Synthese d’Overture en InfraRouge a DEux TElescopes-was built by J. Gay and his collaborators at CERGA.
W.C. Danchi, M. Bester, P.R. McCullough, C.H. Townes   +3 more
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Long Baseline Optical Interferometry [PDF]

Highlights of Astronomy, 1989
During the last three years significant results have been obtained from several operational, long baseline optical interferometers. Precision stellar angular diameters (accuracy of order 2% and better) have been reported in the infrared (DiBenedetto and Rabbia, 1987) and in the visible (Davis and Tango, 1986).
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Observation of Double Star by Long Baseline Interferometry [PDF]

EAS Publications Series, 2014
F. Millour, A. Chiavassa, L. Bigot, O. Chesneau, A. Meilland \& P. Stee. What can the highest angular resolution bring to stellar astrophysics?, 69-70, EDP sciences, 2015, EAS publication series, 978-2-7598-1833-4. \<10.1051/eas/1569020\>.
Bonneau, Daniel, Millour, Florentin, Meilland, Anthony   +2 more
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Key Science Goals for the Next-Generation Event Horizon Telescope

Galaxies, 2023
The Event Horizon Telescope (EHT) has led to the first images of a supermassive black hole, revealing the central compact objects in the elliptical galaxy M87 and the Milky Way.
Michael D. Johnson, Kazunori Akiyama, Lindy Blackburn, Katherine L. Bouman, Avery E. Broderick, Vitor Cardoso, Rob P. Fender, Christian M. Fromm, Peter Galison, José L. Gómez, Daryl Haggard, Matthew L. Lister, Andrei P. Lobanov, Sera Markoff, Ramesh Narayan, Priyamvada Natarajan, Tiffany Nichols, Dominic W. Pesce, Ziri Younsi, Andrew Chael, Koushik Chatterjee, Ryan Chaves, Juliusz Doboszewski, Richard Dodson, Sheperd S. Doeleman, Jamee Elder, Garret Fitzpatrick, Kari Haworth, Janice Houston, Sara Issaoun, Yuri Y. Kovalev, Aviad Levis, Rocco Lico, Alexandru Marcoci, Niels C. M. Martens, Neil M. Nagar, Aaron Oppenheimer, Daniel C. M. Palumbo, Angelo Ricarte, María  J. Rioja, Freek Roelofs, Ann C. Thresher, Paul Tiede, Jonathan Weintroub, Maciek Wielgus   +44 more
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Very Long Baseline Interferometry [PDF]

Highlights of Astronomy, 1989
The technique of very long baseline interferometry (VLBI) has undergone two decades of steady growth and refinement since its inception in 1967. In the beginning, only crude measurements of visibility on single baselines were possible. Now 18-station arrays have been used to produce images with dynamic ranges exceeding 2000:1; relative motions of ...
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Lorentz symmetry and very long baseline interferometry [PDF]

Physical Review D, 2016
Lorentz symmetry violations can be described by an effective field theory framework that contains both General Relativity and the Standard Model of particle physics called the Standard-Model extension (SME). Recently, post-fit analysis of Gravity Probe B and binary pulsars lead to an upper limit at the $10^{-4}$ level on the time-time coefficient $\bar
Poncin-Lafitte, C. Le, Hees, A., Lambert, S.   +2 more
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Single-band VLBI Absolute Astrometry

The Astronomical Journal, 2023
The ionospheric path delay impacts single-band, very long baseline interferometry (VLBI) group delays, which limits their applicability for absolute astrometry.
Leonid Petrov
doaj   +1 more source