Results 21 to 30 of about 36,409 (218)

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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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).
openaire   +1 more source

Horizonless Spacetimes As Seen by Present and Next-generation Event Horizon Telescope Arrays

The Astrophysical Journal, 2023
We study the capabilities of present and future radio very long baseline interferometry arrays to distinguish black holes from horizonless spacetimes. We consider an example of a horizonless spacetime, obtained by overspinning a regular black hole.
Astrid Eichhorn, Roman Gold, Aaron Held
doaj   +1 more source

Wide-spectrum optical synthetic aperture imaging via spatial intensity interferometry

Opto-Electronic Advances, 2023
High resolution imaging is achieved using increasingly larger apertures and successively shorter wavelengths. Optical aperture synthesis is an important high-resolution imaging technology used in astronomy.
Chunyan Chu, Zhentao Liu, Mingliang Chen, Xuehui Shao, Guohai Situ, Yuejin Zhao, Shensheng Han   +6 more
doaj   +1 more source

Theoretical Analysis of the Spatial Baseline for Moon-Based SAR Cross-Track Interferometry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
The vast Moon surface, lower thermal environment, predictable orbit, and long distance of Earth–Moon centroid have provided long-term, large-scale, unique, stable, and many other advantages for Moon-based Earth observation, including the synthetic
Guoqiang Chen, Huadong Guo, Jinglong Dong, Wenjin Wu, Kai Wu, Huiying Liu, Mingyang Lv, Chunming Han, Yixing Ding   +8 more
doaj   +1 more source

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
openaire   +11 more sources

Atmospheric Limitations for High-frequency Ground-based Very Long Baseline Interferometry

The Astrophysical Journal
Very long baseline interferometry (VLBI) provides the highest-resolution images in astronomy. The sharpest resolution is nominally achieved at the highest frequencies, but as the observing frequency increases, so too does the atmospheric contribution to ...
Dominic W. Pesce, Lindy Blackburn, Ryan Chaves, Sheperd S. Doeleman, Mark Freeman, Sara Issaoun, Michael D. Johnson, Greg Lindahl, Iniyan Natarajan, Scott N. Paine, Daniel C. M. Palumbo, Freek Roelofs, Paul Tiede   +12 more
doaj   +1 more source

Evaluation of VLBI Observations with Sensitivity and Robustness Analyses

Mathematics, 2020
Very Long Baseline Interferometry (VLBI) plays an indispensable role in the realization of global terrestrial and celestial reference frames and in the determination of the full set of the Earth Orientation Parameters (EOP).
Pakize Küreç Nehbit, Robert Heinkelmann, Harald Schuh, Susanne Glaser, Susanne Lunz, Nicat Mammadaliyev, Kyriakos Balidakis, Haluk Konak, Emine Tanır Kayıkçı   +8 more
doaj   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Modeling Atmospheric Phase Corruptions in High-frequency Very-long-baseline Interferometry Using Gaussian Processes

The Astronomical Journal
Using very-long-baseline interferometry (VLBI) observations at (sub)millimeter wavelengths, the Event Horizon Telescope (EHT) currently achieves the finest angular resolution of any astronomical facility, necessary for imaging the horizon-scale structure
Uri Rolls, Dominic W. Pesce, Paul Tiede, Lindy Blackburn, Iniyan Natarajan, Sheperd S. Doeleman   +5 more
doaj   +1 more source