Results 71 to 80 of about 5,542,325 (204)

Toward an Internally Consistent Astronomical Distance Scale

, 2017
Accurate astronomical distance determination is crucial for all fields in astrophysics, from Galactic to cosmological scales. Despite, or perhaps because of, significant efforts to determine accurate distances, using a wide range of methods, tracers, and
Monelli, Matteo, Oguri, Masamune, De Grijs, Richard, Masamune Oguri, Matteo Monelli, Suyu, Sherry H., Courbin, F., Sherry H. Suyu, Martínez-Vázquez, C., Monelli, M., Clara E. Martínez-Vázquez, Martinez-Vazquez, Clara E., Suyu, S., Oguri, M., Richard de Grijs, Courbin, Frederic, Frédéric Courbin, de Grijs, R.   +17 more
core   +1 more source

Review of topo-astronomical methods for the precise orientation in archaeological sites

, 2009
Cosmology across cultures; workshop held at Parque de las Ciencias, Granada, Spain, 8-12 September 2008.A review of the methods and instrumentation used in the determination of topo-astronomical alignments is presented in this paper, with a detailed ...
Folgueira López, Marta, Pascual, Esther, Mejuto, Javier, Rodríguez Caderot, Gracia   +3 more
core   +1 more source

A Formalism for Calibrating the Instrumental Polarization of Radio Interferometric Arrays at Meter Wavelengths Using Unpolarized Sky: A Demonstration Using MWA Observations

The Astrophysical Journal Supplement Series
Calibration of instrumental polarization is critical for measuring polarized radio emissions from astrophysical sources to extract the magnetic field information in astrophysical, heliospheric, and terrestrial plasmas.
Devojyoti Kansabanik, Angelos Vourlidas, Soham Dey, Surajit Mondal, Divya Oberoi   +4 more
doaj   +1 more source

Report on the organization of the International Astronomical Union,

, 1920
Contains "Statutes of convention" organizing the International Astronomical Union, and reports of committees of the American Section of the International Astronomical Union."Published in the Proceedings of the National Academy of Sciences, June, 1920 ...
International Astronomical Union. American Section.
core  

Publications of the Astronomical and Astrophysical Society of America.

, 1910
Vol. 2 includes abstracts of papers read at the Society's conferences, 1910-1913; and "Report of Comet committee, 1909-1913, with index catalog of all photographs of Halley's comet reported to the committee."Vol.
American Astronomical Society.
core  

Astronomical techniques in intensive care [PDF]

Astronomy & Geophysics, 2015
L. K. Harra, T. Pollard, D. Williams, K. Fong   +3 more
openaire   +1 more source

Application of digital image processing techniques to astronomical imagery 1977 [PDF]

, 1978
Nine specific techniques of combination of techniques developed for applying digital image processing technology to existing astronomical imagery are described.
Lorre, J. J., Lynn, D. J.
core  

Observational Signatures of Dust Traffic Jams in Polar-aligning Circumbinary Disks

The Astrophysical Journal Letters
Misaligned circumbinary disks will produce dust traffic jams during alignment or antialignment to the binary orbital plane. We conduct a hydrodynamical simulation of an initially misaligned circumbinary disk undergoing polar alignment with multiple dust ...
Jeremy L. Smallwood, Rebecca Nealon, Hsi-Wei Yen, Christophe Pinte, Cristiano Longarini, Hossam Aly, Min-Kai Lin   +6 more
doaj   +1 more source

SMR: Scheduler with Multichannel Map-encoded Reinforcement Learning for Radio Telescopes

The Astronomical Journal
Observation scheduling for large single-dish radio telescopes is a multiobjective optimization problem: schedulers must maximize on-source scientific return under strict mechanical and environmental constraints.
Zhenyang Huang, Na Wang, Zhiyong Liu, Chuhao Gao   +3 more
doaj   +1 more source

On-sky Demonstration of Subdiffraction-limited Astronomical Measurement Using a Photonic Lantern

The Astrophysical Journal Letters
Resolving fine details of astronomical objects provides critical insights into their underlying physical processes. This drives in part the desire to construct ever-larger telescopes and interferometer arrays and to observe at shorter wavelengths to ...
Yoo Jung Kim, Michael P. Fitzgerald, Sébastien Vievard, Jonathan Lin, Yinzi Xin, Miles Lucas, Olivier Guyon, Julien Lozi, Vincent Deo, Elsa Huby, Sylvestre Lacour, Manon Lallement, Rodrigo Amezcua-Correa, Sergio Leon-Saval, Barnaby Norris, Mathias Nowak, Steph Sallum, Jehanne Sarrazin, Adam Taras, Stephanos Yerolatsitis, Nemanja Jovanovic   +20 more
doaj   +1 more source