Results 201 to 210 of about 20,438 (217)

Searching for ultralight dark matter conversion in solar corona using Low Frequency Array data. [PDF]

Nat Commun
An H, Chen X, Ge S, Liu J, Luo Y.
europepmc   +1 more source

A decade of sub-arcsecond imaging with the International LOFAR Telescope. [PDF]

Astrophys Space Sci
Morabito LK, Jackson N, de Jong J, Escott E, Groeneveld C, Mahatma V, Petley J, Sweijen F, Timmerman R, van Weeren RJ.   +9 more
europepmc   +1 more source

Cosmic mysteries and the hydrogen 21-cm line: bridging the gap with lunar observations. [PDF]

Philos Trans A Math Phys Eng Sci
Fialkov A, Gessey-Jones T, Dhandha J.
europepmc   +1 more source

Robust inverse probability weighted estimators for doubly truncated Cox regression with closed-form standard errors. [PDF]

Lifetime Data Anal
Vazquez O, Xie SX.
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Effect of station selection on VLBI-to-GNSS orientation transfer using space-ties onboard a next generation Galileo satellite

Sert H, Hugentobler U, Karatekin Ö, Dehant V.   +3 more
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Flying through an Eruption-associated Magnetic Reconnection Current Sheet in the Solar Corona

Patel R, Niembro T, Xie X, Seaton D, Badman S, Roy S, Rivera Y, Reeves K, Stenborg G, Hess P, West M, Feller A, Hirzberger J, Suarez DO, Solanki S, Strecker H, Valori G.   +16 more
europepmc   +1 more source

Quasars: The Observational Perspectives [PDF]

, 2012
The empirical basis of quasar astronomy can be overawing especially in the twenty-first century. A first source of intricacy involves the nomenclature that has evolved to label the multifold phenomenological manifestations now united under the umbrella of active galactic nuclei (AGNs). A further complication involves observations of the many subclasses
Jack W. Sulentic, Mauro D'Onofrio, S. Zamfir, Deborah Dultzin, Dirk Grupe, Alberto Franceschini, Sergey G. Sergeev, Luigi Foschini, Tracey Jane Turner, Martin Gaskell, V. I. Pronik, Paola Marziani, Aleksander Volvach, Raffaella Morganti, Raffaella Morganti, Todd A. Boroson, Heino Falcke, Heino Falcke, Ajit Kembhavi, Gordon T. Richards, Michael R. S. Hawkins, Yuri Neshpor, Greg Shields, Ari Laor, Martin Elvis, Elmar Körding   +25 more
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Quasars

Applied Optics, 1966
A short historical outline of the discovery and a description of observed properties of quasars introduces questions as to their nature. Some of the principal arguments concerning their reality, distance, intrinsic properties and age lead to the conclusion that, while there is room for other points of view; a strong case can be made for the ...
openaire   +2 more sources

Bayesian Quasar Selection and the Quasar Luminosity Function

AIP Conference Proceedings, 2008
I summarize our work on the construction of deep photometric quasar catalogs using a non‐parametric Bayesian classifier based on kernel density estimation. Using only 5‐band optical data from the Sloan Digital Sky Survey (SDSS), we have identified nearly 1,000,000 photometric quasars candidates over ...
Gordon T. Richards, Coryn A.L. Bailer-Jones   +1 more
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