Results 141 to 150 of about 101,827 (259)

Angular structure of extragalactic radio sources at low frequencies

, 2005
The low frequency VLBI of URAN network operated in the decameter range has been designed in Ukraine to study cosmic radio sources. The network consists of five radio telescopes making up of four interferometers with baselines range from 42 to 913 km with
Shepelev, V.A., Brazhenko, A.I., Koshovy, V.V., Lozynsky, A.R., Megn, A.V., Rashkovsky, S.L.   +5 more
core  

A compiled catalogue of optical positions of extragalactic radio sources

, 1996
Based on 28 individual catalogues, in which the positions of optical counterparts of extragalactic radio sources are listed, we compiled a combined catalogue by means of a weighted least squares adjustment.
Jinling Li, Wenjing Jin
core   +1 more source

A Catalog of 971 FR I Radio Galaxies from the FIRST Survey via Hybrid Deep Learning and Ridgeline Flux Density Distribution Analysis

The Astrophysical Journal Supplement Series
We present a catalog of 971 FR I radio galaxies (FR Is) identified from the Very Large Array Faint Images of the Radio Sky at Twenty centimeters (FIRST) survey.
Baoqiang Lao, Xiaolong Yang, Wenjun Xiao, Tapan K. Sasmal, Yanli Zou, Didi Liu, Zhixian Liao, Ye Lu, Rushuang Zhao   +8 more
doaj   +1 more source

Kinematics of Extragalactic Radio Sources

, 2004
Symmetric extragalactic radio sources exhibit a baffling array of features - the remarkable symmetry between the two lobes, the emission in the radio frequency range, well collimated jets, core regions emitting blue and ultraviolet light, transient X-ray and gamma ray bursts, etc.
openaire   +2 more sources

The AllWISE Catalog as an Infrared Celestial Reference Frame in the Gaia Era

The Astronomical Journal
The launch of Gaia in 2013 December ushered in a new era of space astrometry, allowing for fundamental reference research at an unprecedented level of precision.
J.-C. Liu, N. Liu, Z. Zhu, J. Yao, I. Nurul Huda, Z.-W. Wang   +5 more
doaj   +1 more source

Radio, millimeter-submillimeter, and infrared spectra of flat-spectrum extragalactic radio sources

, 1994
We present radio to submillimeter-wave continuum spectra of 44 bright, compact extragalactic radio sources with flat spectra at centimeter wavelengths ('blazars').
Marscher, Alan P., Valtaoja, Esko, Aller, Margo F., Terasranta, Harri, Bloom, Steven D., Aller, Hugh D., Gear, Walter Kieran   +6 more
core   +1 more source

The Morphology of Extragalactic Radio Sources of High and Low Luminosity

, 1974
B. Fanaroff, J. Riley
semanticscholar   +1 more source

A JWST Paα Calibration of the Radio Luminosity–Star Formation Rate Relation at z ∼ 1.3

The Astrophysical Journal
As radio emission from normal galaxies is a dust-free tracer of star formation, tracing the star formation history of the Universe is a key goal of the Square Kilometre Array and the Next-Generation Very Large Array.
Nick Seymour, Catherine Hale, Imogen Whittam, Pascal Oesch, Alba Covelo-Paz, Stijn Wuyts, J. Afonso, R. A. A. Bowler, Joe Arthur Grundy, Ravi Jaiswar, Matt Jarvis, Allison Matthews, Romain A. Meyer, Chloe Neufeld, Naveen A. Reddy, Irene Shivaei, Dan Smith, Rohan Varadaraj, Michael A. Wozniak, Lyla Jung   +19 more
doaj   +1 more source

A Radio Study of Persistent Radio Sources in Nearby Dwarf Galaxies: Implications for Fast Radio Bursts

The Astrophysical Journal
We present 1–12 GHz Karl G. Jansky Very Large Array observations of nine off-nuclear persistent radio sources (PRSs) in nearby ( z ≲ 0.055) dwarf galaxies, along with high-resolution European VLBI Network observations for one of them at 1.7 GHz.
Y. Dong, T. Eftekhari, W. Fong, S. Bhandari, E. Berger, O. S. Ould-Boukattine, J. W. T. Hessels, N. Sridhar, A. Reines, B. Margalit, J. Darling, A. C. Gordon, J. E. Greene, C. D. Kilpatrick, B. Marcote, B. D. Metzger, K. Nimmo, A. E. Nugent, Z. Paragi, P. K. G. Williams   +19 more
doaj   +1 more source

Optical counterpart positions of extragalactic radio sources and connecting optical and radio reference frames

, 2009
We discuss the results of an investigation of astrometric positions of extragalactic radio sources from a list for the International Celestial Reference Frame.
Khamitov, I., Maigurova, N., Wang, S., Jin, W., R. Gumerov, Z. Tang, W. Jin, N. Maigurova, G. Pinigin, Z. Aslan, Gumerov, R., Pinigin, G., I. Khamitov, S. Wang, Tang, Z., Aslan, Z.   +15 more
core   +1 more source