Results 61 to 70 of about 101,827 (259)

Ultracompact extragalactic radio sources at 86GHz

, 2019
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Global millimeter VLBI array survey of ultracompact extragalactic radio sources at 86 GHz.' (bibcode: 2019A&A...622A ...
Ros, Eduardo, Krichbaum, Thomas P., Lindqvist, Michael, Moscow Institute of Physics and Technology, Zensus, Johann Anton, Hagiwara, Yoshiaki, Korea Astronomy and Space Science Institute, Lee, Sang-Sung, Toyo University, Max-Planck-Institut Für Radioastronomie, Nair, Dhanya G., Kovalev, Yuri Y., Department of Space, Earth and Environment, Onsala Space Observatory, Sverige, Mertens, Florent, De Vicente, Pablo, Institut de Radio Astronomie Millimétrique (IRAM), Institut für Experimentalphysik, Universität Hamburg, Lobanov, Andrei P., Bremer, Michael, University of Hamburg, Observatorio Astronómico Nacional, Observatorio de Yebes, Astro Space Center of Lebedev Physical Institute, Max Planck Institut für Astronomie, Astronomy   +23 more
core   +1 more source

Powerful Radio Sources in the Southern Sky. III. First Results of the Optical Spectroscopic Campaign

The Astrophysical Journal Supplement Series
We recently built the G4Jy-3CRE catalog of extragalactic radio sources. This catalog lists 264 powerful radio sources selected with similar criteria to those of the revised Third Cambridge Catalog, but visible from the Southern Hemisphere.
A. García-Pérez, H. A. Peña-Herazo, A. Jimenez-Gallardo, V. Chavushyan, F. Massaro, S. V. White, A. Capetti, B. Balmaverde, W. R. Forman, C. C. Cheung, J. P. Madrid, C. Mazzucchelli, N. P. H. Nesvadba, I. Andruchow, S. Cellone, R. Grossová, A. Paggi, E. Sani, V. Reynaldi, R. P. Kraft, C. Leto   +20 more
doaj   +1 more source

A Possible Solution to the Mystery of the ANITA Anomalous Events

Annalen der Physik, Volume 538, Issue 4, April 2026.
In 2006 and 2014, the Antarctic Impulsive Transient Antenna (ANITA), a balloon‐borne radio observatory flying over Antarctica, detected two strange upward‐going radio pulse events that have not yet been explained by our current understanding of physics.
Massimo Villata
wiley   +1 more source

The Chinese Radio Telescope Array for Interplanetary Scintillation Monitoring

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Solar flares, coronal mass ejections (CMEs) and enegertic particles, etc., are the driving sources that may cause catastrophic space weathers. It is desirable to obtain information of solar eruptions like flares and CMEs, etc., propagating from the Sun to the near‐Earth space.
Yihua Yan, Wei Wang, Jin Fan, Ming Xiong, Zhijun Chen, Linjie Chen, Cang Su, Sha Li, Jun Cheng, Jing Du, Xueshang Feng   +10 more
wiley   +1 more source

A new connection between the jet opening angle and the large‐scale morphology of extragalactic radio sources [PDF]

, 2012
In the case of an initially conical jet, we study the relation between jet collimation by the external pressure and large-scale morphology. We first consider the important length-scales in the problem, and then carry out axisymmetric hydrodynamic ...
M. Krause, P. Alexander, J. Riley, D. Hopton   +3 more
semanticscholar   +1 more source

The Extragalactic Radio Source Background [PDF]

Symposium - International Astronomical Union, 1990
The background of discrete extragalactic radio sources is described from the point of view of its simplest properties: surface density and surface distribution. New considerations, particularly with regard to the latter, open the possibility of detecting Universal structure on many angular scales.
openaire   +1 more source

Radar Polarimetry in Glaciology: Theory, Measurement Techniques, and Scientific Applications for Investigating the Anisotropy of Ice Masses

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Dielectric anisotropy in ice alters the propagation of polarized radio waves, so polarimetric radar sounding can be used to survey anisotropic properties of ice masses. Ice anisotropy is either intrinsic, associated with ice‐crystal orientation fabric (COF), or extrinsic, associated with material heterogeneity, such as bubbles, fractures, and ...
Benjamin H. Hills, T. J. Young, David A. Lilien, Esther Babcock, Nicole Bienert, Donald Blankenship, John Bradford, Giancorrado Brighi, Alex Brisbourne, Jørgen Dall, Reinhard Drews, Olaf Eisen, M. Reza Ershadi, Tamara A. Gerber, Nicholas Holschuh, Daniela Jansen, Thomas M. Jordan, Nanna B. Karlsson, Jilu Li, Carlos Martín, Kenichi Matsuoka, Daniel May, Falk M. Oraschewski, John Paden, Nicholas M. Rathmann, Neil Ross, Dustin M. Schroeder, Martin Siegert, Matthew R. Siegfried, Emma Smith, Ole Zeising   +30 more
wiley   +1 more source

Contribution of bright extragalactic radio sources to microwave anisotropy

, 2001
We estimate the contribution of extragalactic radio sources to fluctuations in sky temperature over the range of frequencies (10-300 GHz) used for cosmic microwave background (CMB) anisotropy measurements.
Sokasian, Aaron, Gawiser, Eric, Smoot, George F.   +2 more
core   +1 more source

The Evolution of Extragalactic Radio Sources [PDF]

Symposium - International Astronomical Union, 1996
A series of VLBI surveys of complete samples of radio sources selected at 5 GHz (Pearson & Readhead 1988, hereafter PR; Xu et al. 1995 and references therein) has revealed that ≃ 10% of the objects are “Compact Symmetric Objects” (CSOs), in which high-luminosity radio emission regions are seen on both sides of the center of activity on scales less ...
A. C. S. Readhead, T. J. Pearson, G. B. Taylor, P. N. Wilkinson   +3 more
openaire   +1 more source

A Comparative Study of VTEC Estimates Derived From S/X VLBI and VGOS Observations

Space Weather, Volume 23, Issue 12, December 2025.
Abstract The ionosphere, which strongly varies in time and space, is one of the largest error sources for microwave measurements, if not accounted for accurately. Especially for single‐frequency observations, precise ionospheric models are needed to correct for the ionospheric delays. This study explores the utility of Very Long Baseline Interferometry
Arno Rüegg, Grzegorz Kłopotek, Benedikt Soja   +2 more
wiley   +1 more source