Results 71 to 80 of about 101,827 (259)

Extragalactic sources towards the central region of the Galaxy

, 2005
Restricted Access.We have observed a sample of 64 small-diameter sources towards the central -6° < l < 6°, -2° < b < 2° of the Galaxy with the aim of studying the Faraday rotation measure near the Galactic Centre region.
Subrahmanyan, Ravi, Roy, Subhashis, Rao, A.P.   +2 more
core   +1 more source

HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa

Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.
ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley   +1 more source

Planck early results. XIII. Statistical properties of extragalactic radio sources in the Planck Early Release Compact Source Catalogue [PDF]

, 2011
The data reported inPlanck’s Early Release Compact Source Catalogue (ERCSC) are exploited to measure the number counts (dN/dS )o f extragalactic radio sources at 30, 44, 70, 100, 143 and 217 GHz.
P. Ade, N. Aghanim, F. Argüeso, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. Balbi, A. Banday, R. B. Barreiro, J. G. Bartlett, J. G. Bartlett, E. Battaner, K. Benabed, J. Bernard, J. Bernard, M. Bersanelli, M. Bersanelli, R. Bhatia, A. Bonaldi, L. Bonavera, L. Bonavera, J. Bond, J. Borrill, J. Borrill, F. Bouchet, M. Bucher, C. Burigana, P. Cabella, B. Cappellini, J. Cardoso, J. Cardoso, J. Cardoso, A. Catalano, A. Catalano, L. Cayón, A. Challinor, A. Chamballu, R. Chary, Xun Chen, L. Chiang, P. Christensen, D. Clements, S. Colafrancesco, S. Colombi, F. Couchot, B. Crill, F. Cuttaia, L. Danese, R. Davies, R. J. Davis, P. Bernardis, G. Gasperis, A. D. Rosa, G. Zotti, G. Zotti, J. Delabrouille, J. Delouis, F. Désert, C. Dickinson, H. Dole, S. Donzelli, S. Donzelli, O. Doré, U. Dörl, M. Douspis, X. Dupac, G. Efstathiou, T. Ensslin, H. Eriksen, F. Finelli, O. Forni, O. Forni, M. Frailis, E. Franceschi, S. Galeotta, K. Ganga, K. Ganga, M. Giard, M. Giard, G. Giardino, Y. Giraud-Héraud, J. González-Nuevo, K. Górski, K. Górski, S. Gratton, A. Gregorio, A. Gruppuso, F. Hansen, D. Harrison, S. Henrot-Versille, D. Herranz, S. Hildebrandt, S. Hildebrandt, S. Hildebrandt, E. Hivon, M. Hobson, W. Holmes, W. Hovest, R. Hoyland, K. Huffenberger, A. Jaffe, M. Juvela, E. Keihänen, R. Keskitalo, R. Keskitalo, T. Kisner, R. Kneissl, R. Kneissl, L. Knox, H. Kurki-Suonio, H. Kurki-Suonio, G. Lagache, A. Lähteenmäki, A. Lähteenmäki, A. Lasenby, R. Laureijs, C. Lawrence, S. Leach, J. Leahy, R. Leonardi, R. Leonardi, P. Lilje, M. Linden-Vørnle, M. López-Caniego, P. Lubin, J. Macías-Pérez, B. Maffei, M. Magliocchetti, D. Maino, D. Maino, N. Mandolesi, R. Mann, M. Maris, E. Martinez-Gonzalez, S. Masi, M. Massardi, S. Matarrese, F. Matthai, P. Mazzotta, P. Meinhold, A. Melchiorri, L. Mendes, A. Mennella, A. Mennella, M. Miville-Deschênes, M. Miville-Deschênes, A. Moneti, L. Montier, L. Montier, G. Morgante, D. Mortlock, D. Munshi, D. Munshi, A. Murphy, P. Naselsky, P. Natoli, P. Natoli, P. Natoli, C. Netterfield, H. Nørgaard-Nielsen, F. Noviello, D. Novikov, I. Novikov, I. O'Dwyer, S. Osborne, F. Pajot, R. Paladini, B. Partridge, F. Pasian, G. Patanchon, T. Pearson, O. Perdereau, L. Perotto, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, S. Plaszczynski, P. Platania, E. Pointecouteau, E. Pointecouteau, G. Polenta, G. Polenta, N. Ponthieu, T. Poutanen, T. Poutanen, T. Poutanen, G. Prézeau, S. Prunet, J. Puget, J. Rachen, R. Rebolo, R. Rebolo, M. Reinecke, S. Ricciardi, T. Riller, I. Ristorcelli, I. Ristorcelli, G. Rocha, C. Rosset, M. Rowan‐Robinson, J. Rubiño-Martín, J. Rubiño-Martín, B. Rusholme, A. Sajina, M. Sandri, D. Scott, M. Seiffert, S. Serjeant, P. Shellard, G. Smoot, G. Smoot, G. Smoot, J. Starck, J. Starck, F. Stivoli, V. Stolyarov, R. Stompor, R. Sudiwala, J. Sygnet, J. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tomasi, J. Torre, M. Tristram, J. Tuovinen, M. Türler, G. Umana, L. Valenziano, J. Varis, P. Vielva, F. Villa, N. Vittorio, L. Wade, B. Wandelt, B. Wandelt, A. Wilkinson, D. Yvon, A. Zacchei, A. Zonca   +242 more
semanticscholar   +1 more source

The Extragalactic Gamma-Ray Background from Core-dominated Radio Galaxies [PDF]

Astrophysical Journal, 2019
Recent radio surveys have discovered a large number of low-luminosity core-dominated radio galaxies that are much more abundant than those at higher luminosities.
F. Stecker, C. Shrader, M. Malkan
semanticscholar   +1 more source

An Extragalactic Widefield Search for Technosignatures with the Murchison Widefield Array

The Astrophysical Journal
It is common for surveys that are designed to find artificial signals generated by distant civilizations to focus on galactic sources. Recently, researchers have started focusing on searching for all other sources within the field observed, including the
C. D. Tremblay, S. J. Tingay
doaj   +1 more source

An Updated Repository of Sub-mJy Extragalactic Source-Count Measurements in the Radio Domain

Galaxies
We present an updated repository of sub-mJy extragalactic radio source counts between 150 MHz and 10 GHz, incorporating recent advances in radio surveys and observational techniques. By compiling and refining previous datasets, we provide a comprehensive
Vincenzo Galluzzi, Meriem Behiri, Marika Giulietti, Andrea Lapi   +3 more
doaj   +1 more source

Deep Synoptic Array Science: Implications of Faraday Rotation Measures of Fast Radio Bursts Localized to Host Galaxies

The Astrophysical Journal Letters, 2023
Faraday rotation measures (RMs) of fast radio bursts (FRBs) offer the prospect of directly measuring extragalactic magnetic fields. We present an analysis of the RMs of 10 as yet nonrepeating FRBs detected and localized to host galaxies with robust ...
Myles B. Sherman, Liam Connor, Vikram Ravi, Casey Law, Ge Chen, Kritti Sharma, Morgan Catha, Jakob T. Faber, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, James W. Lamb, Paul Rasmussen, Jun Shi, Dana Simard, Jean Somalwar, Reynier Squillace, Sander Weinreb, David P. Woody, Nitika Yadlapalli, The Deep Synoptic Array Team   +23 more
doaj   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

THE IMAGES OF EXTRAGALACTIC RADIO SOURCES IN THE DIFFUSION MODEL

Odessa Astronomical Publications, 2017
The distribution of the spectral index and radio lobes' isophots were derived by numerical methods in the diffusion model of extragalactic radio sources. The kinetic equation for the distribution function of relativistic electrons is considered.
F. M. Kolesnikov, V. M. Kontorovich
doaj   +1 more source

Extragalactic radio surveys in the pre-Square Kilometre Array era [PDF]

Royal Society Open Science, 2017
The era of the Square Kilometre Array is almost upon us, and pathfinder telescopes are already in operation. This brief review summarizes our current knowledge of extragalactic radio sources, accumulated through six decades of continuum surveys at the ...
Chris Simpson
doaj   +1 more source