Results 31 to 40 of about 7,995,271 (350)

TEMPORAL SMEARING OF TRANSIENT RADIO SOURCES BY THE INTERGALACTIC MEDIUM [PDF]

, 2013
The temporal smearing of impulsive radio events at cosmological redshifts probes the properties of the ionized intergalactic medium (IGM). We relate the degree of temporal smearing and the profile of a scattered source to the evolution of a turbulent ...
J. Macquart, J. Koay
semanticscholar   +1 more source

Sources of the Radio Background Considered [PDF]

, 2010
We investigate different scenarios for the origin of the extragalactic radio background. The surface brightness of the background, as reported by the ARCADE 2 collaboration, is several times higher than that which would result from currently observed ...
A. Lawrence, Aleksić, Appleton, Benn, Beswick, Bigs, Blumenthal, Blundell, Blundell, Blundell, Bondi, Bondi, Bourne, Brunetti, Celotti, Ciliegi, Coleman, Colina, Condon, Condon, Condon, Dole, Dwarakanath, Dwek, Elmouttie, Elvis, Fanaroff, Feretti, Fixsen, Fomalont, Fomalont, Franceschini, Gervasi, Gilli, Giovannini, Grueff, Gruppioni, Hales, Hardcastle, Hickox, Ho, Ho, Hopkins, Hopkins, Hummel, Ibar, Ibar, Ivison, Ivison, J. Singal, Jamrozy, Jamrozy, Kaiser, Katgert-Merkelijn, Kellerman, Kim, Kogut, Konar, Kronberg, Large, Liang, Liang, Liang, Machalski, Machalski, Madau, Magnelli, Mannucci, Marsden, McGilchrist, McNamara, Owen, Padovani, Pearson, Petrosian, Prandoni, Richards, Richards, Rigby, Rudnick, Rybicki, Sargent, Schlickeiser, Seymour, Sikora, Simpson, Singal, Smolčić, Sreekumar, Stawarz, Subrahmanyan, Taylor, Taylor, V. Petrosian, Vallee, Vallée, Vlahakis, Volonteri, Wang, Weiler, Weiler, White, Willott, Wilson, Wilson, Windhorst, Windhorst, Windhorst, Windhorst, Wise, Ł. Stawarz   +110 more
core   +3 more sources

Periodic activity from a fast radio burst source [PDF]

Nature, 2020
Fast radio bursts (FRBs) are bright, millisecond-duration radio transients originating from sources at extragalactic distances1, the origin of which is unknown.
Chime, M. Amiri, B. Andersen, K. Bandura, M. Bhardwaj, P. Boyle, C. Brar, P. Chawla, T. Chen, J. Cliche, D. Cubranic, M. Deng, N. Denman, M. Dobbs, F. Dong, M. Fandino, E. Fonseca, B. Gaensler, U. Giri, D. Good, M. Halpern, J. Hessels, A. Hill, C. Höfer, A. Josephy, J. Kania, R. Karuppusamy, V. Kaspi, A. Keimpema, F. Kirsten, T. Landecker, D. Lang, C. Leung, D. Li, H.-H. Lin, B. Marcote, K. Masui, R. Mckinven, J. Mena-Parra, M. Merryfield, D. Michilli, N. Milutinovic, A. Mirhosseini, A. Naidu, L. Newburgh, C. Ng, K. Nimmo, Z. Paragi, C. Patel, U. Pen, T. Pinsonneault-Marotte, Z. Pleunis, M. Rafiei-Ravandi, Mubdi Rahman, S. Ransom, A. Renard, Pranav Sanghavi, P. Scholz, J. Shaw, K. Shin, S. Siegel, S. Singh, R. Smegal, Kendrick M. Smith, I. Stairs, S. Tendulkar, I. Tretyakov, K. Vanderlinde, H. Wang, X. Wang, D. Wulf, P. Yadav, A. Zwaniga   +72 more
semanticscholar   +1 more source

The Abundance of X-Shaped Radio Sources I. VLA Survey of 52 Sources With Off-Axis Distortions [PDF]

, 2015
Cheung identified a sample of 100 candidate X-shaped radio galaxies using the NRAO FIRST survey; these are small-axial-ratio extended radio sources with off-axis emission.
Cohen, Jake P., Lu, Jing, Roberts, David H., Saripalli, Lakshmi, Subrahmanyan, Ravi   +4 more
core   +2 more sources

A direct localization of a fast radio burst and its host [PDF]

Nature, 2017
Fast radio bursts are astronomical radio flashes of unknown physical nature with durations of milliseconds. Their dispersive arrival times suggest an extragalactic origin and imply radio luminosities that are orders of magnitude larger than those of all ...
S. Chatterjee, C. Law, R. Wharton, S. Burke-Spolaor, S. Burke-Spolaor, J. Hessels, J. Hessels, G. Bower, J. Cordes, S. Tendulkar, C. Bassa, P. Demorest, B. Butler, A. Seymour, P. Scholz, M. Abruzzo, S. Bogdanov, V. Kaspi, A. Keimpema, T. Lazio, B. Marcote, M. Mclaughlin, Z. Paragi, S. Ransom, M. Rupen, L. Spitler, H. V. Langevelde   +26 more
semanticscholar   +1 more source

Extended Radio Emission in the Perhipheral Regions of the Shapley Concentration Core

Galaxies, 2017
The Shapley Concentration (SC) is a galaxy supercluster (few tens of degrees) in the Local Universe (<z>∼0.048) which is currently undergoing cluster mergers and group accretion.
Tiziana Venturi, Sandro Bardelli, Daniele Dallacasa, Gabriella Di Gennaro, Fabio Gastaldello, Simona Giacintucci, Mariachiara Rossetti   +6 more
doaj   +1 more source

The Radio/Optical Catalog of the SSA13 Field [PDF]

, 2006
We present a 1.4-GHz catalog of 810 radio sources (560 sources in the complete sample) with 1.8" resolution found within a 17' radius in the SSA13 field (RA=13h12m,DEC=42d38').
A. J. Barger, Benn C. R., E. A. Richards, E. B. Fomalont, Fanaroff B. L., Garrett M. A., K. I. Kellermann, L. L. Cowie, Moriondo G., Oort J. A., P. Capak, R. A. Windhorst, R. B. Partridge, Sutherland W., Windhorst R. A.   +14 more
core   +3 more sources

Spectral index properties of milliJansky radio sources [PDF]

, 2012
At the faintest radio flux densities ( S 1.4 < 10 mJy), conflicting results have arisen regarding whether there is a flattening of the average spectral index between a low radio frequency (325 or 610 MHz) and, for example, 1.4 GHz.
K. Randall, A. Hopkins, R. Norris, P. Zinn, E. Middelberg, M. Mao, R. Sharp   +6 more
semanticscholar   +1 more source

Extragalactic Astrophysics With Next-Generation CMB Experiments

Frontiers in Astronomy and Space Sciences, 2019
Planck, SPT, and ACT surveys have clearly demonstrated that Cosmic Microwave Background (CMB) experiments, while optimized for cosmological measurements, have made important contributions to the field of extragalactic astrophysics in the last decade ...
Gianfranco De Zotti, Matteo Bonato, Matteo Bonato, Matteo Bonato, Mattia Negrello, Tiziana Trombetti, Carlo Burigana, Carlo Burigana, Carlo Burigana, Diego Herranz, Diego Herranz, Marcos López-Caniego, Zhen-Yi Cai, Laura Bonavera, Joaquin González-Nuevo   +14 more
doaj   +1 more source

A CHIME/FRB Study of Burst Rate and Morphological Evolution of the Periodically Repeating FRB 20180916B

The Astrophysical Journal, 2023
FRB 20180916B is a repeating fast radio burst (FRB) with a 16.3 day periodicity in its activity. In this study, we present morphological properties of 60 FRB 20180916B bursts detected by CHIME/FRB between 2018 August and 2021 December.
Ketan R. Sand, Daniela Breitman, Daniele Michilli, Victoria M. Kaspi, Pragya Chawla, Emmanuel Fonseca, Ryan Mckinven, Kenzie Nimmo, Ziggy Pleunis, Kaitlyn Shin, Bridget C. Andersen, Mohit Bhardwaj, P. J. Boyle, Charanjot Brar, Tomas Cassanelli, Amanda M. Cook, Alice P. Curtin, Fengqiu Adam Dong, Gwendolyn M. Eadie, B. M. Gaensler, Jane Kaczmarek, Adam Lanman, Calvin Leung, Kiyoshi W. Masui, Mubdi Rahman, Ayush Pandhi, Aaron B. Pearlman, Emily Petroff, Masoud Rafiei-Ravandi, Paul Scholz, Vishwangi Shah, Kendrick Smith, Ingrid Stairs, David C. Stenning   +33 more
doaj   +1 more source