Results 81 to 90 of about 38,529 (262)

Average fractional polarization of extragalactic sources at Planck frequencies

, 2018
Recent detailed simulations have shown that an insufficiently accurate characterization of the contamination of unresolved polarized extragalactic sources can seriously bias measurements of the primordial cosmic microwave background (CMB) power spectrum ...
Burigana, C., De Zotti, G., Galluzzi, V., Massardi, M., Trombetti, T.   +4 more
core   +1 more source

Extragalactic radio sources [PDF]

The standard model for extragalactic variable radio sources comprises an isotropically expanding plasmoid with frozen magnetic flux and an electron distribution which evolves adiabatically.
Sturrock, P. A.
core   +1 more source

Predictions for high-frequency radio surveys of extragalactic sources

, 2004
We present detailed predictions of the contributions of the various source populations to the counts at frequencies of tens of GHz. New evolutionary models are worked out for flat-spectrum radio quasars, BL Lac objects, and steep-spectrum sources. Source
Aghanim, Agol, Aitken, Allen, Argüeso, Baganoff, Barbosa, Bennett, Blandford, Bondi, Bryan, Carlstrom, Chapman, Ciardi, Colafrancesco, Condon, D. Mesa, Dallacasa, Dawson, De Zotti, Di Matteo, di Matteo, Dunlop, Dupac, Eke, Ettori, Fabian, Fanti, Fomalont, G. De Zotti, Galliano, Garrett, Gavazzi, Gehrels, Gnedin, Grainge, Granato, Granato, Gregory, Gregory, Gruppioni, Helou, Herranz, Holder, Ikebe, Ikeuchi, J. González-Nuevo, Jackson, Komatsu, Kovac, Kühr, L. Silva, L. Toffolatti, Lapi, Martínez-González, Mason, Massardi, Morganti, Mészáros, Natarajan, Natarajan, O'Dea, Oh, P. Mazzotta, Pauliny-Toth, Pauliny-Toth, Peacock, Perna, Pierpaoli, Pierpaoli, Platania, Polatidis, R. Ricci, Readhead, Rees, Rees, Refregier, Rosa-González, Sadler, Seaton, Sheth, Silva, Snellen, Sunyaev, Taylor, Taylor, Toffolatti, Toffolatti, Trushkin, Tschager, Vielva, Waldram, Waxman, White, Wijers   +94 more
core   +1 more source

GMRT observations of the field of INTEGRAL X-ray sources- II (newly discovered hard X-ray sources)

, 2005
We have conducted low-frequency radio observations with the Giant Metrewave Radio Telescope (GMRT) of 40 new hard X-ray sources discovered by the INTEGRAL satellite.
A. P. Rao, Altenhoff, Bamba, Barlow, Becker, Belanger, Bird, C. H. Ishwara-Chandra, Capitanio, Condon, Condon, Corbel, Gursky, Jackson, Lutovinov, M. Pandey, Markwardt, Masetti, Monet, P. Durouchoux, Pandey, Pappa, R. Manchanda, Reig, Revnivtsev, Revnivtsev, Sidoli, Steeghs, Stephen, Swank, Ubertini, Voges, Zoonematkermani   +32 more
core   +1 more source

The extragalactic radio-source population at 95 GHz

, 2008
We have used the Australia Telescope Compact Array (ATCA) at 95GHz to carry out continuum observations of 130 extragalactic radio sources selected from the Australia Telescope 20GHz (AT20G) survey. Over 90% of these sources are detected at 95 GHz, and we
Browne I. W. A., Carole A. Jackson, Cornwell T. J., Elaine M. Sadler, Gianfranco De Zotti, Kellermann K. I., Lopez-Caniego M., Patnaik A. R., Robert J. Sault, Roberto Ricci, Ronald D. Ekers, Scott D., Steppe H., Thompson A.   +13 more
core   +3 more sources

A Deep VLA Search for a Persistent Radio Counterpart to the One-off FRB 20250316A

The Astrophysical Journal Letters
Fast radio burst (FRB) 20250316A, detected by CHIME on 2025 March 16 with a fluence of 1.7 ± 0.1 kJy ms and a dispersion measure of 161.3 ± 0.4 pc cm ^−3 , ranks among the brightest extragalactic FRBs at ∼40 Mpc. We obtain deep Karl G.
Tao An, Ailing Wang, Yu-Chen Huang, Jia-Pei Feng, Yuanqi Liu, Zhongli Zhang, Zi-Gao Dai   +6 more
doaj   +1 more source

Induced Compton Scattering in Gigahertz Peak Spectrum Sources

, 1997
We revisit the shocked shell model for the class of Active Galactic Nuclei known as Gigahertz Peak Spectrum sources, incorporating new observational data on the radiation brightness temperatures. We argue that in addition to free-free absorption, induced
Coppi P., Fanti R., Geoffrey V. Bicknell, Levinson A., Michael A. Dopita, Sunyaev R. A., Zdenka Kuncic   +6 more
core   +1 more source

The Variability of Persistent Radio Sources of Fast Radio Bursts

The Astrophysical Journal
Over 700 bright millisecond-duration radio transients, known as fast radio bursts (FRBs), have been identified to date. Nevertheless, the origin of FRBs remains unknown.
Ai Yuan Yang, Yi Feng, Chao-Wei Tsai, Di Li, Hui Shi, Pei Wang, Yuan-Pei Yang, Yong-Kun Zhang, Chen-Hui Niu, Ju-Mei Yao, Yu-Zhu Cui, Ren-Zhi Su, Xiao-Feng Li, Jun-Shuo Zhang, Yu-Hao Zhu, W. D. Cotton   +15 more
doaj   +1 more source

STUDY OF EFFECTS OF LUNAR TIDAL WAVE PASSAGE IN UPPER ATMOSPHERE OF EARTH ACCORDING TO MONITORING DATA AT RADIO TELESCOPE «URAN-4» RI NANU

Odessa Astronomical Publications, 2019
The paper examines data on the effects of the lunar tidal wave in the Earth 's upper atmosphere on the observed flux of radio sources. Monitoring of the fluxes of powerful galactic and extragalactic radio sources is carried out at the URAN-4 radio ...
M. I. Ryabov, L. I. Sobitnyak
doaj   +1 more source

Source structure errors in radio-interferometric clock synchronization for ten measured distributions [PDF]

The effects of source structure on radio interferometry measurements were investigated. The brightness distribution measurements for ten extragalactic sources were analyzed.
Thomas, J. B.
core   +1 more source