Results 31 to 40 of about 129,169 (226)

IGR J14488-4008: an X-ray peculiar giant radio galaxy discovered by INTEGRAL [PDF]

, 2015
In this paper we report the discovery and detailed radio/X-ray analysis of a peculiar giant radio galaxy (GRG) detected by INTEGRAL, IGR J14488-4008. The source has been recently classified as a Seyfert 1.2 galaxy at redshift 0.123; the radio data denote
Bassani, Loredana, Bird, Antony J., Dallacasa, Daniele, Lal, Dharam Vir, Malizia, Angela, Molina, Manuela, Ubertini, Pietro, Venturi, Tiziana   +7 more
core   +2 more sources

The growth and assembly of a massive galaxy at z ~ 2

, 2009
We study the stellar mass assembly of the Spiderweb Galaxy (MRC 1138-262), a massive z = 2.2 radio galaxy in a protocluster and the probable progenitor of a brightest cluster galaxy.
A. W. Zirm, Benítez, Bertin, Binney, Blakeslee, Boylan-Kolchin, Bruzual, Bruzual, Chabrier, Chandraseker, Coe, Conroy, Conroy, De Lucia, di Matteo, Font, G. K. Miley, Gallagher, Guo, H. J. A. Röttgering, Hatch, Ivison, J. D. Kurk, Kodama, Kriek, Kurk, Malumuth, Maraston, Mihos, Miley, Miley, N. A. Hatch, Nesvadba, Overzier, Papovich, Pentericci, Pentericci, R. A. Overzier, Reddy, Salim, Saro, Saro, Sawicki, Schlegel, Seymour, Shapley, Spergel, Stevens, Venemans, Villar-Martin, Villar-Martín, Zirm, Zirm   +52 more
core   +1 more source

A Nonrepeating Fast Radio Burst in a Dwarf Host Galaxy

The Astrophysical Journal, 2023
We present the discovery of an as yet nonrepeating fast radio burst (FRB), FRB 20210117A, with the Australian Square Kilometre Array Pathfinder (ASKAP), as a part of the Commensal Real-time ASKAP Fast Transients Survey.
Shivani Bhandari, Alexa C. Gordon, Danica R. Scott, Lachlan Marnoch, Navin Sridhar, Pravir Kumar, Clancy W. James, Hao Qiu, Keith W. Bannister, Adam T. Deller, Tarraneh Eftekhari, Wen-fai Fong, Marcin Glowacki, J. Xavier Prochaska, Stuart D. Ryder, Ryan M. Shannon, Sunil Simha   +16 more
doaj   +1 more source

PKS2250-41: a case study for triggering

, 2008
We present the results of a multiwavelength study of the z = 0.31 radio source PKS2250-41. Integral field unit and long-slit spectroscopy obtained using VIMOS and FORS1 on the VLT, and archival HST optical imaging observations are used to study the ...
Appenzeller I., Best P. N., Binette L., Bremer M. N., C. N. Tadhunter, Clark N. E., D. Dicken, Danziger I. J., Dickson R., Howarth I. D., J. Holt, K. J. Inskip, M. Villar-Martín, Moorwood A., Morganti R., R. Morganti, Shaw M., Tadhunter C., Tadhunter C. N.   +18 more
core   +1 more source

Combined LOFAR-uGMRT analysis of the diffuse radio emission in the massive clusters Abell 773 and Abell 1351

Astronomy & Astrophysics
Context. Radio halos are diffuse megaparsec-scale nonthermal radio sources located at the center of galaxy clusters. They trace relativistic particles and magnetic fields in the intra-cluster medium.
Srikanth K. S. L., Botteon A., Cassano R., Brunetti G., Bonafede A., Bruno L., Balboni M., Bashir H., Brüggen M., Chatterjee S., Cuciti V., Dallacasa D., Datta A., de Gasperin F., Di Gennaro G., Groeneveld C., Kale R., Malik M. A., Paul S., Salunkhe S., van Weeren R. J., Venturi T., Zhang X.   +22 more
doaj   +1 more source

Probing the evolution of galaxy clusters using SZ effect and non-thermal emission: First results from A1413 [PDF]

EPJ Web of Conferences
Mass is the most fundamental property of galaxy clusters. However, measuring it is still a challenge. Calibrating mass from intracluster medium observables such as the Sunyaev-Zel’dovich (SZ) effect is subject to uncertainty and biases because of the ...
Pachchigar M., Perrott Y., Parashar T.
doaj   +1 more source

Galaxy Cluster Environments of Radio Sources

, 2011
Using the Sloan Digital Sky Survey (SDSS) and the FIRST (Faint Images of the Radio Sky at Twenty Centimeters) catalogs, we examined the optical environments around double-lobed radio sources. Previous studies have shown that multi-component radio sources
Abazajian, Ascasibar, Bahcall, Blanc, Blanton, Blanton, Blanton, Blanton, Blanton, Blanton, Bower, Bradač, Brodwin, Budavári, Burns, Clarke, Condon, Croft, Csabai, Daddi, Dalton, Deltorn, Dickinson, D’Onghia, Elizabeth L. Blanton, Fanaroff, Gal, Garilli, Gladders, Gladders, Gladders, Gómez, Ivezić, Jee, Joshua D. Wing, Koester, Koester, Krick, Lin, Lin, Lin, Lumsden, Martini, McMahon, Menanteau, Miller, Oklopčić, Ostrander, Owen, Oyaizu, Proctor, Reiprich, Roettiger, Sarazin, Schlegel, Smith, Smolčić, Vanderlinde, Vikhlinin, Voges, Wen, York, Zirbel, Zwicky   +63 more
core   +1 more source

RADIO RELICS IN CLUSTERS OF GALAXIES

Journal of The Korean Astronomical Society, 2004
6 pages, 8 figures. Proceedings of the 3rd Korean Astrophysics Workshop "Cosmic Rays and Magnetic Fields in Large Scale Structure", Pusan, Korea, August 2004, eds. H. Kang & D.
GIOVANNINI, GABRIELE, FERETTI L.
openaire   +3 more sources

Radio Galaxies at VHE Energies [PDF]

Galaxies, 2018
Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general.
Frank Rieger, Amir Levinson
openaire   +3 more sources

Early Science with the Karoo Array Telescope: a Mini-Halo Candidate in Galaxy Cluster Abell 3667

, 2014
Abell 3667 is among the most well-studied galaxy clusters in the Southern Hemisphere. It is known to host two giant radio relics and a head-tail radio galaxy as the brightest cluster galaxy.
Magnus, L., Oozeer, N., Riseley, C. J., Scaife, A. M. M., Wise, M. W.   +4 more
core   +1 more source