Zobrazeno 1 - 10
of 177
pro vyhledávání: '"Brunetti, Gianfranco"'
Autor:
Santra, Ramananda, Kale, Ruta, Giacintucci, Simona, Wik, Daniel. R., Venturi, Tiziana, Dallacasa, Daniele, Cassano, Rossella, Brunetti, Gianfranco, Joshi, Deepak Chandra
We present the first multi-frequency analysis of the candidate ultra-steep spectrum radio halo in the galaxy cluster PLCKESZ G171.94$-$40.65, using the upgraded Giant Metrewave Radio telescope (uGMRT; 400 MHz), and Karl G. Jansky Very Large Array (JV
Externí odkaz:
http://arxiv.org/abs/2409.18075
Autor:
Domínguez-Fernández, Paola, ZuHone, John, Weinberger, Rainer, Bellomi, Elena, Hernquist, Lars, Nulsen, Paul, Brunetti, Gianfranco
AGN bubbles in cool-core galaxy clusters are believed to significantly facilitate the transport of cosmic ray electrons (CRe) throughout the cluster. Recent radio observations are revealing complex morphologies of cluster diffuse emission, potentiall
Externí odkaz:
http://arxiv.org/abs/2406.19681
Autor:
Beduzzi, Luca, Vazza, Franco, Cuciti, Virginia, Brunetti, Gianfranco, Brüggen, Marcus, Wittor, Denis
Context. The recent discovery of so-called mega radio halos as a new class of diffuse, steep-spectrum radio sources in clusters of galaxies has raised questions about the origin and the evolution of cluster-wide radio emission. Aims. We investigate w
Externí odkaz:
http://arxiv.org/abs/2406.09859
Autor:
Ubertosi, Francesco, Giroletti, Marcello, Gitti, Myriam, Biava, Nadia, De Rubeis, Emanuele, Bonafede, Annalisa, Feretti, Luigina, Bondi, Marco, Bruno, Luca, Liuzzo, Elisabetta, Ignesti, Alessandro, Brunetti, Gianfranco
We present a multi-frequency (144 MHz - 9 GHz) and multi-scale (5 pc - 50 kpc) investigation of the central radio galaxy in RBS 797, by means of JVLA, LOFAR (with international stations), e-Merlin, VLBA and EVN data. We investigate the morphological
Externí odkaz:
http://arxiv.org/abs/2405.08079
Autor:
Giacintucci, Simona, Venturi, Tiziana, Markevitch, Maxim, Brunetti, Gianfranco, Clarke, Tracy, Kale, Ruta
We present radio and X-ray studies of A3444 and MS1455.0+2232, two galaxy clusters with radio minihalos in their cool cores. A3444 is imaged using the Giant Metrewave Radio Telescope (GMRT) at 333, 607 and 1300 MHz and the Very Large Array at 1435 MH
Externí odkaz:
http://arxiv.org/abs/2312.02824
Recent radio observations with Low-Frequency Array (LOFAR) discovered diffuse emission extending beyond the scale of classical radio halos. The presence of such mega halos indicates that the amplification of the magnetic field and acceleration of rel
Externí odkaz:
http://arxiv.org/abs/2312.01120
Autor:
Santra, Ramananda, Kale, Ruta, Giacintucci, Simona, Markevitch, Maxim, Luca, Federico De., Bourdin, Herve, Venturi, Tiziana, Dallacasa, Daniele, Cassano, Rossella, Brunetti, Gianfranco, Buch, Kaushal
We present the first detailed analysis of the ultra-steep spectrum radio halo in the merging galaxy cluster Abell 521, based on upgraded Giant Metrewave Radio telescope (uGMRT) observations. The combination of radio observations (300-850 MHz) and arc
Externí odkaz:
http://arxiv.org/abs/2311.09717
Autor:
Botteon, Andrea, Markevitch, Maxim, van Weeren, Reinout J., Brunetti, Gianfranco, Shimwell, Timothy W.
Publikováno v:
A&A 674, A53 (2023)
Dynamical motions in the ICM can imprint distinctive features on X-ray images that map the thermal emission from galaxy clusters, such as sharp surface brightness discontinuities due to shocks and cold fronts. The gas dynamics during cluster mergers
Externí odkaz:
http://arxiv.org/abs/2302.07881
Autor:
Rudnick, Lawrence, Bruggen, Marcus, Brunetti, Gianfranco, Cotton, William, Forman, William, Jones, Thomas W., Nolting, Chris, Schellenberger, Gerrit, van Weeren, Reinout
Thin synchrotron-emitting filaments are increasingly seen in the intracluster medium (ICM). We present the first example of a direct interaction between a magnetic filament, a radio jet, and a dense ICM clump in the poor cluster Abell 194. This enabl
Externí odkaz:
http://arxiv.org/abs/2206.14319
Autor:
Vacca, Valentina, Shimwell, Timothy, Perley, Richard A., Govoni, Federica, Murgia, Matteo, Feretti, Luigina, Giovannini, Gabriele, Loi, Francesca, Carretti, Ettore, Cova, Filippo, Gastaldello, Fabio, Girardi, Marisa, Ensslin, Torsten, Akamatsu, Hiroki, Bonafede, Annalisa, Bonnassieux, Etienne, Boschin, Walter, Botteon, Andrea, Brunetti, Gianfranco, Brueggen, Marcus, Finoguenov, Alexis, Hoang, Duy, Iacobelli, Marco, Orru', Emanuela, Paladino, Rosita, Roettgering, Huub, van Weeren, Reinout, Vitello, Fabio, Wittor, Denis
The galaxy cluster Abell 523 (A523) hosts an extended diffuse synchrotron source historically classified as a radio halo. Its radio power at 1.4 GHz makes it one of the most significant outliers in the scaling relations between observables derived fr
Externí odkaz:
http://arxiv.org/abs/2201.12207