Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Biava, N"'
Autor:
Pignataro, G. V., Bonafede, A., Bernardi, G., de Gasperin, F., Brunetti, G., Pasini, T., Vazza, F., Biava, N., de Jong, J. M. G. H. J., Cassano, R., Botteon, A., Brüggen, M., Röttgering, H. J. A., van Weeren, R. J., Shimwell, T. W.
Publikováno v:
A&A 685, L10 (2024)
Recent low-frequency radio observations at 140 MHz discovered a 3 Mpc-long bridge of diffuse emission connecting the galaxy clusters Abell 0399 and Abell 0401. We present follow-up observations at 60 MHz to constrain the spectral index of the bridge,
Externí odkaz:
http://arxiv.org/abs/2405.00772
Autor:
Biava, N., Bonafede, A., Gastaldello, F., Botteon, A., Brienza, M., Shimwell, T. W., Brunetti, G., Bruno, L., Rajpurohit, K., Riseley, C. J., van Weeren, R. J., Rossetti, M., Cassano, R., De Gasperin, F., Drabent, A., Rottgering, H. J. A., Edge, A. C., Tasse, C.
Radio observations of a few cool-core galaxy clusters have revealed the presence of diffuse emission on cluster scales, similar to what was found in merging clusters in the form of radio halos. These sources might suggest that a minor merger, while n
Externí odkaz:
http://arxiv.org/abs/2403.09802
Autor:
Riseley, C. J., Bonafede, A., Bruno, L., Botteon, A., Rossetti, M., Biava, N., Bonnassieux, E., Loi, F., Vernstrom, T., Balboni, M.
Publikováno v:
A&A 686, A44 (2024)
Clusters of galaxies are turbulent environments, whether merging systems with a turbulent intracluster medium (ICM) or relaxed systems sloshing within the potential well. In many such clusters, diffuse radio sources associated with the ICM are found:
Externí odkaz:
http://arxiv.org/abs/2403.00414
Autor:
Bonafede, A., Gitti, M., La Bella, N., Biava, N., Ubertosi, F., Brunetti, G., Lusetti, G., Brienza, M., Riseley, C. J., Stuardi, C., Botteon, A., Ignesti, A., Röttgering, H., van Weeren, R. J.
In this work, we analysed new LOw Frequency ARray observations of the mini halo in the cluster RBS797, together with archival Very Large Array observations and the recent Chandra results. This cluster is known to host a powerful active galactic nucle
Externí odkaz:
http://arxiv.org/abs/2310.07773
Autor:
Bruno, L., Botteon, A., Shimwell, T., Cuciti, V., de Gasperin, F., Brunetti, G., Dallacasa, D., Gastaldello, F., Rossetti, M., van Weeren, R. J., Venturi, T., Russo, S. A., Taffoni, G., Cassano, R., Biava, N., Lusetti, G., Bonafede, A., Ghizzardi, S., De Grandi, S.
Publikováno v:
A&A 678, A133 (2023)
Turbulence introduced into the intra-cluster medium (ICM) through cluster merger events transfers energy to non-thermal components, and can trigger the formation of diffuse synchrotron radio sources. Typical diffuse sources in the forms of giant radi
Externí odkaz:
http://arxiv.org/abs/2308.07603
Autor:
Riseley, C. J., Biava, N., Lusetti, G., Bonafede, A., Bonnassieux, E., Botteon, A., Loi, F., Brunetti, G., Cassano, R., Osinga, E., Rajpurohit, K., Rottgering, H. J. A., Shimwell, T., Timmerman, R., van Weeren, R. J.
Many relaxed cool-core clusters host diffuse radio emission on scales of hundreds of kiloparsecs: mini-haloes. However, the mechanism responsible for generating them, as well as their connection with central active galactic nuclei, is elusive and man
Externí odkaz:
http://arxiv.org/abs/2308.01464
Autor:
Candini, S., Brienza, M., Bonafede, A., Rajpurohit, K., Biava, N., Murgia, M., Loi, F., van Weeren, R. J., Vazza, F.
Publikováno v:
A&A 677, A4 (2023)
Radio galaxies are a subclass of active galactic nuclei in which accretion onto the supermassive black hole releases energy via relativistic jets. The jets are not constantly active throughout the life of the host galaxy and alternate between active
Externí odkaz:
http://arxiv.org/abs/2305.18077
Autor:
Bonafede, A., Brunetti, G., Rudnick, L., Vazza, F., Bourdin, H., Giovannini, G., Shimwell, T. W., Zhang, X., Mazzotta, P., Simionescu, A., Biava, N., Bonnassieux, E., Brienza, M., Brüggen, M., Rajpurohit, K., Riseley, C. J., Stuardi, C., Feretti, L., Tasse, C., Botteon, A., Carretti, E., Cassano, R., Cuciti, V., de Gasperin, F., Gastaldello, F., Rossetti, M., Rottgering, H. J. A., Venturi, T., van Weeren, R. J.
We present LOw Frequency ARray observations of the Coma cluster field at 144\,MHz. The cluster hosts one of the most famous radio halos, a relic, and a low surface-brightness bridge. We detect new features that allow us to make a step forward in the
Externí odkaz:
http://arxiv.org/abs/2203.01958
Autor:
Riseley, C. J., Rajpurohit, K., Loi, F., Botteon, A., Timmerman, R., Biava, N., Bonafede, A., Bonnassieux, E., Brunetti, G., Enßlin, T., Di Gennaro, G., Ignesti, A., Shimwell, T., Stuardi, C., Vernstrom, T., van Weeren, R. J.
Radio mini-haloes are poorly-understood, moderately-extended diffuse radio sources that trace the presence of magnetic fields and relativistic electrons on scales of hundreds of kiloparsecs, predominantly in relaxed clusters. With relatively few conf
Externí odkaz:
http://arxiv.org/abs/2112.07364
Autor:
Biava, N., de Gasperin, F., Bonafede, A., Edler, H. W., Giacintucci, S., Mazzotta, P., Brunetti, G., Botteon, A., Brüggen, M., Cassano, R., Drabent, A., Edge, A. C., Enßlin, T., Gastaldello, F., Riseley, C. J., Rossetti, M., Rottgering, H. J. A., Shimwell, T. W., Tasse, C., van Weeren, R. J.
Diffuse radio emission at the centre of galaxy clusters has been observed both in merging clusters on scales of Mpc, called giant radio haloes, and in relaxed systems with a cool-core on smaller scales, named mini haloes. Giant radio haloes and mini
Externí odkaz:
http://arxiv.org/abs/2110.01629