Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Osinga, E"'
Autor:
Anderson, Craig S., McClure-Griffiths, N. M., Rudnick, L., Gaensler, B. M., O'Sullivan, S. P., Bradbury, S., Akahori, T., Baidoo, L., Bruggen, M., Carretti, E., Duchesne, S., Heald, G., Jung, S. L., Kaczmarek, J., Leahy, D., Loi, F., Ma, Y. K., Osinga, E., Seta, A., Stuardi, C., Thomson, A. J. M., Van Eck, C., Vernstrom, T., West, J.
We present initial results from the Polarisation Sky Survey of the Universe's Magnetism (POSSUM), analysing 22,817 Faraday Rotation Measures (RMs) with median uncertainties of 1.2 rad m^-2 across 1,520 square degrees to study magnetised gas associate
Externí odkaz:
http://arxiv.org/abs/2407.20325
Autor:
Osinga, E., van Weeren, R. J., Brunetti, G., Adam, R., Rajpurohit, K., Botteon, A., Callingham, J. R., Cuciti, V., de Gasperin, F., Miley, G. K., Röttgering, H. J. A., Shimwell, T. W.
Publikováno v:
A&A 688, A175 (2024)
Merging galaxy clusters often host spectacular diffuse radio synchrotron sources. These sources can be explained by a non-thermal pool of relativistic electrons accelerated by shocks and turbulence in the intracluster medium. The origin of the pool a
Externí odkaz:
http://arxiv.org/abs/2405.09384
Autor:
Groeneveld, C., van Weeren, R. J., Osinga, E., Williams, W. L., Callingham, J. R., de Gasperin, F., Botteon, A., Shimwell, T., de Jong, J. M. G. H. J., Jansen, L. F., Miley, G. K., Brunetti, G., Brüggen, M., Röttgering, H. J. A.
Publikováno v:
Nature Astronomy 8 (2024) 786-795
The largely unexplored decameter radio band (10-30 MHz) provides a unique window for studying a range of astronomical topics, such as auroral emission from exoplanets, inefficient cosmic ray acceleration mechanisms, fossil radio plasma, and free-free
Externí odkaz:
http://arxiv.org/abs/2405.05311
Autor:
Hardcastle, M. J., Horton, M. A., Williams, W. L., Duncan, K. J., Alegre, L., Barkus, B., Croston, J. H., Dickinson, H., Osinga, E., Röttgering, H. J. A., Sabater, J., Shimwell, T. W., Smith, D. J. B., Best, P. N., Botteon, A., Brüggen, M., Drabent, A., de Gasperin, F., Gürkan, G., Hajduk, M., Hale, C. L., Hoeft, M., Jamrozy, M., Kunert-Bajraszewska, M., Kondapally, R., Magliocchetti, M., Mahatma, V. H., Mostert, R. I. J., O'Sullivan, S. P., Pajdosz-Śmierciak, U., Petley, J., Pierce, J. C. S., Prandoni, I., Schwarz, D. J., Shulewski, A., Siewert, T. M., Stott, J. P., Tang, H., Vaccari, M., Zheng, X., Bailey, T., Desbled, S., Goyal, A., Gonano, V., Hanset, M., Kurtz, W., Lim, S. M., Mielle, L., Molloy, C. S., Roth, R., Terentev, I. A., Torres, M.
Publikováno v:
A&A 678, A151 (2023)
The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% of the northern sky, with a total area of $\sim 5,700$ deg$^2$. The high angular resolution of LOFAR with Dutch baselines (6 arcsec) allows us to carry out optical identific
Externí odkaz:
http://arxiv.org/abs/2309.00102
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:
Rajpurohit, K., Osinga, E., Brienza, M., Botteon, A., Brunetti, G., Forman, W. R., Riseley, C. J., Vazza, F., Bonafede, A., van Weeren, R. J., Brüggen, M., Rajpurohit, S., Drabent, A., Dallacasa, D., Rossetti, M., Rajpurohit, A. S., Hoeft, M., Bonnassieux, E., Cassano, R., Miley, G. K.
Publikováno v:
A&A 669, A1 (2023)
We present the first detailed analysis of the radio halo in the merging galaxy cluster Abell 2256 using the LOFAR, uGMRT, and VLA. These observations combined with archival X-ray data allowed us to study the halo emission with unprecedented detail. T
Externí odkaz:
http://arxiv.org/abs/2209.03288
Autor:
Osinga, E., van Weeren, R. J., Andrade-Santos, F., Rudnick, L., Bonafede, A., Clarke, T., Duncan, K., Giacintucci, S., Mroczkowski, Tony, Röttgering, H. J. A.
Publikováno v:
A&A 665, A71 (2022)
It has been well established that galaxy clusters have magnetic fields. The exact properties and origin of these magnetic fields are still uncertain even though these fields play a key role in many astrophysical processes. Various attempts have been
Externí odkaz:
http://arxiv.org/abs/2207.09717
Autor:
Rajpurohit, K., van Weeren, R. J., Hoeft, M., Vazza, F., Brienza, M., Forman, W., Wittor, D., Domínguez-Fernández, P., Rajpurohit, S., Riseley, C. J., Botteon, A., Osinga, E., Brunetti, G., Bonnassieux, E., Bonafede, A., Rajpurohit, A. S., Stuardi, C., Drabent, A., Brüggen, M., Dallacasa, D., Shimwell, T. W., Röttgering, H. J. A., de Gasperin, F., Miley, G. K., Rossetti, M.
We present deep and high fidelity images of the merging galaxy cluster Abell 2256 at low frequencies, using the upgraded Giant Metrewave Radio Telescope (uGMRT) and LOw-Frequency ARray (LOFAR). This cluster hosts one of the most prominent known relic
Externí odkaz:
http://arxiv.org/abs/2111.04449
Autor:
Di Gennaro, G., van Weeren, R. J., Cassano, R., Brunetti, G., Brüggen, M., Hoeft, M., Osinga, E., Botteon, A., Cuciti, V., de Gasperin, F., Röttgering, H. J. A., Tasse, C.
Publikováno v:
A&A 654, A166 (2021)
Context. Radio halos are megaparsec-scale diffuse radio sources{ mostly} located at the centres of merging galaxy clusters. The common mechanism invoked to explain their origin is the re-acceleration of relativistic particles caused by large-scale tu
Externí odkaz:
http://arxiv.org/abs/2108.10562
Autor:
Osinga, E., van Weeren, R. J., Boxelaar, J., Brunetti, G., Botteon, A., Brüggen, M., Shimwell, T. W., Bonafede, A., Best, P. N., Bonato, M., Cassano, R., Gastaldello, F., di Gennaro, G., Hardcastle, M. J., Mandal, S., Rossetti, M., Röttgering, H. J. A., Sabater, J.
Publikováno v:
A&A 648, A11 (2021)
Low-frequency radio observations are revealing an increasing number of diffuse synchrotron sources from galaxy clusters, dominantly in the form of radio halos or radio relics. The existence of this diffuse synchrotron emission indicates the presence
Externí odkaz:
http://arxiv.org/abs/2011.08249