Zobrazeno 1 - 10
of 774
pro vyhledávání: '"van Weeren, R. J."'
Autor:
Pignataro, G. V., Bonafede, A., Bernardi, G., Balboni, M., Vazza, F., van Weeren, R. J., Ubertosi, F., Cassano, R., Brunetti, G., Botteon, A., Venturi, T., Akamatsu, H., Drabent, A., Hoeft, M.
The clusters Abell 2061 and Abell 2067 in the Corona Borealis supercluster have been studied at different radio frequencies and are both known to host diffuse radio emission. The aim of this work is to investigate the radio emission in between them,
Externí odkaz:
http://arxiv.org/abs/2409.15412
Autor:
Bruno, L., Venturi, T., Dallacasa, D., Brienza, M., Ignesti, A., Brunetti, G., Riseley, C. J., Rossetti, M., Gastaldello, F., Botteon, A., Rudnick, L., van Weeren, R. J., Shulevski, A., Lal, D. V.
Context. Tailed radio galaxies are shaped by ram pressure owing to the high-velocity motion of their host through the intracluster medium (ICM). Recent works have reported on the increasing complexity of the phenomenology of tailed galaxies, with dep
Externí odkaz:
http://arxiv.org/abs/2409.03453
Autor:
De Rubeis, E., Stuardi, C., Bonafede, A., Vazza, F., van Weeren, R. J., de Gasperin, F., Brüggen, M.
In this paper, we investigate the polarization properties of the double radio relics in PSZ2 G096.88+24.18 using the rotation measure synthesis, and try to constrain the characteristics of the magnetic field that reproduce the observed beam depolariz
Externí odkaz:
http://arxiv.org/abs/2408.08603
Autor:
de Jong, J. M. G. H. J., van Weeren, R. J., Sweijen, F., Oonk, J. B. R., Shimwell, T. W., Offringa, A. R., Morabito, L. K., Röttgering, H. J. A., Kondapally, R., Escott, E. L., Best, P. N., Bondi, M., Ye, H., Petley, J. W.
We present the deepest wide-field 115-166 MHz image at sub-arcsecond resolution spanning an area of 2.5 by 2.5 degrees centred at the ELAIS-N1 deep field. To achieve this, we improved the calibration for the International LOFAR Telescope. This enhanc
Externí odkaz:
http://arxiv.org/abs/2407.13247
Autor:
Botteon, A., van Weeren, R. J., Eckert, D., Gastaldello, F., Markevitch, M., Giacintucci, S., Brunetti, G., Kale, R., Venturi, T.
Abell 754 is a rich galaxy cluster at $z=0.0543$ and is considered the prototype of a major cluster merger. Like many dynamically unrelaxed systems, it hosts diffuse radio emission on Mpc-scales. Extended synchrotron sources in the intra-cluster medi
Externí odkaz:
http://arxiv.org/abs/2406.18983
Autor:
Pasini, T., de Gasperin, F., Brüggen, M., Cassano, R., Botteon, A., Brunetti, G., Edler, H. W., van Weeren, R. J., Cuciti, V., Di Gennaro, T. Shimwell. G., Gaspari, M., Hardcastle, M., Rottgering, H. J. A., Tasse, C.
Publikováno v:
A&A 689, A218 (2024)
A fraction of galaxy clusters harbor diffuse radio sources known as radio halos. The currently adopted scenario for their formation is based on second-order Fermi re-acceleration of seed electrons that is driven by merger-driven turbulence in the int
Externí odkaz:
http://arxiv.org/abs/2406.12005
Autor:
Roberts, I. D., van Weeren, R. J., de Gasperin, F., Botteon, A., Edler, H. W., Ignesti, A., Matijević, L., Tomičić, N.
Publikováno v:
A&A 689, A22 (2024)
We present the discovery of a 100 kpc low-frequency radio tail behind the nearby group galaxy, NGC 2276. The extent of this tail is a factor of ten larger than previously reported from higher-frequency radio and X-ray imaging. The radio morphology of
Externí odkaz:
http://arxiv.org/abs/2406.09221
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:
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