Zobrazeno 1 - 10
of 693
pro vyhledávání: '"Shimwell, T."'
Autor:
Piras, S., Horellou, C., Conway, J. E., Thomasson, M., del Palacio, S., Shimwell, T. W., O'Sullivan, S. P., Carretti, E., Šnidaric, I., Jelic, V., Adebahr, B., Berger, A., Best, P. N., Brüggen, M., Ruiz, N. Herrera, Paladino, R., Prandoni, I., Sabater, J., Vacca, V.
The aim of this study is to probe the sub-mJy polarized source population with LOFAR. We present the method used to stack LOFAR polarization datasets, the resulting catalog of polarized sources, and the derived polarized source counts. The ELAIS-N1 f
Externí odkaz:
http://arxiv.org/abs/2406.08346
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.
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.
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
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:
Igo, Z., Merloni, A., Hoang, D., Buchner, J., Liu, T., Salvato, M., Arcodia, R., Bellstedt, S., Brüggen, M., Croston, J. H., de Gasperin, F., Georgakakis, A., Hardcastle, M. J., Nandra, K., Ni, Q., Pasini, T., Shimwell, T., Wolf, J.
Publikováno v:
A&A 686, A43 (2024)
Radio jets are present in a diverse sample of AGN. However, the mechanisms of jet powering are not fully understood, and it is yet unclear to what extent they obey mass-invariant scaling relations, similar to those found for the triggering and fuelli
Externí odkaz:
http://arxiv.org/abs/2402.16943
Autor:
Lusetti, G., de Gasperin, F., Cuciti, V., Brüggen, M., Spinelli, C., Edler, H., Brunetti, G., van Weeren, R. J., Botteon, A., Di Gennaro, G., Cassano, R., Tasse, C., Shimwell, T. W.
Low-frequency radio observations show an increasing number of radio galaxies located in galaxy clusters that display peculiar morphologies and spectral profiles. This is the result of the dynamical interaction of the galaxy with the surrounding mediu
Externí odkaz:
http://arxiv.org/abs/2401.04710
Autor:
Bondi, M., Scaramella, R., Zamorani, G., Ciliegi, P., Vitello, F., Arias, M., Best, P. N., Bonato, M., Botteon, A., Brienza, M., Brunetti, G., Hardcastle, M. J., Magliocchetti, M., Massaro, F., Morabito, L. K., Pentericci, L., Prandoni, I., Röttgering, H. J. A., Shimwell, T. W., Tasse, C., van Weeren, R. J., White, G. J.
We present the first deep (72 hours of observations) radio image of the Euclid Deep Field North (EDFN) obtained with the LOw-Frequency ARray (LOFAR) High Band Antenna (HBA) at 144 MHz. The EDFN is the latest addition to the LOFAR Two-Metre Sky Survey
Externí odkaz:
http://arxiv.org/abs/2312.06247
Autor:
Botteon, A., Gastaldello, F., ZuHone, J. A., Balboni, M., Bartalucci, I., Brunetti, G., Bonafede, A., Brüggen, M., Shimwell, T. W., van Weeren, R. J.
We report on the detection of diffuse radio emission with peculiar morphology in the central region of the galaxy cluster Abell 2657. The most striking feature identified in our 144 MHz LOFAR image is a bifurcated radio arc that extends for a project
Externí odkaz:
http://arxiv.org/abs/2310.16874
Autor:
Nakoneczny, S. J., Alonso, D., Bilicki, M., Schwarz, D. J., Hale, C. L., Pollo, A., Heneka, C., Tiwari, P., Zheng, J., Brüggen, M., Jarvis, M. J., Shimwell, T. W.
Publikováno v:
A&A, 681, A105 (2024)
We combine the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) second data release (DR2) catalogue with gravitational lensing maps from the Cosmic Microwave Background (CMB) to place constraints on the bias evolution of LoTSS radio galaxies,
Externí odkaz:
http://arxiv.org/abs/2310.07642