Zobrazeno 1 - 10
of 35
pro vyhledávání: '"MARCHEGIANI, Paolo"'
Autor:
Vacca, Valentina, Govoni, Federica, Murgia, Matteo, Perley, Richard A., Feretti, Luigina, Giovannini, Gabriele, Carretti, Ettore, Gastaldello, Fabio, Cova, Filippo, Marchegiani, Paolo, Battistelli, Elia, Boschin, Walter, Ensslin, Torsten A., Girardi, Marisa, Loi, Francesca, Radiconi, Federico
Large-scale magnetic fields reveal themselves through diffuse synchrotron sources observed in galaxy clusters such as radio halos. Total intensity filaments of these sources have been observed in polarization as well, but only in three radio halos ou
Externí odkaz:
http://arxiv.org/abs/2206.03402
Publikováno v:
Astrophys Space Sci 365:188(2020)
This work presents an analytical approach for studying the cosmological 21cm background signal from the Dark Ages (DA) and subsequent Epoch of Reionization (EoR). We simulate differential observations of a galaxy cluster to demonstrate how these epoc
Externí odkaz:
http://arxiv.org/abs/2012.06534
Autor:
Button, Charissa, Marchegiani, Paolo
Although radio relics are understood to originate in intracluster shock waves resulting from merger shocks, the most widely used model for describing this (re-)acceleration process at shock fronts, the diffusive shock acceleration (DSA) model, has se
Externí odkaz:
http://arxiv.org/abs/2009.10164
Publikováno v:
PoS(HEASA2018)006
The SZE-21cm has been proposed as an alternative probe for the Dark Ages (DA) and the Epoch of Reionization (EoR). The effect is produced when photons of the 21cm background are inverse Compton (up-)scattered by electrons residing in hot plasma of co
Externí odkaz:
http://arxiv.org/abs/1903.12631
Publikováno v:
PoS(HEASA2017)008
In pursuit of understanding the early Universe and early processes occurring particularly in the Dark Ages (DA) and the Epoch of Reionization (EoR), it is vital that a suitable probe is identified. Probing these epochs will be useful in studies of th
Externí odkaz:
http://arxiv.org/abs/1810.10115
Autor:
Malu, Siddharth, Datta, Abhirup, Colafrancesco, Sergio, Marchegiani, Paolo, Subrahmanyan, Ravi, Narasimha, D, Wieringa, Mark H.
Electrons at relativistic speeds, diffusing in magnetic fields, cause copious emission at radio frequencies in both clusters of galaxies and radio galaxies, through the non-thermal radiation emission called synchrotron. However, the total power radia
Externí odkaz:
http://arxiv.org/abs/1705.08405
Autor:
Massaro, Enrico, Maselli, Alessandro, Leto, Cristina, Marchegiani, Paolo, Perri, Matteo, Giommi, Paolo, Piranomonte, Silvia
The 5th edition of the Roma-BZCAT Multifrequency Catalogue of Blazars is available in a printed version and online at the ASDC website (http://www.asdc.asi.it/bzcat); it is also in the NED database. It presents several relevant changes with respect t
Externí odkaz:
http://arxiv.org/abs/1502.07755
Non-Planckian (NP) spectral modifications of the CMB radiation spectrum can be produced due to the existence of a non-zero value of the plasma frequency at the recombination epoch. We present here an analysis of NP effects on the radio cosmological b
Externí odkaz:
http://arxiv.org/abs/1501.04818
Autor:
Colafrancesco, Sergio, Regis, Marco, Marchegiani, Paolo, Beck, Geoff, Beck, Rainer, Zechlin, Hannes, Lobanov, Andrei, Horns, Dieter
Dark Matter (DM) is a fundamental ingredient of our Universe and of structure formation, and yet its nature is elusive to astrophysical probes. Information on the nature and physical properties of the WIMP (neutralino) DM (the leading candidate for a
Externí odkaz:
http://arxiv.org/abs/1502.03738
Autor:
Grainge, Keith, Borgani, Stefano, Colafrancesco, Sergio, Ferrari, Chiara, Scaife, Anna, Marchegiani, Paolo, Emritte, S., Weller, J.
Studying galaxy clusters through their Sunyaev-Zel'dovich (SZ) imprint on the Cosmic Microwave Background has many important advantages. The total SZ signal is an accurate and precise tracer of the total pressure in the intra-cluster medium and of cl
Externí odkaz:
http://arxiv.org/abs/1412.5868