"Magnetic fields and relativistic electrons fill entire galaxy cluster" is now also on arXiv:

https://arxiv.org/abs/2211.01493

#ScienceAdvancesResearch #irapapers
@UniLeiden @LeidenScienceEN @Unibo @IRA_INAF @ASTRON_NL @LOFAR

That's it for this paper, and it's now time to thank my collaborators, some of them are on Twitter: @roxycas @fabiogasta @AnnalisBonafede @astro_jit @HambObs @IRA_INAF #irapapers @mediainaf @LOFAR @ASTRON_NL @chandraxray 10/10

Shock acceleration of cosmic ray protons in the ICM, by Wittor+ (@franco_vazza) #irapapers
Only when supercritical (M>2.25)-quasi-parallel (theta<45°) shocks are considrered, gamma-ray emission from CRp is below the observed Fermi upper limits on clusters
https://arxiv.org/abs/2004.10193

Polarization study of giant radio galaxies with @LOFAR, by Stuardi+ (with @AnnalisBonafede, @HambObs, @pratikd13)
The work shows the potential of low-frequency observations in detecting small variations in rotation measure #irapapers @IRA_INAF https://arxiv.org/abs/2004.05169

Radio analysis of the double relic cluster RXCJ1314, by Stuardi+ (including @franco_vazza, @HambObs, myself) #irapapers
A detailed spectral study and RM synthesis of the cluster was performed thanks to the new JVLA multi-frequency/multi-configuration data
https://arxiv.org/abs/1908.11868

My latest accepted paper is on the arxiv today! #irapapers
We studied the nearby cluster pair RXCJ1825/CIZAJ1824 (or Lyra complex) with @LOFAR and @ESA_XMM pointing out the role of cluster dynamics in the formation of diffuse radio emission in the ICM 1/9
https://arxiv.org/abs/1908.07527

A new, distant, radio halo discovered with @LOFAR, by Cassano+ (@roxycas, @fabiogasta, @HambObs, @IRA_INAF) #irapapers
Being at z=0.616, PSZ2G099 is one of the most distant halos known so far and its emission is barely detected at 1.4 GHz with the JVLA 1/2
https://arxiv.org/abs/1907.10304

Today on arxiv: my paper on shock acceleration efficiency in radio relics, recently submitted to @AandA_journal #irapapers
https://arxiv.org/abs/1907.00966
We wanted to answer to this question: can radio relics be reproduced by DSA from the thermal pool? 1/10

Analysis of merging cluster A523, by Cova+ (@fabiogasta, @max_gasp, @mcrossetti_twit) #irapapers @IRA_INAF This cluster hosts a peculiar radio halo. The work is based in X-ray observation with @ESA_XMM and @NASANuSTAR (no evidence for IC emission, sorry)
https://arxiv.org/abs/1906.07730

Paper day! Radio and X-ray study of the merging galaxy cluster A959, by Birzan+ (@HambObs, @roxycas) #irapapers
Our @LOFAR observations indicate the presence of a radio halo and a likely radio relic.
https://arxiv.org/abs/1905.10156

A lot of institutions and people were involved in these works, some of them are on Twitter: @IRA_INAF, @ASTRON_NL, @HambObs, @SterrewachtNL, @UniboMagazine, @uva_api, @SRON_Space, @ESO, @fabiogasta, @roxycas, @shulevski, @Andra_Stroe, @HirokiAkamatsu, @franco_vazza #irapapers

My latest paper is finally on arXiv! We presented a radio/X-ray analysis of the spectacular cluster chain Abell 781 by using @LOFAR, GMRT, and @ESA_XMM with a particular focus on the main cluster of the chain.
https://arxiv.org/abs/1811.07930 #irapapers
1/5

White paper discussing the synergy between @SKA_telescope and @athena2028 by Cassano+ (@roxycas) @IRA_INAF #irapapers A lot of interesting science cases will be enabled by the combination of the future instruments.
https://arxiv.org/abs/1807.09080

Forecasts on the detection of radio mini-halos in galaxy clusters by Gitti+
They focused on surveys made with @LOFAR at 140 MHz and @SKA_telescope at 1.4 GHz and discussed the synergy with X-ray observations #irapapers
https://arxiv.org/abs/1806.05751

Detection of the most distant radio galaxy known to date (z=5.72) by Saxena+18. The galaxy was selected from the TGSS and followed-up with the @VLArray (spectral index 1.4). Optical follow-up observations performed with @GeminiObs and @LBTObs.
https://arxiv.org/abs/1806.01191 #irapapers

LOFAR discovery of radio emission in MACS$\,$J0717.5$+$3745 We present results from LOFAR and GMRT observations of the galaxy cluster MACS$\,$J0717.5$+$3745. The cluster is undergoing a violent merger involving at least four sub-clusters, and it is known to host a radio halo. LOFAR observations reveal new sources of radio emission in the Intra-Cluster Medium: (i) a radio bridge that connects the cluster to a head-tail radio galaxy located along a filament of galaxies falling into the main cluster, (ii) a 1.9 Mpc radio arc, that is located North West of the main mass component, (iii) radio emission along the X-ray bar, that traces the gas in the X-rays South West of the cluster centre. We use deep GMRT observations at 608 MHz to constrain the spectral indices of these new radio sources, and of the emission that was already studied in the literature at higher frequency. We find that the spectrum of the radio halo and of the relic at LOFAR frequency follows the same power law as observed at higher frequencies. The radio bridge, the radio arc, and the radio bar all have steep spectra, which can be used to constrain the particle acceleration mechanisms. We argue that the radio bridge could be caused by the re-acceleration of electrons by shock waves that are injected along the filament during the cluster mass assembly. Despite the sensitivity reached by our observations, the emission from the radio halo does not trace the emission of the gas revealed by X-ray observations. We argue that this could be due to the difference in the ratio of kinetic over thermal energy of the intra-cluster gas, suggested by X-ray observations.

Low frequency study with @LOFAR and GMRT of the massive and merging cluster MACS J0717.5+3745 by Bonafede+ (including @cjriseley, @Astro_Jamie, @franco_vazza, myself + @IRA_INAF, @HambObs, @ASTRON_NL people) #irapapers
https://t.co/HEs85eDVqX https://t.co/u8u4oCB6yw

A detailed radio study with @LOFAR, GMRT and @VLArray of the double radio relic cluster Abell 1240 by Hoang+ (including @HirokiAkamatsu, @Andra_Stroe, myself + @HambObs & @IRA_INAF people #irapapers)
https://arxiv.org/abs/1804.11352

My latest paper has been accepted! We studied the double cluster A1758 with @LOFAR, GMRT, @TheNRAO VLA and @chandraxray data and discovered the second double radio halo system known so far!
Yes, Italy joined @LOFAR! #irapapers @IRA_INAF @HambObs @ASTRON_NL
https://arxiv.org/abs/1804.09187

This is the second highest redshift cluster with a (SZ) detected #shock after El Gordo. A lot of @HambObs and @IRA_INAF people (including me) in this paper! #irapapers https://x.com/franco_vazza/status/966216058469273601