Today on #astroph
"Magnetic fields at the dawn of structure formation I. The CARLA J1510+5958 proto-cluster" by A. Pagliotta @annalisa_bonafede et al.
https://arxiv.org/pdf/2606.12522
it presents a study of the CARLA J1510+5958 proto-cluster at z = 1.72 with the JVLA L-band to infer the strength of the proto-ICM and the role of AGN at this epoch, finding a B>0.4muG lower limit there.
On #astroph today:
"The ultra low-frequency spectral properties of bright extended radio galaxies in the 3CRR catalogue"
by J. Boxelaar et al.
https://arxiv.org/pdf/2606.13493
It presents an updated analysis of 22 sources observed with LOFAR and ASKAP to cover from 1400MHz to 58MHz, to model how electrons age along the lobes of FR I and II radio galaxies: simple ageing models seems to struggle in explaining most of radio structures.
#paperday on #astroph
"Isochrones in primordial magnetic field evolution"
by A. Brandenburg, Cielo, Iarygina & myself
https://arxiv.org/pdf/2606.10863
where we present Pencil simulations of the evolution of different stochastic magnetic field configurations in the early universe, with the goal of finding simple ways to rescale them to the same evolutionary sequence.
(submitted to A&A)
#paperday on #astroph:
"Galaxy clusters in the LoTSS-DR3:
Catalogues and detection pipeline for diffuse radio emission" by Chiara Stuardi et al. including me
https://arxiv.org/pdf/2605.06400
It presents the automated detection of diffuse radio emission in clusters observed in radio, using a Convolutional neural network (RADIO-UNET) trained on my #SimulatedUniverses !
Once in a while, a decent use of #AI to do something humans cannot do on this scale (as quickly).
"The Impact of the Magnetised Cosmic Web on Ultra High Energy Cosmic Ray Propagation" by Allegra Firinu, myself and Carmelo Evoli.
We investigated the role of realistic extragalactic magnetic fields in deflecting E>1e18eV cosmic rays, effectively creating "an horizon" beyond which particles cannot reach us, as they are trapped by magnetic fields.
Two cool papers today in #astroph, related to our #COSMOMAG exploration:
https://arxiv.org/pdf/2604.25647
Intergalactic Magnetic Field constraints from detected very high-energy Gamma-Ray Bursts using the Cherenkov Telescope Array Observatory (Keita et al.)
https://arxiv.org/abs/2604.24835 JWST Constraints on Primordial Magnetic Fields (Fairbarn et al)
Both explore the upper and lower limits allowed for primordial fields in the Universe, with different effects.
Beautiful relativistic MHD simulations of the initial stage of jets expansion, as a function of their different orientation with respect to the main axis of the halo of their host galaxy.
New simulations using the PLUTO code by G. Giri and collaborators today on #astroph
https://arxiv.org/abs/2604.05471
"Galactic-scale evolution of classical and complex radio galaxies. Impact of ambient morphology and jet geometry"
A new radio analysis of the double radio relic (=pairs of expanding merger shock waves, ~Megaparsec wide) in the merging cluster of galaxies MACS
J1752.0+4440
by M. Della Chiesa et al. today on #astroph https://arxiv.org/pdf/2604.02410
Deep multi-wavelength radio observations allow to study how radio emitting electrons age in different part of the relic, helping to better understand the plasma properties in regions deeply affected by shocks
https://mastodon.social/@franco_vazza/116328055383790715
Well let me at least point to one legit article today on #astroph, by my colleague here F. Ubertosi:
https://arxiv.org/abs/2603.28864
"AGN Fueling and Radio Jet Evolution in the Galaxy Group NGC 5044 revealed by VLBA HI Absorption and Proper-Motion Radio Observations"
which is a serious one.
(At least, I think?)
W-O-W
people really really were in the mood today on #astroph
I do not remember such an avalanche of "jokes".
to the point all other few serious articles in todays list are just going to be lost for me.
franco_vazza