Francesco Ubertosi

Astrophysics postdoc at the University of Bologna

[Francesco Ubertosi @FUbertosi]

#paperday "Jet reorientation in central galaxies of clusters and groups: insights from VLBA and Chandra data", see https://t.co/pBPXANjYAV. This paper presents the results of the project I have worked on during my visit at the @CenterForAstro in fall 2022 🍂🍂

[National Radio Astronomy Observatory | NSF NRAO @TheNRAO]

NEW: Astronomers (Using @NSF VLA + VLBA) Catch Supermassive Black Hole in the Act of “Waking Up”

"This is like watching a sleeping giant wake up... It’s an incredibly rare opportunity to study the ‘before’ picture of black hole feedback.”

https://t.co/6e1lHWdKmG

[Francesco Ubertosi @FUbertosi]

Paper day! https://t.co/Euub7mFukN
We study the z~0.5 cluster CHIPS 1911+4455, a peculiar cool core with a starburst central galaxy (SFR>100 M☉/yr) and yet a very unrelaxed hot halo! Our JVLA and VLBA observations revealed a recently awakened SMBH 💥 💫

[Grant Tremblay @astrogrant]

Happy 26th, @chandraxray. Not done yet. ❤️

[Francesco Ubertosi @FUbertosi]

With myself, @mcrossetti_twit, @fabiogasta, and others

[Francesco Ubertosi @FUbertosi]

#paperday by Nicolò Rotella+: "A JVLA, GMRT, and XMM study of Abell 795: large-scale sloshing and a candidate radio phoenix". This multi-frequency study was carried out by Nicolò for his Master Thesis, defended in 2024 - and it is now accepted for A&A. See https://t.co/h7pZWG7OzB

[Giada Pignataro @giada_pignataro]

Paper day!
We explore low-density environments in superclusters of galaxies with a RM catalog of 4497 background polarized sources and constrain the magnetic field in these extended environments. On arxiv: https://t.co/z6WuvnYHCj
(w/ @aghatubrid, @AnnalisBonafede ++)

[Francesco Ubertosi @FUbertosi]

#paperday: AGN feedback in Hα-luminous galaxy clusters, by Fornasiero+ (a graduated master's student I had the pleasure of supervising!). This Chandra+JVLA analysis of A2009 completes the in-depth study of a list of X-ray & Hα bright clusters, see https://t.co/nAg34UukXT

[Francesco Ubertosi @FUbertosi]

Presenting the discoveries made possible by high spatial resolution X-ray/optical/radio observations of the galaxy cluster RBS 797 at the 25 Years of Chandra Science conference in Boston!
(thanks @MarcellaBrusa for the picture!)
#savechandra

[Francesco Ubertosi @FUbertosi]

AXIS! 🎉

[Grant Tremblay @astrogrant]

NASA has selected @PRIMAprobe and @AXISprobe (far-infrared & X-ray missions, respectively) for a competitive Phase A study.

HUGE, heartfelt congrats & wishes of success to both teams ❤️, and HUGE ❤️ to the teams whose GREAT concepts weren't selected https://t.co/Ri74vPrjhc

[Francesco Ubertosi @FUbertosi]

And the interplay between the radio jets and their gaseous atmosphere is most evident in the central 10 kpc: a nebula of "cool" gas at 10⁴ K, likely cooled out of the cospatial, hotter cluster gas (10⁷ K), is draped around the inner radio bubbles blown by the central galaxy 🌬️.

[Francesco Ubertosi @FUbertosi]

Today on arXiv: https://t.co/vXMLckTEID Abell496 is known for the spectacular sloshing of its hot gas 🌀, but what about the radio jets of its central galaxy 💥? Ultra-steep spectrum lobes, buoyantly deformed cavities, a missing mini-halo ... see our paper for details! #paperday

[Francesco Ubertosi @FUbertosi]

A couple of spoilers: thanks to its proximity to us, we could spatially resolve the shape of the bubbles driven in the gas by the relativistic jets: an ancient, buoyant, mushroom head-like structure appeared! 🍄

[Andrea Botteon @and_botteon]

Non-thermal phenomena in galaxy clusters on arxiv today:

@giada_pignataro+ is in on the extended emission between A2061-A2067 https://t.co/sqYmBPq2zd

@FUbertosi+ is in on the interaction between radio lobes and the ICM in core of A496 https://t.co/VQoXefQwxz

[Giada Pignataro @giada_pignataro]

Mind the Gap please! 🚨
What is the nature of the extended radio emission between A2061-A2067? We explore different dynamical scenarios, today on arxiv: https://t.co/o5AqzttWYO

(w/ @AnnalisBonafede, @and_botteon, @FUbertosi ++)

[Francesco Ubertosi @FUbertosi]

2 #Chandra proposals accepted as PI, for a total of >500 ks 🎉🎉

[Francesco Ubertosi @FUbertosi]

🎉

[Fabio Gastaldello @fabiogasta]

@FUbertosi talks about the role of shock fronts in the AGN feedback in galaxy groups #Sestogroups24

[Grant Tremblay @astrogrant]

10,000 @chandraxray science papers as of this week 👍

[Grant Tremblay @astrogrant]

why is NASA (effectively) cancelling Chandra?

well, here's my un-subtle chart showing why NASA Science is in so much trouble, and why it's worth fighting for.

I hope that congress acts to restore @NASA Science to $9B in 2025.