23–27 Sept 2024
Hotel Villa Tuscolana
Europe/Rome timezone

Non-thermal lobe of the Milky Way powered by the Galactic Center outflows

25 Sept 2024, 14:51
17m
Sala Vittorio Emanuele

Sala Vittorio Emanuele

Speaker

Heshou Zhang (INAF - OA Brera)

Description

The large-scale structures such as Fermi Bubbles and eROSITA Bubbles provide a unique opportunity to study our Milky Way. However, the nature and origin of these large structures are still under debate. In this talk, I will present the identification of several kpc-scale magnetised structures based on their polarized radio emission and their gamma-ray counterparts, which can be interpreted as the radiation of relativistic electrons in the Galactic magnetic halo. These non-thermal structures extend far above and below the Galactic plane and are spatially coincident with the thermal X-ray emission from the eROSITA Bubbles. The morphological consistency of these structures suggests a common origin, which can be sustained by Galactic outflows driven by the active star-forming regions located at 3 − 5 kpc from the Galactic Centre. These results reveal how X-ray-emitting and magnetised halos of spiral galaxies can be related to intense star formation activities and suggest that the X-shaped coherent magnetic structures observed in their halos can stem from galaxy outflows.

Primary author

Heshou Zhang (INAF - OA Brera)

Co-authors

Dr Gabriele Ponti (INAF-OAB) Dr Ettore Carretti (INAF-IRA) Prof. Ruo-Yu Liu (Nanjing University) Prof. Mark Morris (UCLA) Prof. Marijke Haverkorn (Radbound University) Dr Nicola Locatelli (INAF-OAB) Ms Xueying Zheng (MPE) Prof. Felix Aharonian (MPIK) Dr Hai-Ming Zhang (Guangxi University) Ms Yi Zhang (MPE) Mr Giovanni Stel (INAF-OAB) Prof. Andrew Strong (MPE) Mr Micheal Yeung (MPE) Dr Andrea Merloni (MPE)

Presentation materials